JP7396628B2 - Image projection device, exhibition device, evaluation device, evaluation method and evaluation system - Google Patents

Description

The present invention relates to an image projection device, an exhibition device, an evaluation device, an evaluation method, and an evaluation system for a glasses-type image display device.

2. Description of the Related Art Head-mounted displays (HMDs) have been proposed that display images sent from a computer or the like on a display section mounted on the head in front of the eyes. It is desirable for the HMD to have the coordinates of the display section fixed relative to the coordinates of the wearer's eyes, and a glasses-type head-mounted display (glasses-type HMD) is promising. Glass-type HMDs include a glasses-integrated type in which glasses and a display (display section) are integrated, and a glasses-attached type in which a device including a display section is attached to a frame of glasses or the like. A scouter type, which has a simplified shape of glasses, and a type in which a display section is incorporated and fixed into goggles, a helmet, etc., are also understood as extensions or modified shapes of the glasses type HMD. Hereinafter, such an HMD will be referred to as a glasses-type image display device.
A head-mounted display is a device that displays videos and movies taken with a camera or the like, or movie images based on external data such as character information, so that the user can see them visually, or by directly projecting them onto the user's retinas. Patent Documents 1 and 2 are shown as examples of eyeglass-type image display devices.
Patent Document 1 is an example of a glasses-type HMD in which a user actively views a virtual image. Further, Patent Document 2 is an example of a retinal projection glasses type head mounted display. A retinal projection glasses type HMD scans laser light and projects it directly onto the retina, and because the light beam is narrow, it is expected to have focus-free characteristics. As the optical system, a Maxwellian optical system is often adopted.

Japanese Patent Application Publication No. 2006-85011 Unexamined Japanese Patent Publication No. 2018-116219

By the way, in the development of these glasses-type HMDs, it is necessary to objectively judge how the images of the glasses-type HMD under development actually look to the human eye, and to evaluate the glasses-type HMD from those images. There is a desire to do so.
For example, a problem when displaying a glasses-type HMD at a trade show or store is that it is impossible to judge how the glasses-type HMD will look until a visitor or client actually puts it on. . For example, AR (Augmented Reality Technology) displays digital images superimposed on the real world, and if AR is realized with a glasses-type HMD, information will be presented as if things from the digital world exist in the real world. However, it is not possible to judge how the user actually looks unless he or she puts on the glasses-type HMD. This is a problem not only during product development but also for eyeglass-type HMDs during product sales.
In addition, for eyeglass-type HMDs, the optical system was developed by calculating the light flux projected onto the retina through optical simulation using optical design software, but as for how it actually looks, It is difficult to judge unless you try it directly. The reason for analyzing and evaluating images by directly wearing glasses-type HMDs is that the height of the nose when wearing glasses and how each subject looks differs, so evaluation results can be shared among multiple developers. This is because it is difficult. Additionally, although laser light is generally used in retinal projection glasses-type HMDs, in the early stages of development, developers were faced with the issue of safety, such as whether it would be safe to project the laser light being developed onto the retina. be.

In order to solve the above-mentioned problems, a first means includes an image projection device for projecting an image based on the image when a wearer wears a glasses-type image display device and views the image. A human head portion having a through hole formed therein, a first support portion formed at the helix position, and a second support portion formed at the external nose position from the root of the nose to the dorsum of the nose. The eyeglass-type image display device includes a mask model, and a retinal screen that is placed behind the through hole and displays the projected image in a visible manner, and is controlled by the first support portion and the second support portion. I decided to support it.
This allows a third party to view the image projected on the screen and create a pseudo-image similar to the image the wearer is actually viewing while wearing the glasses-type image display device. You can see it. In this way, by objectively viewing an image close to the image that the wearer actually sees while wearing it as a third party, it will not only help the developer during development, but also allow non-developers to For example, by showing such an image to the general public as a demonstration, it is possible to make the general public realize what kind of image appears in the human eye without wearing a glasses-type image display device.
In particular, when displaying image information, text information, etc. that is not the actual scenery of the outside world on the eyeglass-type image display device, users such as the wearer or a third party do not have to wear the eyeglass-type image display device. This allows you to experience it in a simulated way. Further, if the eyeglass-type image display device is a retinal projection eyeglass-type HMD, it is possible to virtually experience that an image is formed on the retina without a shift in focus without wearing the eyeglass-type HMD.
Here, when a third party views the image projected on the screen, it is possible to view the image from either the front or the back of the screen, but it is especially preferable that the screen is transparent to the image, and the transmitted image is viewed from the back. This is advantageous because the image projected onto the screen can be observed coaxially with respect to the projection.
Here, "images" include not only still images but also "videos" such as moving images.

Here, the "glasses-type image display device" is a device for presenting an image to a test subject (wearer) wearing glasses, which the test subject wears on his or her face. This device is a device that projects an image onto the subject's retina when worn by the subject, and the projection pattern on the retina can be used, for example, when the subject actively views a virtual image, or when the subject is viewing a virtual image through glasses. The subject may passively view an image directly projected onto the retina using laser light or the like. An image projection device is a device that projects an image that simulates the way a person's eyes see. "Actively viewing" means, for example, that the wearer actively views the image projected onto the lens of eyeglasses or a transparent plate placed adjacent to the lens in order to obtain visual information from the image. It is assumed that the image is viewed visually in a state where the visual acuity (focus) is correct. "Passively viewing" means, for example, when an image is projected onto the retina from a retinal projection glasses type HMD, or when the light beam from a retinal projection glasses type HMD is reflected on a reflector and the image is projected onto the retina. It is assumed that the image will be projected. With the retinal projection method, it doesn't matter whether the visual acuity (focus) is correct or not. Generally, laser light, which is coherent light, is used as image projection light.

A "retinal screen" is a screen on which the image of the eyeglass-type image display device is projected so that the wearer or a third party can observe the image that the wearer sees while wearing the eyeglass-type image display device. This is a screen that imitates the retina. This screen is a screen that projects an image that is reflected on the retina of the wearer, and is a screen that is placed behind the transparent hole to look like an actual retina. It is preferable to have the same curvature as the retina, but it is not necessary to have the same curvature as the retina. In order to enlarge or reduce the image for display, it is preferable that the shape is similar to the retina. The curvature is not uniform depending on the size of the eyeball, and analysis is often performed using computer equipment, so even if the screen is flat, correction calculations can be made to convert it into an image equivalent to the actual retinal image. . If the screen has the same curvature or similar shape to the retina, the image reflected on the wearer's retina can be projected onto the screen without performing correction calculations or by reducing the amount of correction calculation. good.
Further, it is preferable that the projected image of the retinal screen is made visible from the back side. In this case, when the image projected from the front through-hole is projected onto the screen, it needs to be formed on the screen, and the formed image needs to be transmitted to the back side. In order to satisfy these conditions, it is preferable that the retinal screen be made of a material that is not completely transparent but has light transmittance. For example, translucent or cloudy thin light-transmitting plastics, paper, non-woven paper, densely woven fabrics made of thin and thin threads, similarly densely knitted fabrics, etc. are suitable. The color of the material is preferably white or milky white, but black or gray may be used as long as the projected image is visible from the rear.
A "through hole" is a hole through which an image from a glasses-type image display device passes. The transparent hole may be simply a bored hole, or a transparent plate or lens imitating a crystalline lens or pupil may be fitted into the hole. It is known that the crystalline lens becomes yellower in older people than in younger people. By fitting yellow lenses or filters into the transparent holes, it is possible to reproduce the way elderly people see when wearing eyeglass-type image display devices.

