JP7051637B2 - 3D image imaging device - Google Patents

Description

The present invention relates to a stereoscopic image imaging device that forms a stereoscopic image in the air.

As a device for forming a stereoscopic image using light (scattered light) emitted from the surface of an object, for example, there is a stereoscopic image forming apparatus (optical imaging apparatus) described in Patent Document 1.
This imaging device is formed by arranging a plurality of and strip-shaped light reflecting surfaces composed of metal reflecting surfaces (mirror surfaces) vertically in the thickness direction of the two transparent plates at a constant pitch. One surface of the first and second optical control panels having the first and second optical control panels so that the light reflecting surfaces of the first and second optical control panels are orthogonal to each other in a plan view. The sides are facing each other and are in close contact with each other.

International Publication No. 2009/131128

In manufacturing the above-mentioned first and second optical control panels, a plate-shaped transparent synthetic resin plate or glass plate (hereinafter, also referred to as “transparent plate”) having a certain thickness in which a metal reflecting surface is formed on one side is used. A plurality of sheets are laminated so that the metal reflecting surface is arranged on one side to produce a laminated body, and the laminated body is cut out so that a cut surface perpendicular to each metal reflecting surface is formed.
For this reason, a large vapor deposition furnace is required for the work of forming a metal reflective surface on a transparent plate, and one or a small number of transparent plates are placed in the vapor deposition furnace to be degassed to create a high vacuum, and then a vapor deposition process is performed. And
It is necessary to repeat the work of opening to atmospheric pressure and taking out the vapor-filmed transparent plate more than 100 times.
It was an extremely laborious and time-consuming task. Further, the transparent plates vapor-deposited with metal are laminated to form a laminated body, and the work of cutting with an extremely thin predetermined thickness is performed to cut out the first and second optical control panels from the laminated body, and further, these first. Since it is necessary to polish the cut surface (both sides) of the second optical control panel, workability and manufacturing efficiency are poor.
Further, since the plurality of metal reflecting surfaces of the first and second optical control panels are arranged so as to be linear (parallel) and orthogonal to each other in a plan view, the arrangement interval (pitch) of the metal reflecting surfaces is set. Due to the limitation, the viewing angle (imaging range) was also limited, and the brightness and sharpness of the stereoscopic image were also limited.
Further, in Patent Document 1, the first and second optical control panels having a groove having a triangular cross section are made of transparent resin, and the first and second optical control panels are the light reflecting surface (vertical surface of the groove). It is also described that the optical imaging apparatus is provided in close contact with each other so as to be orthogonal to each other. However, since total reflection is used as the light reflecting surface, the aspect ratio of the groove is small and a bright imaging can be obtained. There was the problem that it was difficult.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a stereoscopic image imaging apparatus having a wide viewing angle, capable of obtaining a bright and clear stereoscopic image with few ghosts, and relatively easy to manufacture. And.

The stereoscopic image forming apparatus according to the first invention according to the above object is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. The imaging means having a plurality of second vertical light reflecting portions concentrically arranged so as to intersect the first vertical light reflecting portion with X1 as the center, and one side and the other side of the imaging means. The light is provided with a light-shielding means having first and second polarizing elements arranged opposite to each other, and the light transmitted through the first polarizing element and reflected once by the first and second vertical light reflecting portions is emitted. The light that passes through the second polarizing element to form a stereoscopic image in the air, passes through the first polarizing element, and is reflected once only by the first or second vertical light reflecting unit is It is shielded by the second polarizing element.

Here, the imaging means (same in the first to third inventions) may be any shape as long as the final shape is an annular shape or a shape using a part of the annular shape in a plan view, and the outer shape at the manufacturing stage is an annular shape or a circular shape. It may be in shape or any other shape. The shape using a part of the ring includes not only a fan shape but also a rectangular shape.
Further, in the imaging means, the first vertical light reflecting portion (hereinafter, also referred to as a radial light reflecting portion) radially arranged around the reference point X is formed linearly, whereas the imaging means is concentric. The second vertical light reflecting portion (hereinafter, also referred to as a concentric light reflecting portion) to be arranged is curved along the concentric circle centered on the reference point X1, but the first vertical light reflecting portion is viewed in a plan view. At the point where the portion and the second vertical light reflecting portion intersect, they are orthogonal to each other. Therefore, in the first and second light control panels (or light control units) in which a plurality of linear band-shaped light reflecting surfaces are arranged in parallel as in the conventional case, the light reflecting surfaces are orthogonal to each other in a plan view. Therefore, a stereoscopic image can be formed in the same manner as the stereoscopic image imaging device having (or being integrated with) a gap or without a gap.

As the first vertical light reflecting portion, a portion in which a plurality of grooves are formed radially at intervals on one side of the transparent plate material and the vertical surface thereof is a mirror surface is preferably used. Further, as the second vertical light reflecting portion, a portion in which a plurality of grooves are formed concentrically on one side of the transparent plate material at intervals and the vertical surface thereof is a mirror surface is preferably used. These can be manufactured from transparent resin by press molding, injection molding, roll molding and the like. Then, the two transparent plate materials can be joined together with a transparent adhesive or the like to form a transparent flat plate. The grooves in which the first and second vertical light reflecting portions are formed are formed on both sides (front and back) of one transparent plate material at the same time, instead of being separately molded on one side (front surface) of the two transparent plate materials. It may be molded. At this time, a vertical plane can be easily obtained by forming the cross-sectional shape of the groove into a rectangular shape, a right-angled triangular shape, a trapezoidal shape, or the like.
In particular, when the cross-sectional shape of the groove is formed into a right-angled triangle shape or a trapezoidal shape, the groove becomes wider on the open side, so that stamping or demolding becomes easy and productivity is excellent. Further, when the cross-sectional shape of the groove is rectangular, the vertical surfaces on both sides can be used as a light reflecting portion (hereinafter, the first and second vertical light reflecting portions are collectively referred to as a light reflecting portion).
The two types of light reflecting parts, the radial light reflecting part and the concentric light reflecting part, are arranged so as to be overlapped on the upper and lower sides (one side and the other side) in the plate thickness direction of the image forming means formed in the shape of a transparent flat plate. You just have to.