A "mask model" is, for example, a mask imitating the head of an actual person. For example, the material must have a thickness of about 0.5 mm to 10 mm, and the material must have enough shape retention power to allow glasses to be hung on the helix, but the material does not matter as long as it is possible to do so. . For example, it can be constructed of plastic, plaster, wood, paper, metal, etc. In addition, the creation method may be, for example, handmade or making a mold of the head, or it may be created by molding using a mold, cutting, or using a processing device such as a 3D printer based on the 3D data of the head. Good too. In the case of manufacturing by molding or 3D printer, thermoplastic plastic (for example, ABS resin, PLA resin, etc.) or thermosetting plastic can be used as the material. The light transmittance (transparency) of the material used for the mask model can be set arbitrarily. If a material with low light transmittance is used, the wearer or a third party can observe the image projected on the retinal screen with less influence from external light. When it is desired to evaluate the quality of the image projected onto the retinal screen, it is particularly preferable to use a material for the mask model that has low light transmittance or is opaque. On the other hand, it is preferable to use a material with high light transmittance because it is possible to check the image projected onto the retinal screen from the outside through the mask model. Even if the surface is made of silicone or the like, which has the same softness as the skin, it is possible to reproduce the wearing state of the eyeglass-type image display device. The 3D data may be obtained by actual measurement or CG data.
Further, the mask model may be the entire head, or may be made up of only a portion suitable for the purpose of the present invention instead of the entire head. It is necessary to have at least a through hole formed at the eye position, a first support part formed at the helix position, and a second support part formed at the external nasal position from the root of the nose to the dorsum of the nose. However, a mask model with other organs may also be used. For example, the mask model may have a shape in which only the occiput of the head is missing, or a mask model that includes the vicinity of the mouth and chin. For example, it has a through hole formed at the eye position, a first support part formed at the helix position, and a second support part formed at the external nasal part position from the root of the nose to the dorsum of the nose. It may also be a shape in which the face part is cut into strips.
In addition, humans have brain functions that allow them to recognize a face as a ``human face'' if there are depressions or projections corresponding to the eyes, nose, or ears. Therefore, if the mask model is made with the assumption that the external nose, eye holes, and helix are clearly visible, or if it is created assuming that the external nose, eye holes, and helix are It can be interpreted as equivalent to . For example, if a mask model has protrusions that correspond to the positions of the external nose and helix for setting glasses, even if the shapes of the actual external nose and helix are quite different. It is interpreted to correspond to the external nose and helix. Of course, the external nasal part and the helix part may be imitated in the mask model.
Further, the mask model may be placed on a base having a flat top surface. This is convenient because it becomes possible to place the mask model, glasses, screen, etc. on the base together, place them on the base, and move or store them together with the base. The base may be in the form of a flat plate, or in the form of a case with the flat plate serving as a top plate. As will be described later, the mask model may be shaped to rotate or tilt.
If the "glasses" are intended to be actively viewed by the wearer, lenses with a predetermined lens power for correcting the wearer's visual acuity may be arranged. On the other hand, for example, in the case of a retinal projection glasses type HMD, a lens is not necessarily required. Note that these definitions also apply to the following means.

Further, as a second means, the mask model is configured to have only a band-shaped region including the through hole, the first support portion, and the second support portion.
By configuring only the minimum necessary parts, unnecessary parts can be eliminated, making it easier to observe the image. Furthermore, when operating the screen or installing a photographing device, it is convenient to eliminate unnecessary parts. For example, the area between the eyebrows and the wings of the nose is suitable for gazing from above because the vertical width is not very large and the necessary and sufficient head organs are located to accommodate glasses. The band-shaped region may be configured in a ring shape (that is, the entire circumference of the head), and since the occipital region is not essential, it may be configured without the occipital region. It is good if there is no occipital side because the image projected on the retinal screen can be observed coaxially with the projection, that is, from the same line of sight.
Moreover, as a third means, it is preferable to install an "observation window" in the mask model for observing the state of the screen inside the mask model from outside the mask model. The observation window can be installed by making a hole in a part of the mask model, for example, by removing the back of the mask model's head. It is particularly advantageous to place the observation window at the back of the head because the image projected onto the retinal screen can be observed coaxially. A lens or the like for magnifying and observing the state of the retinal screen may be installed in the observation window. By combining mirrors, half mirrors, etc., even if the observation window is installed at the top of the head, the image projected on the retinal screen can be viewed in the same way as when it is installed at the back of the head.
Further, as a fourth means, the retinal screen is arranged so as to be able to approach or move away from the through hole.
This makes it possible to adjust the position of the image on the screen, taking into account differences in the eyeballs (axial length) of myopic or farsighted people, adults and children, and differences in the size of the eyeballs between people. .
Further, as a fifth means, the retinal screen is configured to have an eyeball-like spherical shape or a part of a spherical shape.
By configuring the screen into a spherical shape that resembles the human eye, it becomes possible to reproduce the state of image formation on the human retina. Furthermore, when the system is used as a demonstration, it is possible to give the viewer a feeling of being shown ``how the human eye sees''. Although it has a spherical shape, it is preferable to have an opening facing toward the transparent hole formed in the mask model at a position corresponding to the pupil for projecting an image onto the screen. It is preferable to form the opening to a size of about 2 mm to 8 mm, which corresponds to the pupil diameter, because the visual angle (angle of view) when the wearer wears the eyeglass-type image display device can be reproduced. The aperture does not need to be circular like a pupil, as long as the image can pass through it. Since people's eyeballs have different sizes, it is a good idea to prepare several spheres with different diameters. Further, as long as the image is projected, it does not matter if it is not in a spherical shape or in a part of the sphere; rather, it is better if there are no parts unrelated to the projection because the image becomes easier to see. It is preferable that the front part of the sphere is made of an impermeable material except for the holes, and the rear part is made of a transparent material to serve as a screen. Making the front portion opaque is advantageous because it can block unintended light from entering the screen.

Further, as a sixth means, the radius of the sphere of the retinal screen is 10 to 15 mm. The axial length of the human eyeball is approximately 24 mm to 26 mm for emmetropic adults, 20 mm for children, and approximately 30 mm for severely myopic adults. Therefore, by setting the radius of the sphere to 10 to 15 mm, it becomes possible to reproduce the conditions reflected on the retinas of wearers of various ages and with various visual acuities.
Further, as a seventh means, the radius of the sphere of the retinal screen is 20 to 60 mm. By doing so, it is possible to project a large image onto a retinal screen that is larger than the actual eyeball. Since the size is two to three times the actual size of the eyeball, the image displayed on the screen becomes larger, making it easier for observers such as the wearer and third parties to confirm the image. Here, the larger the radius of the sphere of the retinal screen (the larger it is than the actual eyeball), the larger the image can be projected, but the larger the radius of the sphere is, the larger the image can be projected. Because of the necessity, it is preferable that the size is at most three times the actual eyeball. If the eyeglass-type image display device is a retinal projection HMD, the light beam is a laser beam, so if the retinal screen is made larger with a similar shape to the eyeball, the wearer can check the image on a larger screen when wearing the device. can do. When the eyeglass-type image display device is not a retinal projection HMD, it is preferable to adjust the focus of the image projected from the eyeglass-type image display device with a lens or the like so that it is the same as that of the actual eye.
Moreover, as an eighth means, the mask model and the retinal screen have a structure that allows them to rotate independently in any direction. By providing a structure that allows the mask model to rotate, it becomes possible to reproduce when the wearer moves his or her face, such as lifting the chin or shaking the head, and by providing a structure that allows the retinal screen to rotate. This makes it possible to reproduce the situation when the wearer moves his or her eyes. By doing so, it becomes possible to reproduce how the image on the eyeglass-type image display device looks depending on the amount of rotation of the eye.