Further, the surface of the transparent plate to be manufactured is smoothed by mirror-polishing the surface of the mold used for molding to the extent that light is not diffusely reflected. Then, after molding with a mold, the vertical surface of the groove is selectively sputtered, metal vaporized, sprayed with metal fine particles, or irradiated with an ion beam, or the metal particles are irradiated by other methods to obtain a metal reflective surface (mirror surface). Can be used as a light reflecting part. In addition, instead of forming the second vertical light reflecting portion concentrically, one or a plurality of grooves may be formed in a spiral shape. Further, instead of forming a groove on the surface of the transparent plate material by molding, the surface of the transparent plate material can be scraped to form a groove.

The stereoscopic image forming apparatus according to the second invention according to the above object is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. The imaging means having a plurality of second vertical light reflecting portions concentrically arranged so as to intersect the first vertical light reflecting portion with X1 as the center, and one side and the other side of the imaging means. The light is provided with a light-shielding means having first and second polarizing elements arranged opposite to each other, and the light transmitted through the second polarizing element and reflected once by the second and first vertical light reflecting portions is emitted. The light transmitted through the first polarizing element to form a stereoscopic image in the air, transmitted through the second polarizing element, and reflected once only by the first or second vertical light reflecting unit is It is shielded by the first polarizing element.

Here, the light-shielding means in the stereoscopic image imaging apparatus according to the first and second inventions is the light reflected once only by the first or second vertical light reflecting unit by the combination of the first and second polarizing elements. Anything that can shield the light is sufficient. As the first and second splitters, linear splitters that convert natural light (non-polarized) into linearly polarized light are preferably used. Specifically, since the vibration direction of the light reflected once only by the first or second vertical light reflecting portion is stored with almost no change before and after the reflection, the light transmitted through the first polarizing element is stored. The first and second substituents may be selected and arranged so that the vibration direction of the light is orthogonal to the vibration direction of the light transmitted through the second polarizing element.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element has a plurality of first reflection axes or first absorption axes arranged in parallel, and the second polarization is provided. It is preferable that the child has a plurality of second reflection axes or second absorption axes arranged in parallel so as to be orthogonal to the first reflection axis or the first absorption axis in a plan view.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element is a first reflection axis or a first radial reflecting axis centered on a reference point X2 that overlaps with the reference point X in a plan view. A concentric circle having one absorption axis and intersecting the first reflection axis or the first absorption axis with a reference point X3 overlapping the reference point X in a plan view. It is preferable to have a second reflection axis or a second absorption axis in the shape.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element is a concentric first reflection axis or a concentric first reflection axis centered on a reference point X2 that overlaps with the reference point X in a plan view. The second absorber has a first absorption axis and intersects the first reflection axis or the first absorption axis with a reference point X3 overlapping the reference point X in a plan view. It is preferable to have a second radial reflection axis or a second absorption axis.

The stereoscopic image forming apparatus according to the third invention according to the above object is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. On one side or the other side of the imaging means having a plurality of second vertical light reflecting portions concentrically arranged intersecting the first vertical light reflecting portion with X1 as the center. The light-shielding means includes a light-shielding means having an arranged liquid crystal shutter, and the light-shielding means selectively shields a part of the light incident from the image-forming means side and passing through the image-forming means with the liquid crystal shutter, or A part of the light incident on the image forming means from the liquid crystal shutter side is selectively shielded by the liquid crystal shutter.

In the three-dimensional image imaging device according to the third aspect of the invention, the light-shielding means has a detecting means for detecting the position of an observer who observes the stereoscopic image formed by the imaging means, and the detecting means detects the position. It is preferable to determine the area to be shielded according to the position of the observer and selectively shield the area with the liquid crystal shutter.

In the stereoscopic image imaging apparatus according to the first to third inventions, it is preferable that the first and second vertical light reflecting portions are metal reflecting surfaces, respectively.
Here, as a method of forming a metal reflecting surface (mirror surface), in addition to directly performing sputtering, metal vapor deposition, spraying of metal fine particles, irradiation of an ion beam, application of a metal paste, etc. on the vertical surface of the groove, sputtering or A resin film having a reflective film formed by metal vapor deposition or the like may be attached to the vertical surface of the groove. In particular, when sputtering, metal vapor deposition, spraying of metal fine particles, irradiation of ion beams, etc. are performed directly on the vertical surface of the groove with a triangular cross section, the inclined surface of the groove is a flat surface or a concave surface whose cross section is recessed inward. , It is preferable to include a polygonal surface (consisting of a part of a polygon). As a result, it is possible to prevent the formation of a metal reflecting surface on the inclined surface of the groove as much as possible.

In the stereoscopic image imaging apparatus according to the first to third inventions, the imaging means has a flat plate shape on both surfaces, and the materials other than the first and second vertical light reflecting portions have a refractive index. Is preferably made of two or more kinds of transparent resins having the same or similar to each other.
Here, the refractive index of the other transparent resin is 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, still more preferably 0.95 times) with respect to the refractive index of one transparent resin. It is preferably in the range of ~ 1.05 times).