Further, as a ninth means, the retinal screen is provided with a lens for projecting an image assumed to be viewed by the wearer on the retinal screen.
When the eyeglass-type image display device is a retinal projection eyeglass-type HMD, the image is directly projected onto the retinal projection screen, so a lens is not necessarily required. In some cases, a lens is required to focus the image projected from the eyeglass-type image display device onto the retinal screen. At this time, it is preferable that the lens has an aspherical lens shape that forms an image on the retinal screen assuming an image that the wearer views on the retinal screen. Such an aspherical shape can be optically designed by a method such as ray tracing. In addition, in optical design, it is preferable that the imaging state of the lens be such that it reproduces the imaging state of light rays that have passed through the crystalline lens of the wearer, since this can better reproduce the way the wearer sees.
Moreover, as a tenth means, the lens is arranged so as to be able to approach or move away from the through hole.
This is to adjust the position of the lens and retina screen, depending on the size of the eyeballs and the degree of nearsightedness or farsightedness. Further, since the distance to the image displayed on the eyeglass-type image display device differs depending on the eyeglass-type image display device, the purpose is to correct the distance and form the image on the retinal screen. As a result, various image displays similar to those seen by the human eye can be displayed on the screen.
Furthermore, as an eleventh means, the retinal screen has an adjustment filter that projects an image viewed by the wearer that simulates the appearance of the wearer due to aging. Its feature is that it is an image projection device.
As a result, an image is projected onto the retinal screen through an adjustment filter that simulates the appearance of the wearer as he or she ages. The human crystalline lens turns yellow with age and its transmittance for short wavelength light decreases, making it difficult for blue light to reach the retina and reducing the ability to discriminate colors in the short wavelength range, resulting in images that appear yellow or brown. , it will appear reddish. By projecting an image passed through a filter that simulates the degree of discoloration due to age onto a retinal screen, it is possible to evaluate the degree of decline in color discrimination due to age when viewing the image display device. When manufacturing this adjustment filter, it is preferable not only to adjust the color tone and density but also to control the spectral transmittance.
Further, as a twelfth means, the retinal screen has an adjustment filter that projects an image viewed by the wearer that simulates the way the wearer sees due to an eye disease. Its feature is that it is an image projection device.
As a result, an image is projected onto the retinal screen through an adjustment filter that simulates the way the wearer sees due to his/her eye disease. Eye diseases include cataracts, age-related macular degeneration, tunnel vision, retinitis pigmentosa, and floaters. The targets are diseases derived from abnormalities and characteristics of. For example, in the case of cataracts, it is preferable to use a filter that simulates the appearance of cataracts by adjusting the degree of scattering. In addition, in the case of visual field narrowing, it is preferable to use a filter that reproduces the degree of visual field coverage. Here, the "adjustment filter" is preferably in the form of a plate or on a lens, but is not limited thereto. For example, in the case of floaters, the inside of a spherical retinal screen is filled with gel, transparent resin, glass, etc., and striae or partial solid matter is generated in the gel, transparent resin, glass, etc. It can be used as an adjustment filter to simulate floaters. What is filled does not necessarily have to be solid. For example, a liquid may be filled between two sheets of transparent resin to encapsulate a solid substance.

Further, as a thirteenth means, a photographing device for photographing an image reflected on the retinal screen is arranged.
This allows the screen image to be recorded, and by digitally processing the captured image, such as filtering and enlarging, it becomes possible to analyze it in detail. The photographing device only needs to be capable of recording images, and is preferably a still camera, a video camera, or the like. For example, it is preferable to place it behind the screen.
Further, as a fourteenth means, image data of an image photographed by the photographing device is outputted to a monitor.
If the image taken by the imaging device is output to the monitor, it can be checked by looking at the monitor without looking directly at the retinal screen, and it can also be enlarged to check finer details. Preferably, it is a monitor for a computer device. Computer equipment also allows for storage, modification, and analysis of the data. In this way, the image projection device is preferably a system including a photographing device, a monitor, a computer device, a program running on the computer device, and the like.
Furthermore, as a fifteenth means, the eyeglass-type image display device is a retinal projection eyeglass-type head-mounted display. The retinal projection glasses type head-mounted display is a device that projects an image directly onto the retina, so it is advantageous because it can project an image onto the retinal screen with a simple configuration.
Further, as a sixteenth means, the image projection device of any one of the first means to the twelfth means performs an evaluation for evaluating an image when the wearer wears and visually views the eyeglass-type image display device. It was designed to be a device.
By evaluating the quality of the image projected on the retinal screen (imaging condition, distortion, aberrations caused by the optical system such as chromatic aberration, image quality such as image resolution, angle of view, etc.), the eyeglass-type image display device is attached. Images visually viewed by the wearer can be objectively evaluated without the wearer wearing the wearer. Therefore, the image projection device is also an evaluation device.
Further, as a seventeenth means, the image projection device according to any one of the first means to the twelfth means is an exhibition device for confirming an image when a wearer wears the eyeglass-type image display device and visually views it. I made it so that
By having the wearer or a third party confirm the image, the image projection device can present an image that the wearer would see when wearing the eyeglass-type image display device, even when the wearer is not wearing the glasses. This display device makes it possible to visually confirm the differences between different products by replacing the plurality of eyeglass-type image display devices whose appearance you want to see and projecting images.

Furthermore, as an eighteenth means, an image viewed when the wearer wears the eyeglass-type image display device is simulated in a state where the wearer does not wear the eyeglass-type image display device. In the evaluation method for evaluating the performance of the patient, at least a through hole formed at the eye position, a first support part formed at the helix position, and a first support part formed at the external nasal position from the root of the nose to the dorsum of the nose. a mask model of a human head portion having a second support part; and a retinal screen disposed behind the through hole to visibly display a projected image, the first support part and Based on an image change of the screen obtained by supporting the glasses-type image display device by the second support part and projecting an image of the glasses-type image display device onto the screen. The optical system of the eyeglass-type image display device was evaluated.
By doing this, the image when the wearer wears the eyeglass-type image display device and views it without wearing it is evaluated, and the quality of the image projected on the retinal screen is evaluated based on the quality of the eyeglass-type image display device. It is possible to evaluate how an image looks when visually viewed while wearing an optical system, that is, a glasses-type image display device.
For example, depending on the difference (change) in the image caused by changing the eyeglass-type image display device to another type, it is possible to compare and evaluate which eyeglass-type HMD is suitable for the eye as the eyeglass-type HMD, For example, by changing the image conditions, an optimal glasses-type HMD can be selected according to the image conditions. Differences in image conditions include, for example, rotating the screen that hits the eyeball in the horizontal direction, moving the mask model that hits the head, and changing the background of the image that is projected onto glasses or the image that is projected directly onto the user's retina. For example, when changing the scenery of the external world.

Furthermore, as a nineteenth means, the evaluation is performed based on the results of analyzing image changes when the retinal screen is moved closer to or farther away from the through hole.
By doing this, it is possible to determine how images on the eyeglass-type image display device are presented to users with different eye sizes, such as adults and children, or nearsightedness and farsightedness. You can evaluate whether you can see it. Evaluation here can be made by simply looking at the image projected on the retinal screen and making a subjective judgment, or by analyzing the image projected on the retinal screen using a computer to determine whether the image is in focus. You may evaluate after analyzing the following.
Further, as a twentieth means, in the eighteenth or nineteenth means, the evaluation is performed based on the result of analyzing the image change when the screen is rotated.
Further, as a twenty-first means, in the seventeenth means to the twentieth means, the evaluation is performed based on the result of analyzing an image change when the mask model is rotated.
By doing this, it is possible to evaluate the changes in the image when the eyeballs are moved or the image changes when the face is moved. It is possible to evaluate things such as whether visibility is good when the eyes are rotated, how easy it is to get motion sickness when viewing images, and image distortion.

Further, as a twenty-second means, in the seventeenth means to twenty-first means, the image of the retinal screen is photographed by a photographing device, the image data is output to a computer device, and the result is analyzed by software of the computer device. A feature of the evaluation system is that the evaluation is performed based on the following.
As a result, it is possible to provide an evaluation system that objectively and accurately evaluates how the image viewed when wearing the eyeglass-type image display device is viewed using the software of the computer device.

In the above invention, it is possible to objectively see how an image viewed when the wearer wears the eyeglass-type image display device is seen when the wearer is not wearing the eyeglass-type image display device. Therefore, it helps developers during development. In addition, even people other than the developer can, for example, demonstrate the images that the general public would see when wearing the eyeglass-type image display device when they are not wearing it. It can make you feel that way.

1 is a perspective view illustrating how to use an image projection device, an exhibition device, or an evaluation device in Embodiment 1. FIG. FIG. 2 is a front view illustrating how to use the image projection device, exhibition device, or evaluation device in Embodiment 1. FIG. 3A is a side view and FIG. 1B is a vertical cross-sectional view at the left eye position for explaining how to use the image projection device, exhibition device, or evaluation device in Embodiment 1. FIG. (a) is a perspective view of the retinal screen device, and (b) is a longitudinal cross-sectional view. (a) is a longitudinal cross-sectional view, and (b) is a plan view of the camera-equipped retinal screen device. FIG. 2 is a schematic plan view of an image projection device, an exhibition device, or an evaluation device with a retinal screen set therein. FIG. 2 is a schematic plan view of an image projection device, an exhibition device, or an evaluation device in which a retinal screen device with a camera is set. (a) is a side view and (b) is a perspective view of the cup-shaped screen device. FIG. 2 is a schematic plan view of an image projection device, an exhibition device, or an evaluation device in which a cup-shaped screen device is set. FIG. 7 is a partially cutaway front view illustrating how to use the image projection device, exhibition device, or evaluation device in Embodiment 3; The image projection device, exhibition device, or evaluation device according to Embodiment 3, in which (a) is a side view illustrating a forward leaning posture, and (b) a side view illustrating a horizontal posture. figure. FIG. 7A is a side sectional view of an image projection device, exhibition device, or evaluation device in Embodiment 4, FIG. 12B is a plan view, and FIG. A part of the image projection device, exhibition device, or evaluation device in Embodiment 5, in which (a) is a plan view of a horizontal measurement circle, and (b) is a diagram immediately before setting the retinal screen device on the horizontal measurement circle. An explanatory diagram of the state. (a) is a front view of a retinal screen device in Embodiment 6, and (b) is a longitudinal cross-sectional view taken along line AA in (a). In Embodiment 7, (a) is a front view of a retinal screen device, and (b) is an explanatory diagram illustrating the positional relationship with the retinal screen device when a lens set is placed. 9A is a side view, FIG. 11B is a vertical cross-sectional view at the left eye position, and FIG. 7C is a plan view for explaining how to use the image projection device, exhibition device, or evaluation device in Embodiment 8. In Embodiment 8, (a) to (c) are schematic diagrams for explaining the structures of different inner shell portions of a retinal screen device. FIG. 9 is an explanatory diagram illustrating the configuration of an inner shell portion and an outer shell portion in Embodiment 8. In Embodiment 8, (a) to (c) are explanatory diagrams illustrating how an image reflected in a screen area of a retinal screen device appears when viewed through an observation window.

Hereinafter, specific embodiments of the present invention will be described based on the drawings.
(Embodiment 1)
As shown in FIGS. 1 to 3, a mask model 1 that is a part of an image projection device, display device, or evaluation device according to the first embodiment of the present invention is fixed onto a flat, hard base plate 2 as a base. has been done. The mask model 1 is manufactured using a 3D printer based on 3D data of the head. The mask model 1 of this embodiment is made of a milky-white, cloudy, light-transmitting PLA resin. The mask model 1 has a region from between the eyebrows to the nostrils (wings of the nose) formed in a belt-like and ring-like shape along the outer periphery of the head. The upper and lower end surfaces of the mask model 1 are cut to be parallel and horizontal. The mask model 1 is a mask having an uneven surface corresponding to the unevenness of the outer surface of the head (face), and is configured to have a thickness of 2.5 mm in this embodiment, as an example. An external nose portion 1a is formed at the center of the front surface of the mask model 1. At the positions of the left and right eyes of the external nose portion 1a, through holes 1b are formed as eye holes for exposing the eyeballs. A helix portion 1c, which is a part of the auricle, is formed at the left and right side positions of the mask model 1.

In the first embodiment, either the retinal screen device 3 or the retinal screen device 4 with a camera is placed on the base plate 2 inside the area surrounded by the mask model 1. The retinal screen device 3 will be described based on FIGS. 1, 2, and 4, and the retinal screen device 4 with a camera will be described based on FIGS. 3 and 5.
As shown in FIGS. 1, 2, and 4, the retinal screen device 3 includes a pseudo eyeball 5 that serves as a pseudo retina and a pseudo eyeball. Similar to the mask model 1, the pseudo eyeball 5 is manufactured based on 3D data by a 3D printer, a mold, resin molding using a simple rubber mold, or cutting a resin material. The pseudo eyeball 5 is made of a milky white, transparent PLA resin. The pseudo eyeball 5 has a substantially perfect spherical shape, and a through hole 6 resembling a circular pupil is formed in the front. The rear region facing the through hole 6 of the pseudo eyeball 5 is a screen region S imitating the retina, which is the region where the retina is formed in the human eye.
A cylindrical attachment part 7 is formed below the pseudo eyeball 5, and a female thread 8 is formed on the inner periphery of the attachment part 7. The pseudo eyeball 5 is supported on the pedestal 9 by a male screw 10 serving as a height adjusting member. The pedestal 9 is a solid body made of plastic and has a cylindrical shape. The male screw 10 is erected and fixed at the center of the upper surface of the pedestal 9. In the pseudo eyeball 5, the female screw 8 of the attachment part 7 is screwed into the male screw 10, and by relatively rotating the pseudo eyeball 5 and the male screw 10, the pseudo eyeball 5 can be rotated along the axial direction of the male screw 10. The height of the pseudo eyeball 5 can be changed (that is, it is adjustable) by moving the pseudo eyeball 5 back and forth.

As shown in FIGS. 3 and 5, like the retina screen device 3, the camera-equipped retinal screen device 4 also includes a pseudo eyeball 15 that serves as both a pseudo retina and a pseudo eyeball. Like the pseudo eyeball 5 of the retinal screen device 3, the pseudo eyeball 15 is manufactured using a 3D printer based on 3D data. The pseudo eyeball 15 is also made of a milky white, transparent PLA resin. The pseudo eyeball 15 is a hollow sphere having a substantially perfect spherical shape, and a through hole 16 imitating a circular pupil is formed in the front. The rear region facing the through hole 16 of the pseudo eyeball 15 is a screen region S imitating the retina, which is the region where the retina is formed in the human eye.
The pseudo eyeball 15 is joined to a camera support plate 17. The camera support plate 17 extends behind the pseudo eyeball 15, and a camera 19 serving as a photographing means is placed thereon via a bracket 18. The camera 19 has an angle of view that allows it to photograph the entire screen area S.
The pseudo eyeball 15 and the camera support plate 17 are supported by a support 21 as a height adjustment member with respect to a pedestal 20. The pedestal 20 is a plastic solid body having a cylindrical shape. A column support part 22 is formed at the center of the upper surface of the pedestal 20, and the column 21 is fitted into the column support part 22. A male thread 23 is formed on the outer periphery of the column 21 near the tip, and is screwed into a female thread 24 formed on the inner periphery of the column support portion 22 . Therefore, by relatively rotating the support 21 and the pedestal 20, the support 21 moves forward and backward (up and down) along the axial direction with respect to the pedestal 20, thereby adjusting the heights of the pseudo eyeball 15 and the camera 19. It is now possible.