In the stereoscopic image imaging apparatus according to the first to third inventions, the imaging means has a plurality of radial light reflecting portions and concentric light reflecting portions, so that the imaging range is wide and the arrangement intervals of the light reflecting portions ( The pitch) can be made fine and many light reflecting parts can be densely arranged, the viewing angle can be widened, and a bright stereoscopic image can be obtained. In particular, the three-dimensional image imaging apparatus according to the first and second inventions includes light-shielding means having first and second polarizing elements arranged on one side and the other side of the imaging means, and reflects radial light. Ghosts can be eliminated by blocking the light that is reflected once only by the part or the concentric light reflecting part and does not participate in the image formation of the stereoscopic image, and an extremely clear stereoscopic image is formed to improve visibility. Can be made to. Further, the stereoscopic image forming apparatus according to the third invention includes a light-shielding means having a liquid crystal shutter arranged on one side or the other side of the forming means, and is a region through which light that deteriorates the visibility of the stereoscopic image is transmitted. By selectively shielding the image, ghosts can be reduced and a clear stereoscopic image can be formed.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element has a plurality of first reflection axes or first absorption axes arranged in parallel, and the second polarizing element is used. When having a plurality of second reflection axes or second absorption axes arranged in parallel with the first reflection axis or the first absorption axis in a plan view, the radial light reflection unit of the imaging means. Alternatively, the light reflected once only by the concentric light reflecting portion can be effectively shielded by the combination of the first and second polarizing elements to prevent the generation of ghosts.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element has a radial first reflection axis or a first absorption axis, and the second polarizing element is concentric. When having a second reflection axis or a second absorption axis, both are at the point where the first reflection axis or the first absorption axis and the second reflection axis or the second absorption axis intersect in a plan view. Since they are orthogonal to each other, the light reflected once only by the radial light reflecting portion or the concentric light reflecting portion of the imaging means is effectively shielded by the combination of the first and second polarizing elements to prevent the generation of ghosts. be able to.

In the stereoscopic image imaging apparatus according to the first and second inventions, the first polarizing element has a concentric first reflection axis or a first absorption axis, and the second polarizing element is radial. When having a second reflection axis or a second absorption axis, both are at the point where the first reflection axis or the first absorption axis and the second reflection axis or the second absorption axis intersect in a plan view. Since they are orthogonal to each other, the light reflected once only by the radial light reflecting portion or the concentric light reflecting portion of the imaging means is effectively shielded by the combination of the first and second polarizing elements to prevent the generation of ghosts. be able to.

In the stereoscopic image imaging apparatus according to the third aspect of the invention, the shading means has a detecting means for detecting the position of the observer who observes the stereoscopic image formed by the imaging means, and the observer detected by the detecting means. When the area to be shielded is determined according to the position of the above and selectively shielded by the liquid crystal shutter, it is possible to reliably shield the light that causes ghosting and reduces the visibility of the stereoscopic image.

In the stereoscopic image imaging apparatus according to the first to third inventions, when the light reflecting portion is a metal reflecting surface, the incident angle of light is not limited, a large amount of reflected light can be obtained, and an image is formed over a wide range. A bright stereoscopic image can be obtained.

In the stereoscopic image imaging apparatus according to the first to third inventions, both surfaces of the imaging means are flat flat plates, and the materials other than the light reflecting portion have two or more types having the same or similar refractive index. When made of a transparent resin, the influence of refraction at the interface of the transparent resin is extremely small, phenomena such as total reflection and spectroscopy do not occur, and a clear three-dimensional image with little distortion can be formed.

(A) and (B) are front views and plan views of the image forming means of the stereoscopic image forming apparatus according to the first embodiment of the present invention, respectively, and (C) is AA'of FIG. 1 (A). The arrow view, (D) is the BB'arrow view of FIG. 1 (A). (A) is a cross-sectional view taken along the line CC'of FIG. 1 (B), and FIG. 1 (B) is a cross-sectional view taken along the line EF' of FIG. 1 (B). (A) and (B) are a partially enlarged front view and a partially enlarged side view explaining the formation of a metal reflecting surface in the imaging means of the same stereoscopic image forming apparatus, respectively, and (C) and (D) are the same, respectively. It is a partially enlarged front view and a partially enlarged side view explaining the light reflection prevention processing in the minute plane part of the image forming means of the stereoscopic image imaging apparatus. It is a partially enlarged plan view of the imaging means of the stereoscopic image imaging apparatus. It is a normal cross-sectional view and a side sectional view of the stereoscopic image imaging apparatus. (A) and (B) are a normal cross-sectional view and a side sectional view of the stereoscopic image imaging apparatus according to the second embodiment of the present invention, respectively. It is a partially enlarged plan view of the stereoscopic image imaging apparatus.

Subsequently, the stereoscopic image forming apparatus according to the embodiment of the present invention will be described with reference to the drawings.
First, the imaging means 10 used in the stereoscopic image imaging apparatus according to the first embodiment of the present invention will be described. As shown in FIGS. 1A to 1D, in the imaging means 10, a plurality of radial light reflecting portions (first vertical light reflecting portions) 12 are arranged radially around a reference point X. A plurality of concentric light reflecting units (second vertical) concentrically around the first optical control unit 13 formed in an annular shape in a plan view and the reference point X1 overlapping the reference point X in a plan view. A light reflecting unit) 14 is arranged, and has a second light control unit 15 formed in an annular shape in a plan view. The imaging means 10 has a transparent flat plate having flat surfaces on both surfaces, and the materials other than the radial light reflecting portion 12 and the concentric light reflecting portion 14 are made of two or more kinds of transparent resins having the same or similar refractive index. It has become. Then, at the point where the radial light reflecting unit 12 and the concentric light reflecting unit 14 intersect each other in a plan view, the radial light reflecting unit 12 and the concentric light reflecting unit 14 are orthogonal to each other, so that the light from the object is emitted. The radial light reflecting unit 12 and the concentric light reflecting unit 14 reflect the light to form a three-dimensional image of the object.

The radial light reflecting unit 12 and the concentric light reflecting unit 14 are arranged at a pitch of, for example, 50 to 1000 μm, preferably 100 to 500 μm, and more preferably 200 to 300 μm, respectively. D) shows only a part. It is desirable that the radial light reflecting unit 12 and the concentric light reflecting unit 14 are arranged at equal pitches, but it is also possible to arrange them at different pitches. At this time, the length r of the radial light reflecting portion 12 is preferably in the range of r = (0.2 to 0.8) R with respect to the radius R of the outer shape formed in a circle. Further, since the pitch of the radial light reflecting portion 12 becomes narrower as it approaches the reference point X, it may be partially thinned out if necessary.
Although the imaging means 10 is formed in an annular shape in a plan view, the regions actually used for forming a three-dimensional image are, for example, two rectangular points in FIGS. 1C and 1D. Since it is a portion surrounded by a chain line, in the manufacturing stage, it can be first formed into an annular shape as shown in FIGS. 1 (A) to 1 (D), and then a part of the annular shape can be cut out as an imaging means (hereinafter,). The same applies to the embodiment of). Therefore, if the outer shape at the time of manufacturing is increased, a plurality of imaging means can be cut out, and the productivity can be improved. Further, by increasing the diameter of the outer shape, the radius of curvature of the concentric light reflecting portion is also increased, and the distortion of the stereoscopic image due to the curvature can be reduced. At this time, the outer shape of the image forming means to be cut out can be appropriately selected, and may be rectangular or fan-shaped in addition to a part of the ring.