As shown in FIGS. 1 to 3, glasses 25 are installed on the mask model 1. As shown in FIGS. The glasses 25 have a built-in retinal projection device as a retinal projection HMD on the left temple 26 side when viewed from the wearer's side. The retinal projection device is composed of a laser beam emitting device 27 built into the temple 26, a laser light source 34, and an optical fiber 32 that transmits the laser beam from the laser light source 34 to the laser beam emitting device 27. Information by laser light is emitted from the laser light emitting device 27 toward the lens 28 on the left side. A mirror 29 is disposed on the eyeball side of the left lens 28. The glasses 25 are supported by the external nose part 1a and the helix part 1c of the mask model 1 as supporting parts, and in the supported state, the left and right lenses 28 are arranged in front of the left and right through holes 1b of the mask model 1, respectively. Ru.

In such a configuration, with the glasses 25 installed (put on) on the mask model 1, either the retinal screen device 3 or the retinal screen device with camera 4 is selected to open the left side through hole 1b of the mask model 1. It is placed on the base plate 2 at the rear position. Then, by operating the retinal projection device and turning on the switch, the laser beam image is reflected by the mirror 29 and projected onto the screen area S of the pseudo eyeball 5 (see FIGS. 6 and 7). situation).
In the first embodiment, FIGS. 1, 2, and 4 show a state in which a retinal screen device 3 is installed, and FIGS. 3 and 5 show a state in which a retinal screen device 4 with a camera is installed.
As shown in FIG. 6, when a retinal screen device 3 without a camera is installed, an image is projected onto the screen area S of the pseudo eyeball 5 mainly as a display device. For example, it is possible to demonstrate how the glasses 25 equipped with the retinal projection device look. In particular, since the mask model 1 has a shape in which the upper part of the head is cut, the viewer can accurately view the screen area S of the retinal screen device 3 from the back side by looking diagonally upward and backward. Further, since the mask model 1 is integrated with the base plate 2, by rotating the base plate 2, the direction of the mask model 1 and the retinal screen device 3 can be changed while projecting an image onto the screen area S. Further, unlike the mask model 1, the retinal screen device 3 is not fixed, so the pseudo eyeball 5 can be rotated or moved back and forth, and the direction of the through hole 6 can be shifted to project onto the screen area S. You can actually check how the image changes.
Furthermore, as shown in FIG. 7, if the retinal screen device 4 is equipped with a camera, it can be actually tested as a demonstration, but the image data taken by the camera 19 is output to the computer device 30, and an enlarged image is displayed on the display screen 32. The retinal projection device can be evaluated as a result of image analysis based on magnified images. Also, the software (program) within the computer device 30 can analyze the image based on the image data and evaluate the retinal projection device as a result. That is, when the retinal screen 4 with camera is selected, it is a display device and also an evaluation device for a retinal projection device.

(Embodiment 2)
Next, Embodiment 2 will be described based on FIGS. 8(a) to 8(c) and FIG. 9. In the second embodiment, the same mask model 1, base plate 2, glasses 25, laser light source 34, etc. as in the first embodiment are used, and only the cup-shaped screen device 35 is different. Therefore, the configuration of only the cup-shaped screen device 35 will be explained in detail.
The cup-shaped screen device 35 is of a type other than an eyeball-like screen like the retinal screen device 3 or the retinal screen device 4 with a camera, and the base is located behind the left transparent hole 1b as in the first embodiment. Place it on board 2.
As shown in FIGS. 8(a) and 8(b), the cup-shaped screen device 35 of the second embodiment differs from the first embodiment in that the screen is not a pseudo eyeball, but the screen area S of the pseudo eyeballs 5 and 15. It is equipped with a cup-shaped screen 36 consisting only of a spherical crown-shaped area corresponding to the area. The cup-shaped screen 36 and the pseudo eyeball 15 are made of a milky-white and transparent PLA resin. The cup-shaped screen 36 is fixed onto a pedestal 38 by supports 37 so that the concave side faces forward. The frame 38 is a hollow rectangular parallelepiped box, and a camera 40 as a photographing means supported by a bracket 39 is disposed at the rear.The camera 40 has an angle of view that can photograph the entire area of the cup-shaped screen 36. have A shelf board 41 is disposed in a hanging manner below the top plate 38a of the pedestal 38 toward the front. A groove 42 extending back and forth is formed in a portion of the top plate 38a located above the shelf board 39. A lens slide portion 43 is formed by the top plate 38a and the shelf board 41.
A lens set 44 is arranged in the lens slide section 43. The lens set 44 includes a lens 46 resembling a crystalline lens that is detachably supported by a lens frame 45, a support 47 that supports the lens frame 45, and a rectangular slider 48 that supports the support 47. The lens frame 45 is fastened to a mounting hole 49 in which a female thread is formed in the flange portion 45a using a screw 50, and by loosening the screw 50, the lens 46 can be removed from the lens frame 45 and replaced. I can do it.
In the lens set 44, a slider 47 is placed on a shelf board 41 and accommodated in a lens slide section 43, and a support 46 extending from the top surface of the top plate 38a is movable back and forth along the longitudinal direction of the groove 42. ing. In this accommodated state, the lens 46 is arranged in front of the cup-shaped screen 36, and the optical axis direction of the lens 46 is directed toward the center position of the cup-shaped screen 36. The relative distance of the lens 46 to the cup-shaped screen 36 can be changed by moving the post 46 back and forth along the groove 42. A scale 51 is engraved to indicate the position when the lens set 44 is moved back and forth along the groove 42.

In such a configuration, the cup-shaped screen device 35 is placed on the base plate 2 at a position behind the left side through hole 1b of the mask model 1 with the glasses 25 placed on the mask model 1. Then, by operating the retinal projection device and turning on the switch, the laser beam image is reflected by the mirror 29 and projected onto the cup-shaped screen 36, which is a pseudo eyeball (the state shown in FIG. 9).
Since the cup-shaped screen device 35 of the second embodiment is equipped with a camera 40, the image data taken by the camera 40 is outputted to the computer device 30 as in the first embodiment, and an enlarged image is displayed on the display screen 31. The retinal projection device can be evaluated as a result of image analysis based on magnified images. Also, software (programs) within the computer device 30 can analyze the images and evaluate the retinal projection device as a result. In addition, by assuming differences in visual acuity and eyeball size of the user who wears the lens, it is possible to analyze the image and evaluate the retinal projection device by appropriately moving the lens set 44 and changing the conditions.

(Embodiment 3)
Next, Embodiment 3 will be described based on FIG. 10 and FIGS. 11(a) and 11(b). The third embodiment uses the same mask model 1, retinal screen device 3, glasses 25, laser light source 34, etc. as in the first embodiment. Embodiment 3 includes an elevation device 53 as a base for vertically swinging the front surface of the mask model 1. Therefore, in the third embodiment, the configuration of only the elevation device 53 will be explained in detail.
The elevating device 53 includes a pedestal 52. The top plate 52a of the pedestal 52 is formed into a flat plate and is arranged so as to slant forward (that is, the rear side is higher than the front side). A swing plate 54 serving as a base on which the mask model 1 is placed is installed on the top plate 52a. The swing plate 54 is a wide plate member configured in an L-shape when viewed from the side. The swing plate 54 is connected by a hinge 55 to a rear plate 56 fixed to the rear of the top plate 52a of the pedestal 52. The swing plate 54 is supported by a rear plate 56 so as to be swingable in the vertical direction about a hinge 55.
A jack device 57 is disposed on the top plate 52a of the pedestal 52 on the inside front side of the swing plate 54. In the third embodiment, the jack device 57 is of a pantograph type, and a link mechanism constituted by two lower arms 58 and two upper arms 59 is screwed into a female thread (not shown) by rotating a threaded rod 60. The configuration is such that the left and right connecting portions 61 of the link mechanism are brought closer and separated depending on the relationship. The threaded rod 60 is operated from the outside of the swing plate 54 by a handle 62. The jack device 57 uses a push plate 64 to push the swing plate 54 upward with respect to the seat plate 63.
The mask model 1 is placed on such an elevating device 53, the retinal screen device 3 is installed behind the mask model 1, and the elevating device 53 is operated with the user wearing glasses 25. In the default state in which the jack device 57 is at its lowest position, the mask model 1 is placed so as to face slightly below the horizontal direction, as shown in FIG. 11(a). The operator operates the jack device 57 by rotating the handle 62 and gradually directs the mask model 1 upward. FIG. 11(b) shows a state in which it is oriented in a substantially horizontal direction. By operating the jack device 57, it can be placed in a position facing upwards from the horizontal direction.
In this way, by operating the jack device 57 with the handle 62, the front surface of the mask model 1 can be vertically swung, and by such swiveling, the external world image (that is, the background of the projected image) changes. images) can be analyzed to evaluate the retinal projection device. The amount of rocking can be measured by the number of rotations of the handle 62, the angle of the upper surface of the rocking plate 54, the distance between the rocking plate 54 and the top plate 52a of the pedestal 52, and the like.

(Embodiment 4)
Next, Embodiment 4 will be described based on FIGS. 12(a) to 12(c). The fourth embodiment uses the same mask model 1, camera-equipped retinal screen device 4, glasses 25, etc. as in the first embodiment. In the fourth embodiment, a rotation device 71 for horizontally rotating the front surface of the mask model 1 is provided as a base. Therefore, in the fourth embodiment, the configuration of only the rotation device 71 will be explained in detail.
The rotation device 71 includes a pedestal 72. As shown in FIG. 12(c), a projection 73 that projects upward is formed at the center of the top plate 72a of the pedestal 72. As shown in FIG. 12(b), in the fourth embodiment, the mask model 1 is fixed on a circular base plate 74. A recess 75 is formed at the center back surface position of the base plate 74. The base plate 74 is placed on the pedestal 72 so as to be rotatable in the circumferential direction with the protrusion 73 fitted into the recess 75 with this portion as the center of rotation. The back surface of the base plate 74 and the top plate 72a of the pedestal 72 are constructed smoothly, and the base plate 74 can be rotated without stress. A scale 76 indicating the position of the mask model 1 is printed on the top plate 72a of the pedestal 72 at a position adjacent to the front surface of the base plate 74. A dot 77 serving as a mark is printed on the upper surface of the base plate 74 at the default position of the mask model 1, that is, the position directly facing the front. The dot 77 is arranged in the direction of the center position of the scale 76 at the default position.
The mask model 1 is placed on such a rotating device 71, the retinal screen device 4 with a camera is installed behind the mask model 1, and the rotating device 71 is operated with the user wearing glasses 25. . By rotating the base plate 74, the direction of the mask model 1 placed in the default position can be changed horizontally, and by rotating in this way, the external world image changes when the neck is rotated horizontally. (ie, the background image of the projected image) can be analyzed to evaluate the retinal projection device. The amount of rotation of the mask model 1 can be measured by the displacement of the dot 77 position with respect to the scale 76.

(Embodiment 5)
Next, Embodiment 5 will be described based on FIGS. 13(a) and 13(b).
In the fourth embodiment, the mask model 1 and the retinal screen device 3 rotate together, but the retinal screen device 3 may be configured to rotate independently of the mask model 1. In FIG. 13(a), the installation position of the retinal screen device 3 is determined in advance on a table on which a screen such as the base plate 2, 74 or the swing plate 54 is installed, and a protrusion 81 is formed at that position. . A small hole 82 (that is, a recess) into which the protrusion 81 is inserted is formed at the center of the bottom surface of the pedestal 9 of the retinal screen device 3 . As shown in FIG. 13(b), by aligning the small hole 82 and the projection 81 and setting the retinal screen device 3, the retinal screen device 3 is moved in the circumferential direction around the engaging position of the projection 81 and the small hole 82. This means that it can be rotated. A horizontal measurement circle 83 having a diameter larger than the diameter of the pedestal 9 is printed around the protrusion 81 on the table. A scale is formed around the horizontal measurement circle 83, and the retinal screen device 3 can determine which direction it is facing from this scale. If such a retinal screen device 3 is used, the retinal projection device analyzes the changing external world image (that is, the background image of the projected image) when the user follows the surrounding scenery with only his eyes without turning his head. can be evaluated.

(Embodiment 6)
Next, a sixth embodiment will be described based on FIG. 14. Embodiment 6 is a variation of Embodiment 1, and uses a retinal screen device 91 having a different configuration in place of retinal screen device 3 of Embodiment 1. The retinal screen device 91 includes a pseudo eyeball 92 that serves as a pseudo retina and a pseudo eyeball. Similar to the mask model 1, the pseudo eyeball 92 is manufactured using a 3D printer based on 3D data. The pseudo eyeball 92 is made of a milky white, transparent PLA resin. The pseudo eyeball 92 has a true spherical shape, and a through hole 93 resembling a circular pupil is formed in the front. The rear region facing the through hole 93 of the pseudo eyeball 92 is a screen region S imitating the retina, which is the region where the retina is formed in the human eye. The pseudo eyeball 92 is supported by a support device 95. The support device 95 includes a pedestal 96, a column 97 erected on the pedestal 96, and a support fitting 98. The pedestal 99 is a solid body made of plastic and has a cylindrical shape. A male screw 97a is formed on the outer periphery of the support column 97 near the bottom, and is screwed into a female screw 96a on the pedestal 96 side. Therefore, by relatively rotating the frame 99 and the support column 97, the support column 97 moves up and down (that is, it is adjustable). The support fitting 98 has a cap part 98a fitted to the upper end of the support column 97, an arm part 98b extending upward from the upper part of the cap part 98a in a substantially U-shape, and a pair of arms protruding inward from the left and right ends of the arm part 98b. It is composed of a protrusion 98c. The protrusion 98c is engaged in a recess (not shown) formed at a diameter position on the side surface of the pseudo eyeball 92. The protrusion 98c holds the pseudo eyeball 92 in a biased state due to the elasticity of the arm 98b, and the pseudo eyeball 92 supported by the protrusion 98c is rotatably supported in the axial direction of the protrusion 98c. be done. The protrusion 98c holds the pseudo eyeball 92 with sufficient urging force, and the pseudo eyeball 5 can be rotated in the vertical direction (elevating direction) and held at any angle.
With this configuration, various positional changes can be made, such as elevating the pseudo eyeball 5, changing the height of the pseudo eyeball 92, and changing the horizontal direction of the through hole 93 of the pseudo eyeball 92. This makes it possible to freely change the direction of the through hole 93 of the pseudo eyeball 92, making it easy to reproduce various viewing conditions, and to actually inspect changes in various images projected on the screen area S. be able to.