Hereinafter, the details of the imaging means 10 will be described.
Here, since each concentric light reflecting portion 14 is curved along the concentric circle centered on the reference point X1, in FIG. 2A, the concentric light of the CC'part of FIG. 1B is shown. It is shown as a normal cross-sectional view obtained by enlarging the DD'cross section along the reflecting portion 14 and developing it in a plane (straight line) shape. Further, in FIG. 2B, the cross section of the FF'along the radial light reflecting portion 12 of the EE portion of FIG. 1B is shown as a side sectional view enlarged and rotated by 90 degrees (hereinafter referred to as a side sectional view). same).
As shown in FIG. 2A, in the first optical control unit 13, the reference point X (see FIG. 1C) is centered on the lower surface side (one side of the image forming means 10) of the transparent plate material 16. A plurality of grooves 19 having a triangular cross section having a vertical surface 17 and an inclined surface 18 and a plurality of ridges 20 having a triangular cross section formed between adjacent grooves 19 are arranged radially, respectively. At the bottom of the ridge (between the lower end of the inclined surface 18 and the lower end of the vertical surface 17) and the top of the ridge 20 (between the upper end of the inclined surface 18 and the upper end of the vertical surface 17), 24 is formed.
Further, as shown in FIG. 2B, in the second optical control unit 15, the reference point X1 (see FIG. 1D) is placed on the upper surface side (the other side of the image forming means 10) of the transparent plate material 26. A plurality of grooves 29 having a triangular cross section having a vertical surface 27 and an inclined surface 28 and a plurality of ridges 30 having a triangular cross section formed between adjacent grooves 29 are arranged concentrically with each other at the center. , The bottom of the groove 29 (between the lower end of the inclined surface 28 and the lower end of the vertical surface 27), and the top of the ridge 30 (between the upper end of the inclined surface 28 and the upper end of the vertical surface 27) are microplanes, respectively. The portions 33 and 34 are formed.

Then, metal reflecting surfaces (mirror surfaces) 37 and 38 serving as radial light reflecting portions 12 and concentric light reflecting portions 14 are selectively formed only on the vertical surfaces 17 and 27 of the grooves 19 and 29, and are formed on the inclined surfaces 18 and 28. No metal reflective surface is formed, and the transparent state is maintained. As a method for forming the metal reflecting surfaces (mirror surfaces) 37 and 38, sputtering, metal vapor deposition, spraying of metal fine particles, ion beam irradiation, application of metal paste, etc. are performed directly on the vertical surfaces 17 and 27 of the grooves 19 and 29. However, a resin film having a reflective film formed by sputtering, metal vapor deposition, or the like may be attached to the vertical surfaces 17 and 27 of the grooves 19 and 29. When sputtering, metal vapor deposition, spraying of metal fine particles, irradiation of ion beams, etc. are performed directly on the vertical surfaces 17 and 27 of the grooves 19 and 29, the vertical surface 17 from diagonally above under vacuum or low pressure. Irradiate the metal particles toward 27. At this time, since the micro flat surface portions 23 and 33 are formed at the bottoms of the grooves 19 and 29, respectively, the adhesion of metal particles to the inclined surfaces 18 and 28 is reduced or eliminated to the lower ends of the vertical surfaces 17 and 27. It is possible to irradiate metal particles without spots. In addition, instead of forming the inclined surfaces 18 and 28 of the grooves 19 and 29 in a planar shape, a polygonal surface having a polygonal cross section, a concave surface having an arcuate cross section, or a large number of minute particles recessed inside the ridges 20 and 30. As an uneven surface having various irregularities (scratches), adhesion of metal particles may be prevented.

However, as shown in FIGS. 2A and 2B, in an attempt to form the metal reflecting surfaces (mirror surfaces) 37 and 38 only on the vertical surfaces 17 and 27 of the grooves 19 and 29, FIGS. 3A and 3A, As shown in B), when the metal particles are irradiated (injected) from an oblique direction, the metal film 39 is formed from the vertical surfaces 17 and 27 of the grooves 19 and 29 to the microplanar portions 24 and 34. When the imaging means is manufactured and used with the metal coating 39 formed on the micro flat surfaces 24 and 34 in this way, both sides of the metal coating 39 on the micro flat portions 24 and 34 become light reflecting surfaces and light is emitted. Scattering and specular reflection occur, causing the problem that the stereoscopic image looks whitish. Therefore, it is preferable to perform a process of making the minute flat surface portions 24, 34 a non-light reflecting surface. For example, in the same manner as described above, before and after irradiating the metal particles to form the metal reflecting surfaces (mirror surfaces) 37 and 38, as shown in FIGS. 3C and 3D, the microplanar portions 24 and 34 If the first and second colored films (light absorbing films) 40a and 40b are formed by applying a black paint (ink) to each of the above, in FIGS. 2 (A) and 2 (B). Light incident from either side of the first or second optical control units 13 or 15 can be prevented from being reflected by the microplane units 24 and 34. The color of the first and second colored films is not limited to black, and may be any color that can absorb light, but the ink is a pigment-based ink having a high degree of concealment or a matte-based ink having a high light absorbing capacity. Etc. (for example, an ink containing carbon black) is preferably used. The thickness of the first and second colored films may be, for example, about several μm to several tens of μm, but when the metal film is impregnated with the coloring material, the thickness is 0 μm. Further, instead of forming the first and second colored films, as shown in FIGS. 3A and 3B, the metal extends from the vertical surfaces 17 and 27 of the grooves 19 and 29 to the microplanar portions 24 and 34. After forming the coating film 39, only the metal (unnecessary metal) adhering to the micro flat surface portions 24 and 34 is removed by a peeling treatment, a polishing treatment, or a melting treatment, and the micro flat surface portions 24 and 34 can be used as a transparent light passing surface. good. In this case, in FIGS. 2A and 2B, the light that passes through the image forming means 10 and contributes to the image formation can pass through the microplanar portions 24 and 34 without being reflected, so that the stereoscopic image becomes dark. Can be prevented. In the following FIGS. 5 (A), 5 (B), 6 (A), and (B), unnecessary metals in the minute flat surface portions 24 and 34 are removed, but FIG. 3 (C), The same configuration as in (D) may be adopted. When the width of the minute flat surface portion is extremely small (for example, less than 10 μm), these non-light reflecting surface treatments can be omitted.