(Embodiment 7)
In the second embodiment described above, the lens set 44 is disposed in front of the cup-shaped screen device 35, and the pseudo eyeball is not used. However, as shown in FIGS. A model in which a lens is set on a screen device shaped like a pseudo-eyeball may also be used.
In the retinal screen device 101 shown in FIGS. 15(a) and 15(b), a pseudo eyeball 102 serving as both a pseudo retina and a pseudo eyeball is supported by left and right columns 104 of a table 103. The pseudo eyeball 102 has a true spherical shape, and a through hole 105 resembling a circular pupil is formed in the front. The rear area facing the through hole 105 of the pseudo eyeball 102 is a screen area S that imitates the retina, which is the area where the retina is formed in the human eye. A slit 106 is formed below the center of the through hole 105 . A lens set 109 is combined with the retinal screen device 101. The lens set 109 includes a lens 110 imitating a crystalline lens, a wire 111 that supports the lens 110, and a support plate 112. The vertical position of the lens 110 is adjusted so as to match the through hole 105 when the support plate 112 is placed on the table 103. There are three types of positional relationships between the lens 110 and the pseudo eyeball 102: "assimilated with the pseudo eyeball (same position as the actual eyeball)", "outside the pseudo eyeball", and "inside the pseudo eyeball" is possible. By arranging a photographing device such as a camera behind such a retinal screen device 101, different images can be obtained depending on the position of the lens.
With such a configuration, it is possible to move the lens in a way that more closely simulates the actual eye, making it easy to reproduce various visual conditions, and making it possible to actually inspect changes in various images projected onto the screen area S. can.

(Embodiment 8)
Next, Embodiment 8 will be described based on FIGS. 16(a) to (c), FIGS. 17(a) to (c), etc. Embodiment 8 is a variation of Embodiment 1 and uses the same base plate 2, glasses 25, laser light source 34, etc. as Embodiment 1, but differs in the configurations of mask model 121 and retinal screen device 123. Therefore, the configurations of only the mask model 123 and the retinal screen device 123 will be described in detail below.
As shown in FIGS. 16(a) to 16(c), the mask model 121 of the eighth embodiment has an observation window 122 at the back of the head. The mask model 121 of the eighth embodiment is made of the same material as the mask model 1 of the first embodiment, and is cut so that the upper and lower end surfaces are parallel and horizontal. Similar to the mask model 1 of Embodiment 1, the mask model 121 is formed with an external nose portion 121a, a through hole 121b, and an ear helix portion 121c. The through hole 121b of the mask model 121 is formed into a circular shape that roughly follows the outline of the eye socket without upper and lower eyelids. Although not shown in the mask model 121, eyelids may be formed. The mask model 121 is cut at a position behind both helix portions 121c, and a light shielding wall 125 made of a non-transparent material is provided. A horizontally long rectangular observation window 122 is formed in the light shielding wall 125 . Scales 127 are engraved at four positions on the light shielding wall 125 adjacent to the edge of the observation window 122. The scale 127 is used to objectively compare the difference in appearance when the retinal screen device 123 is moved or replaced. A light-shielding roof portion 128 is installed on the upper surface of the mask model 121 to shield the inside of the mask model 121 from light.

In the eighth embodiment, a plurality of types of retinal screen devices 123 can be used depending on the inner shell portions 135A to 135C shown in FIG. 17(a). The retinal screen device 123 includes a pseudo eyeball 130 similarly to the retinal screen device 3 of the first embodiment. The pseudo eyeball 130 is a hollow sphere having a substantially perfect spherical shape, and has a through hole 131 resembling a circular pupil formed in the front. The rear region facing the through hole 131 of the pseudo eyeball 130 is a screen region S imitating the retina, which is the region where the retina is formed in the human eye. Similar to the first embodiment, the pseudo eyeball 130 of the eighth embodiment is also supported by a male screw 133 as a height adjustment member with respect to the pedestal 132.
The pseudo eyeball 130 has the same structure as the pseudo eyeball 5 and has an outer shell part 134 made of a milky-white, cloudy, light-transmitting PLA resin, and a sphere fitted into the outer shell part 134, which has a transparent filter as an adjustment filter. It has a double structure with an inner shell part 135. As shown in FIG. 18, the outer shell part 134 is divided into two halves in the front and back in the polar direction, with the upper and lower poles being the poles when the through hole 131 is placed in the front, and the outer shell part 134 is formed by joining them. Complete. The hemisphere disposed on the front side is referred to as a front outer shell portion 134a, and the hemisphere disposed on the rear side is referred to as a rear outer shell portion 134b. The pseudo eyeball 130 can display only the light that has passed through the through hole 131 on the screen by reflecting, absorbing, and scattering the front outer shell part 134a by painting or blocking light by making it made of another opaque material. It becomes like this. Since the rear outer shell part 134b acts as a screen, it has a certain degree of transparency, and the transmitted image can be viewed or photographed from the rear side. It is best to paint the area around the through hole 131 black or brown to represent an iris, as this can prevent unintentional stray light from entering.
The inner shell part 135 is divided into two hemispherical shapes corresponding to the hemispherical shape of the outer shell part 134, and is disposed in close contact with the inner peripheral surface of the outer shell part 134.
As shown in FIGS. 17(a) to 17(c), in the eighth embodiment, three types of inner shell portions 135A to 135C are prepared.
The inner shell portion 135A shown in FIG. 17(a) is made by solidifying highly transparent urethane under conditions such that linear portions with different refractive indexes (referred to as "striae") are scattered at points during polymerization. This is a filter that simulates the appearance of floaters. The inner shell part 135B shown in FIG. 17(b) is made of transparent polycarbonate, and the area facing the through hole 131 is colored pale yellow to imitate the color of the crystalline lens of a 20-year-old human. The inner shell portion 135C shown in FIG. 17(c) is made of transparent polycarbonate, and the area facing the through hole 131 is colored brown to imitate the color of the crystalline lens of a 60-year-old human and is treated to have a slightly frosted glass appearance. The appearance of cataracts has been reproduced.

With this configuration, the image projection device can obtain the following functions and effects.
First, since the mask model 121 is covered with the light-shielding wall 125 and the light-shielding roof 128, light entering into the mask model 121 is suppressed. Therefore, when looking through the observation window 122, the screen area S of the pseudo eyeball 130 is displayed particularly brightly. 19(a) to (c) show the screen area S of the pseudo eyeball 130 visually observed from the observation window 122 in a state where the glasses 25, which are retinal projection HMDs, are installed (hanged) on the mask model 121 of Embodiment 8. This figure shows an example of what happens when you do this.
When a rectangular image is projected from the glasses 25, if the projected image is correctly projected onto the retinal screen, it will look like the one shown in FIG. If the position is shifted, that is, if the optical axis of the image is shifted, the image will be deformed as shown in FIG. 19(b). Using such evaluation, it is possible to adjust the retinal projection HMD so that it looks correct.
In addition, the evaluation of the image projected on the retinal screen is not limited to deformation. For example, if the inner shell part 135A shown in FIG. 17(a) is used, the image projected on the retinal screen will be evaluated as shown in FIG. Therefore, it is possible to evaluate how a wearer with eye floaters sees when wearing the glasses 25. Furthermore, if the inner shell portions 135B and 135C in FIG. 17(b) and FIG. 17(c) are used interchangeably, changes in visual appearance due to aging can be evaluated. In this way, by evaluating the eyeball screen by replacing it with various wearers in mind, it can be used to develop eyeglass-type image display devices that respond to differences in vision due to aging and eye diseases. can. In addition, if used as an exhibit, the glasses-type image display device can show how the glasses-type image display device is affected by aging and eye conditions (disease conditions) to the wearer and third parties without actually wearing the glasses-type image display device. It is possible to show whether the appearance of the display device changes, and it can be used to make decisions regarding purchasing.

The embodiments described above are merely described as specific embodiments for illustrating the principles and concepts of the present invention. That is, the present invention is not limited to the above embodiments. The present invention can also be embodied in the following modified aspects, for example.
- The shape of the mask model 1 in each of the above embodiments is an example, and the mask model may have another shape. For example, other organs (such as a mouth) may be included. Also, for example, the entire head may be present. Further, for example, there may be no position behind the helix portion of the head.
・The external nasal part 1a, eye hole 1b, ear helix 1c, etc. of the above mask model 1 have a pseudo appearance to resemble those organs of a real person. This is because the mask model was created based on the model. Humans have a brain function that recognizes a face as a ``human face'' if there are depressions or projections corresponding to the eyes, nose, or ears. Therefore, if it is known or is created with the assumption that it is an external nasal part, an eye opening, or an ear helix, it corresponds to an external nasal part, an eye opening, or an auditory helix, even if it is not a pseudo one.
- Although the glasses 25 are equipped with a retinal projection HMD, they may also be of a model in which the user actively views virtual images as an HMD. For example, by projecting a virtual image (image) onto a spectacle lens, or by projecting a virtual image (image) onto a transparent plate that serves as a screen overlaid on a spectacle lens, the spectacle wearer can actively view the image. This is the case.
- In the above, the retinal screen device 3, the retinal screen device 4 with camera, the cup-shaped screen device 35, the retinal screen device 91, and the retinal screen device 101 are all placed in one eye (left eye), but even if they are placed in both eyes, only the right eye is used. It may be placed in
- The retinal screen device 3, camera-equipped retinal screen device 4, cup-shaped screen device 35, retinal screen device 91, and retinal screen device 101 of the first to seventh embodiments are arranged behind the mask model 1 in a mutually interchangeable manner. You can also do this.
- Although the camera 40 is provided in the cup-shaped screen device 35 of the second embodiment, the camera 40 may not be provided.
・Materials other than those listed above may be used. The mask model 1 may be molded using a mold. The same applies to the pseudo eyeballs 5 and 15 and the cup-shaped screen 36.
- In the second embodiment, the lens 46 of the lens set 44 is replaced to adjust the lens power according to the user's visual acuity, but the lens set 44 itself may be replaceable.
- Although the cup-shaped screen 36 is curved (coronal shape) in accordance with the shape of the retina, it may be a flat surface instead of such a curved surface. This is because the computer device 30 can correct the image to a curved image that actually appears on the retina.
- The retinal screen device 4 with camera, the cup-shaped screen device 35, the retinal screen device 91, and the retinal screen device 101 may be used in the third and fourth embodiments. Further, the retinal screen device 3, the retinal screen device 91, and the retinal screen device 101 may be used in the fourth embodiment. In other words, the user is free to replace and use various types of screen devices as appropriate.
- In Embodiment 8, the inner shell portion 135 of the double-structured pseudo eyeball 130 may be provided with various patterns and may be used interchangeably. For example, symptoms of floaters such as the inner shell portion 135A may be combined with appearance due to aging such as the inner shell portions 135B and 135C. For example, although the inner shell portion 135C is treated to have a slightly frosted glass appearance to simulate the symptoms of cataract, it is also possible to provide various cloudy states without this treatment or in the case where the treatment is applied.
The present invention is not limited to the configuration described in the embodiments described above. The components of each of the embodiments and modifications described above may be arbitrarily selected and combined. Also, any component of each embodiment or modification, any component described in the means for solving the invention, or a component that embodies any component described in the means for solving the invention. It may be configured in any combination. The applicant intends to obtain rights to these matters through amendments to the application or divisional applications.
In addition, the applicant intends to obtain rights to the entire design or partial design by filing a conversion application to a design application. Although the drawing depicts the entire device using solid lines, the drawing includes not only the overall design but also the partial design claimed for some parts of the device. For example, it is a drawing that not only includes some members of the device as a partial design, but also includes some parts of the device as a partial design regardless of the members. The part of the device may be a part of the device or a part of the device.

DESCRIPTION OF SYMBOLS 1...Mask model, 1a...Second support part formed at the external nose position, 1b...Through hole, 1c...First support part formed at the helix position, 5, 15, 92, 102...Screen 25...glasses, 36...a cup-shaped screen as a screen.

Claims (22)

In an image projection device for projecting an image assuming the image when a wearer wears a glasses-type image display device and visually views the device,
A person who has at least a through hole formed at the eye position, a first support part formed at the helix position, and a second support part formed at the external nose position from the root of the nose to the dorsum of the nose. A mask model of the head part of
a retinal screen disposed behind the through hole and visibly displaying the projected image;
An image projection device characterized in that the glasses-type image display device is supported by the first support portion and the second support portion. 2. The image projection apparatus according to claim 1, wherein the mask model has only a band-shaped region including the through hole, the first support section, and the second support section. 3. The image projection device according to claim 1, wherein a part of the mask model has an observation window through which an external observer can view the image projected onto the retinal screen. The image projection device according to any one of claims 1 to 3, wherein the retinal screen is arranged so as to be able to approach or move away from the through hole. The image projection device according to any one of claims 1 to 4, wherein the retinal screen has a spherical shape like an eyeball or a part of a spherical shape. The image projection device according to claim 5, wherein the radius of the sphere of the retinal screen is 10 to 15 mm. The image projection device according to claim 5, wherein the radius of the sphere of the retinal screen is 20 to 60 mm. The image projection apparatus according to any one of claims 1 to 7, wherein the mask model and the retinal screen have a structure that allows each to rotate independently in any direction. The image projection device according to any one of claims 1 to 8, further comprising a lens for projecting onto the retinal screen an image viewed by the wearer. The image projection apparatus according to claim 9, wherein the lens is arranged so as to be able to approach or move away from the through hole. 11. The retinal screen has an adjustment filter that projects an image viewed by the wearer that simulates the wearer's appearance due to aging. The image projection device according to any one of the above. 12. The retinal screen has an adjustment filter that projects an image viewed by the wearer that simulates the way the wearer sees due to an eye disease. The image projection device according to any one of the above. The image projection device according to any one of claims 1 to 12, further comprising a photographing device for photographing an image reflected on the retinal screen. 14. The image projection device according to claim 13, wherein image data of an image photographed by the photographing device is output to a video display monitor. The image projection apparatus according to claim 1, wherein the eyeglass-type image display apparatus is a retinal projection eyeglass-type head-mounted display. The image projection device according to any one of claims 1 to 15 is an evaluation device for evaluating an image when the eyeglass-type image display device is worn and viewed by a wearer. Evaluation device. The image projection device according to any one of claims 1 to 15 is an exhibition device for confirming an image when a wearer wears a glasses-type image display device and visually views the image projection device. Exhibition equipment. An evaluation method for evaluating an image obtained when a wearer wears a glasses-type image display device and visually views the image while the wearer is not wearing the glasses-type image display device, simulating a wearing state. In,
A person who has at least a through hole formed at the eye position, a first support part formed at the helix position, and a second support part formed at the external nose position from the root of the nose to the dorsum of the nose. A mask model of the head part of
a retinal screen disposed behind the through hole and visibly displaying the projected image;
The eyeglass-type image display device is supported by the first support portion and the second support portion, and the image obtained by projecting the image of the eyeglass-type image display device onto the retinal screen is obtained. An evaluation method comprising evaluating an optical system of the eyeglass-type image display device based on a change in the image on the retinal screen. 19. The evaluation method according to claim 18, wherein the evaluation is performed based on a result of analyzing image changes when the retinal screen is moved toward or away from the through-hole. 20. The evaluation method according to claim 18 or 19, wherein the evaluation is performed based on a result of analyzing an image change when the retinal screen is rotated. 21. The evaluation method according to claim 18 , wherein the evaluation is performed based on the results of analyzing image changes when the mask model is rotated. 21. The image of the retinal screen is taken by a photographing device, the image data is output to a computer device, and the evaluation is performed based on the result of analysis by software of the computer device. An evaluation system using the evaluation method described in any of the above.

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