Next, the grooves 19 and 29 arranged facing each other are filled with a transparent resin (transparent adhesive) 41. The refractive indexes η1 and η2 of the transparent plates 16 and 26 are the same, and the refractive index η3 of the transparent resin 41 filled between them is 0.8 to 1.2 of the refractive indexes η1 and η2 of the transparent plates 16 and 26. It is preferably in the range of times (more preferably 0.9 to 1.1 times, still more preferably 0.95 to 1.05 times).
Examples of the transparent resin used as a raw material for the transparent plate materials 16 and 26 include heat of cycloolefin polymer, polymethylmetal crate (acrylic resin), amorphous fluororesin, PMMA, optical polycarbonate, fluorene polyester, polyether sulfone and the like. A plastic resin can be used, but one having a particularly high melting point and transparency is preferably used. Further, as the transparent resin 41, a heat-curable type or a two-component mixed type transparent adhesive, which is cured by irradiating with ultraviolet rays or the like, can be used, and in particular, the refractive index η3 is the refractive index. An optical adhesive or the like made of a refractive index adjusting resin whose refractive index is adjusted is preferably used in order to bring it closer to η1 and η2.

As a method of filling the grooves 19 and 29 with the transparent resin 41, the grooves 19 and 29 are opposed to each other so that the reference point X and the reference point X1 (see FIGS. 1C and 1D) overlap each other in a plan view. A sheet-shaped transparent resin having a melting point lower than that of the transparent plates 16 and 26 may be sandwiched between them and heated and pressed in a vacuum state to dissolve and solidify only the transparent resin, respectively. The grooves 19 and 29 are separately filled with a transparent adhesive made of a transparent resin, and then the grooves 19 and 29 are faced to each other and abutted so that the reference point X and the reference point X1 overlap each other in a plan view to obtain the transparent adhesive. It may be cured.
When the inclined surface of each groove has a polygonal surface, a concave surface, an uneven surface, etc., the anchor effect enhances the adhesion between the inclined surface and the transparent resin filled in the groove, and the inside of the groove is filled with the transparent resin without any gap. It can be filled to eliminate unevenness. As a result, light can pass through the interface between the inclined surface and the transparent resin without causing diffused reflection (scattering), refraction can be minimized, and a bright and clear stereoscopic image can be obtained.

The operation of the imaging means 10 will be described with reference to FIGS. 2A and 2B. Light L1 from an object (not shown) enters the second optical control unit 15 from P11 and is a metal reflecting surface. It is reflected by P12 of the concentric light reflecting unit 14 composed of 38. The light reflected by P12 enters the first light control unit 13, is reflected by P13 of the radial light reflection unit 12 composed of the metal reflecting surface 37, and exits into the air from the first light control unit 13 at the position of P14. A going stereoscopic image is formed.
Here, the light L1 enters the transparent resin 41 from the transparent plate material 26 in Q11 of FIG. 2B, passes through Q12 of FIGS. 2A and 2B, and is transparent in S11 of FIG. 2A. Although it exits from the resin 41 and enters the transparent plate 16 The effect of refraction is also extremely small. Although refraction occurs at the positions of P11 and P14, the refraction of P11 and P14 cancels out. Further, both the front and back sides (left and right in FIGS. 2A and 2B) of the radial light reflecting unit 12 and the concentric light reflecting unit 14 function as light reflecting units.
Looking at the movement of the light L1 in a plan view, as shown in FIG. 4, the light L1 reflected once by the concentric light reflecting portion 14 and the radial light reflecting portion 12 is imaged in the air, and the observer 42. Can observe a stereoscopic image.

On the other hand, the light L2 of FIGS. 2A and 2B enters the second light control unit 15 from P21 and is reflected by P22 of the concentric light reflection unit 14 made of the metal reflecting surface 38 to be the first. It enters the optical control unit 13 of the above and goes out to the air from the first optical control unit 13 at the position of P23 as it is.
Here, the light L2 enters the transparent resin 41 from the transparent plate material 26 in Q21 of FIG. 2B, passes through Q22 of FIGS. 2A and 2B, and is transparent in S21 of FIG. 2A. Although it exits from the resin 41 and enters the transparent plate 16 The effect of refraction is also extremely small. Although refraction occurs at the positions of P21 and P23, the refraction of P21 and P23 cancels out.
Looking at the movement of the light L2 in a plan view, as shown in FIG. 4, the light L2 reflected once only by the concentric light reflecting portion 14 is observed by the observer 42 as a ghost without forming an image in the air. Ru.

In order to reduce (eliminate) the ghost generated by the image forming means 10, in the stereoscopic image forming apparatus 43 according to the first embodiment of the present invention, as shown in FIGS. 5A and 5B. The light-shielding means 46 having the first and second polarizing elements 44 and 45 arranged to face one side and the other side of the image forming means 10 is provided. A splitter is an optical filter (linear polarizing element) that extracts light that vibrates only in a certain direction from light that vibrates in all directions (natural light), and can be roughly classified into a reflection type and an absorption type. The reflection type includes a wire grid method and the like, and the absorption type includes an iodine type, a dye type, a polyene type and the like. Reflects or absorbs light that vibrates in a direction parallel to the reflection axis or absorption axis, and transmits only light that vibrates in a direction orthogonal to the reflection axis or absorption axis (transmits in a direction orthogonal to the reflection axis or absorption axis, respectively). There is an axis). The first and second splitters 44 and 45 can be used in either the reflective type or the absorbent type, respectively, but the reflective type will be described below.

The first polarizing element 44 has a first radial reflection axis (hereinafter, also referred to as a radial reflection axis) centered on a reference point X2 that overlaps with a reference point X (see FIG. 1C) in a plan view. The second polarizing element 45 is a concentric second reflection axis that intersects the first reflection axis about the reference point X3 that overlaps the reference point X (see FIG. 1C) in a plan view. (Hereinafter, also referred to as a concentric reflection axis). Therefore, at the point where the radial reflection axis of the first polarizing element 44 and the concentric reflection axis of the second polarizing element 45 intersect in a plan view, the radial reflection axis and the concentric reflection axis are the radial light reflection unit 12. Similar to the relationship between the concentric light reflecting unit 14 and the concentric light reflecting unit 14, they are orthogonal to each other.
Here, as shown in FIG. 4, for example, when the light L2 is reflected once only by the concentric light reflecting portion 14 (P22), the angle θ between the incident light and the reflected light is small, and the vibration direction of the light before reflection is small. (Vibration surface) and the vibration direction of the reflected light hardly change. Therefore, as shown in FIGS. 5A and 5B, the vibration direction of the light L2 that has passed through the second polarizing element 45 and is reflected once only by the concentric light reflecting portion 14 (P22) is the first. Since the light L2 is substantially parallel to the radial reflection axis of the polarizing element 44, the light L2 is reflected by P23 and is shielded without passing through the first polarizing element 44. Further, the vibration direction of the light L1 transmitted through the second polarizing element 45 and reflected once by the concentric light reflecting unit 14 and the radial light reflecting unit 12 is different from the radial reflecting axis of the first polarizing element 44. Since it is not parallel, it passes through the first polarizing element 44 and forms a stereoscopic image in the air. As a result, the stereoscopic image forming apparatus 43 can obtain a bright and clear stereoscopic image with few ghosts. In addition, in FIGS. 5A and 5B, the refraction of light when passing through the first and second splitters 44 and 45 is not taken into consideration.

In the present embodiment, the case where the light transmitted through the second polarizing element 45 and reflected once only by the concentric light reflecting unit 14 is shielded by the first polarizing element 44 has been described, but the first polarization has been described. Since the radial reflection axis of the child 44 and the concentric reflection axis of the second polarizing element 45 are arranged at right angles, the light is transmitted through the second polarizing element 45 and reflected once only by the radial light reflecting unit 12. Light is also shielded by the first polarizing element 44. Further, the stereoscopic image forming apparatus 43 can also be used by turning it upside down (the incoming light side and the outgoing light side are exchanged). In that case, the radial light reflecting unit 12 passes through the first polarizing element 44. Alternatively, the light reflected once only by the concentric light reflecting portion 14 is shielded by the second polarizing element 45. Further, in the present embodiment, as the light shielding means 46, a first polarizing element 44 having a radial reflecting axis is arranged on one side of the imaging means 10, and a second polarizing element having a concentric reflecting axis on the other side. Although 45 is arranged, a first polarizing element having a concentric first reflecting axis is arranged on one side of the imaging means 10, and a second polarizing element having a radial second reflecting axis is arranged on the other side. Even if the Further, as described above, since the polarizing element includes an absorption type in addition to the reflective type, the first polarizing element having a radial reflecting axis and the second polarizing element having a concentric reflecting axis can be used instead of the first polarizing element. A first polarizing element having a radial absorption axis and a second polarizing element having a concentric absorption axis may be used, or a first polarizing element having a concentric absorption axis and a second polarization having a radial absorption axis may be used. You may use a child. Further, the first and second modulators are not limited to the combination of the radial reflection axis and the concentric reflection axis or the combination of the radial absorption axis and the concentric absorption axis, and the combination of the radial reflection axis and the concentric absorption axis. Alternatively, the same effect can be obtained by combining the radial absorption shaft and the concentric reflection shaft. Instead of arranging the reflection axes in a perfect circular shape like the concentric reflection axes, the reflection axes are arranged in a polygonal shape, and the radial reflection axes are arranged in a plan view with respect to the linear reflection axes on each side of the polygonal shape. They may be arranged so as to intersect (orthogonally).

Subsequently, the stereoscopic image forming apparatus according to the second embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
First, the image forming means 51 used in the stereoscopic image forming apparatus 50 according to the second embodiment will be described (see FIGS. 6A and 6B). In the imaging means 10, the grooves 19 and 29 are arranged facing each other, whereas in the imaging means 51, the grooves 19 and 29 are arranged back to back. The groove 19 is filled with a transparent resin (transparent adhesive) 52, and a transparent resin plate 53 having a flat surface is laminated and bonded, and the groove 29 is filled with a transparent resin (transparent adhesive) 54. , The transparent resin plate 55 having a flat surface is laminated and joined. Further, the transparent plate materials 16 and 26 on which the first and second optical control units 13 and 15 are formed are joined and integrated via the transparent adhesive layer 56.
Here, the transparent resin used as the raw material of the transparent plate materials 16 and 26 is the same as that of the first embodiment, and the transparent resins 52 and 54 are preferably the same as those of the transparent resin 41 of the first embodiment. Used for. The refractive indexes η3 and η4 of the transparent resins 52 and 54 are 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, more preferably 0.9 to 1.1 times) the refractive indexes η1 and η2 of the transparent plates 16 and 26. Is preferably in the range of 0.95 to 1.05 times). The transparent resin plates 53 and 55 are preferably made of the same material as the transparent plates 16 and 26, but the refractive index thereof is 0.8 to 1 of the refractive indexes η1 and η2 of the transparent plates 16 and 26. Anything in the range of .2 times (more preferably 0.9 to 1.1 times, still more preferably 0.95 to 1.05 times) can be used. If the surface of the cured transparent resin (transparent adhesive) 52, 54 can be flattened by cutting, polishing, or the like, the transparent resin plates 53, 55 can be omitted. Further, the transparent adhesive forming the transparent adhesive layer 56 also has substantially the same refractive index as the refractive indexes η1 and η2 of the transparent plate materials 16 and 26, similarly to the transparent resins (transparent adhesives) 52 and 54.

Next, the shading means 57 used in the stereoscopic image forming apparatus 50 will be described.
The light-shielding means 57 includes a liquid crystal shutter 58 arranged on one side of the image forming means 51 as shown in FIGS. 6A, 6B, and 7 and an imaging means 51 as shown in FIG. It has a plurality of detecting means 59 arranged along the outer periphery and detecting the position of the observer 42 for observing the stereoscopic image formed by the imaging means 51. As the structure of the liquid crystal shutter 58, a conventionally known one can be used. For example, a typical TN type liquid crystal shutter is a liquid crystal display in which molecules are twisted by 90 degrees and sandwiched between two polarizing filters. When no voltage is applied, light is transmitted and a voltage is applied. Then you can block the light. In the liquid crystal shutter 58, the presence or absence of voltage application is selectively switched for each cell 60 shown by the broken line in FIG. 7, and the light is shielded in the selected region. In order to selectively switch the presence or absence of voltage application for each cell 60, a first electrode (not shown) arranged radially corresponding to the radial light reflecting unit 12 and the concentric light reflecting unit 14 is used. It is preferable to use a second electrode (not shown) arranged concentrically, but the distance between the first and second electrodes is set between the radial light reflecting unit 12 and the concentric light reflecting unit 14, respectively. It does not necessarily have to be equal to the interval. Further, it is sufficient that the voltage can be selectively applied to the position where the first electrode and the second electrode intersect, and the drive method may be a simple matrix drive or an active matrix drive.
As the detection means 59, for example, a motion sensor is preferably used, but the detection means 59 is not limited to this, and any sensor that can detect the position of the observer 42 may be used. As shown in FIG. 7, by arranging a plurality of detecting means 59 along the outer circumference of the imaging means 51, the position of the observer 42 is detected, and the liquid crystal shutter 58 is operated according to the detected position for observation. A predetermined area (hatched portion) in front of the person 42 is shielded. The number and arrangement of the detecting means 59 can be appropriately selected according to the distance between the radial light reflecting portions 12.

Explaining the operation of the stereoscopic image imaging apparatus 50 obtained as described above with reference to FIGS. 6 (A), 6 (B), and FIG. 7, the light L3 from an object (not shown) is the second from P31. It enters the light control unit 15 of the above and is reflected by P32 of the concentric light reflection unit 14 made of the metal reflection surface 38. The light reflected by P32 enters the first light control unit 13, is reflected by P33 of the radial light reflecting unit 12 composed of the metal reflecting surface 37, and reaches the position of P34. At this time, the liquid crystal shutter 58 does not operate in the cell 60 corresponding to the position of P34 deviated from the front of the observer 42 as shown in FIG. 7, and is in a transmissive state as shown in FIG. 6 (A). The light L3 passes through (transmits) the liquid crystal shutter 58 and goes out into the air to form a stereoscopic image.
Here, in Q31 of FIG. 6B, the transparent resin plate 55 is changed to the transparent resin 54, in Q32, the transparent resin 54 is changed to the transparent plate material 26, and in S31 of FIG. 6A, the transparent plate material 16 is changed to the transparent resin 52. In Q33 of 6 (A) and (B), the transparent resin 52 enters the transparent resin plate 53. Since the refractions of 53 and 55 are substantially the same, phenomena such as total reflection and spectroscopy do not occur, and the influence of refraction is extremely small. Further, although the transparent adhesive layer 56 exists between the transparent plate materials 16 and 26, the thickness of the transparent adhesive layer 56 is thin (for example, 5 to 50 μm), and the refractive index of the transparent adhesive layer 56 is the transparent plate material 16. Since the refraction coefficients η1 and η2 of 26 are substantially the same, the influence of refraction when passing through the transparent adhesive layer 56 is extremely small, and a phenomenon such as total reflection does not occur. Although refraction occurs at the positions of P31 and P34, the refraction of P31 and P34 cancels out.

On the other hand, the light L4 of FIGS. 6A, 6B and 7 enters the second light control unit 15 from P41 and is reflected by P42 of the concentric light reflection unit 14 made of the metal reflecting surface 38. Then, it enters the first optical control unit 13 and reaches the position of P43 as it is. As described above, when the light L4 reflected once only by the concentric light reflecting portion 14 appears in the air, it is observed by the observer 42 as a ghost without forming an image. Therefore, as shown in FIG. 7, the liquid crystal shutter 58 operates in a predetermined range (hatched portion) including the cell 60 corresponding to the position of P43 in front of the observer 42, and FIGS. Since the light L4 is in a shielded state as in No. 7, the light L4 is not reflected by the liquid crystal shutter 58 and goes out into the air, and the ghost is reduced (resolved).
Here, the light L4 is from the transparent resin plate 55 to the transparent resin 54 in Q41 of FIG. 6 (B), from the transparent resin 54 to the transparent plate 26 in Q42, and from the transparent plate 16 to the transparent resin 52 in S41 of FIG. 6 (A). In Q43 of FIGS. 6A and 6B, the transparent resin 52 enters the transparent resin plate 53. As described above, the refractors η1 to η4 of the transparent plates 16 and 26 and the transparent resins 52 and 54 Since the refractive coefficients of the transparent resin plates 53 and 55 are substantially the same, phenomena such as total reflection and spectroscopy do not occur, and the influence of refraction is extremely small. Although refraction occurs even at the position of P41, it is finally shielded by the liquid crystal shutter 58, so that it does not affect the image formation in the air.

As described above, in the stereoscopic image forming apparatus 50, the liquid crystal shutter 58 previously sets a predetermined range in front of the observer 42, which is a region where the light reflected once only by the concentric light reflecting portion 14 passes and generates a ghost. By shielding with, the ghost can be reduced (eliminate), and the observer 42 can observe a clear three-dimensional image. In the present embodiment, the cells 60 for two rows in the circumferential direction in front of the observer 42 are shielded by the liquid crystal shutter 58, but the region shielded by the liquid crystal shutter 58 is the stereoscopic image imaging device 50 (imaging). It can be appropriately selected according to the size of the means 51), the arrangement interval of the radial light reflecting unit 12 and the concentric light reflecting unit 14, the distance from the stereoscopic image imaging device 50 to the observer 42, and the like. Further, the stereoscopic image forming apparatus 50 can also be used by turning it upside down (the incoming light side and the outgoing light side are exchanged), and in that case, one of the light incident on the image forming means 51 from the liquid crystal shutter 58 side. The portion can be selectively shielded by the liquid crystal shutter 58. Further, in the present embodiment, the liquid crystal shutter 58 is arranged on one side of the image forming means 51, but the liquid crystal shutter 58 may be arranged on the other side of the image forming means 51.

The present invention is not limited to the above embodiments, but also includes other embodiments and modifications that can be considered within the scope of the matters described in the claims.
For example, the present invention is also applied to a stereoscopic image forming apparatus that combines an imaging means and a shading means according to each embodiment.
Further, in the first and second embodiments, a radial light reflecting unit (first vertical light reflecting unit) and a concentric light reflecting unit (second vertical light reflecting unit) are separately provided on the two transparent plates. The imaging means formed and integrated by arranging the grooves facing each other or back to back has been described, but the radial light reflecting portion (first vertical light reflecting portion) is provided on both sides (front and back) of one transparent plate material. It is also possible to use an imaging means having a concentric light reflecting portion (second vertical light reflecting portion).
The concentric light reflecting portion of the present invention includes not only a perfect circle but also a polygonal shape in which each surface is viewed in a plane and intersects (orthogonally) with the radial light reflecting portion.
Further, in the first embodiment, the combination of the radial reflection axis (or absorption axis) and the concentric reflection axis (or absorption axis) as the reflection axis (or absorption axis) of the first and second polarizing elements. As described above, the reflection axes (or absorption axes) of the first and second polarizing elements may be orthogonal to each other in a plan view, and the reflection axes (or parallel arrangements) formed in a straight line are respectively. The absorption shafts) may be arranged so as to overlap each other in a grid pattern.
Further, in the first embodiment, as the light shielding means, the first and second substituents are arranged to face each other on one side and the other side of the image forming means, but the ghost is mainly a concentric light reflecting portion (first). Since the light is reflected once (normal reflection) only by the vertical light reflecting portion of 2), the first and second polarizing elements are the second light on which the second vertical light reflecting portion is formed. The control units may be arranged facing each other so as to sandwich them from both sides. At this time, the combination and arrangement of the first and second polarizing elements can be appropriately selected as in the first embodiment.

10: Imaging means, 12: Radial light reflecting unit (first vertical light reflecting unit), 13: First light control unit, 14: Concentric light reflecting unit (second vertical light reflecting unit), 15: Second optical control unit, 16: transparent plate material, 17: vertical surface, 18: inclined surface, 19: groove, 20: ridge, 23, 24: micro flat surface part, 26: transparent plate material, 27: vertical surface, 28 : Inclined surface, 29: Groove, 30: Convex, 33, 34: Micro flat surface, 37, 38: Metal reflective surface, 39: Metal film, 40a: First colored film (light absorbing film), 40b: First 2 colored film (light absorbing film), 41: transparent resin, 42: observer, 43: stereoscopic image imaging device, 44: first polarizing element, 45: second polarizing element, 46: light shielding means, 50. : Stereoscopic image imaging device, 51: Imaging means, 52: Transparent resin, 53: Transparent resin plate, 54: Transparent resin, 55: Transparent resin plate, 56: Transparent adhesive layer, 57: Light shielding means, 58: Liquid crystal Shutter, 59: Detection means, 60: Cell

Claims (10)

It is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. The imaging means having a plurality of second vertical light reflecting portions concentrically arranged so as to intersect the first vertical light reflecting portion with X1 as the center, and one side and the other side of the imaging means. The light is provided with a light-shielding means having first and second polarizing elements arranged opposite to each other, and the light transmitted through the first polarizing element and reflected once by the first and second vertical light reflecting portions is emitted. The light that passes through the second polarizing element to form a stereoscopic image in the air, passes through the first polarizing element, and is reflected once only by the first or second vertical light reflecting unit is A stereoscopic image forming apparatus characterized by being shielded by the second polarizing element. It is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. The imaging means having a plurality of second vertical light reflecting portions concentrically arranged so as to intersect the first vertical light reflecting portion with X1 as the center, and one side and the other side of the imaging means. The light is provided with a light-shielding means having first and second polarizing elements arranged opposite to each other, and the light transmitted through the second polarizing element and reflected once by the second and first vertical light reflecting portions is emitted. The light transmitted through the first polarizing element to form a stereoscopic image in the air, transmitted through the second polarizing element, and reflected once only by the first or second vertical light reflecting unit is A stereoscopic image forming apparatus characterized by being shielded by the first polarizing element. In the stereoscopic image imaging apparatus according to claim 1 or 2, the first polarizing element has a plurality of first reflection axes or first absorption axes arranged in parallel, and the second polarizing element is a plurality of parallel axes. , A stereoscopic image formation having a plurality of second reflection axes or second absorption axes arranged in parallel so as to be orthogonal to the first reflection axis or the first absorption axis in a plan view. Image device. In the stereoscopic image forming apparatus according to claim 1 or 2, the first polarizing element is a first reflecting axis or a first reflecting axis radially about a reference point X2 that overlaps with the reference point X in a plan view. The second polarizing element has an absorption axis, and the second polarizing element has a concentric circle shape that intersects the first reflection axis or the first absorption axis with a reference point X3 overlapping the reference point X in a plan view as a center. A stereoscopic image forming apparatus having a second reflection axis or a second absorption axis. In the stereoscopic image forming apparatus according to claim 1 or 2, the first polarizing element is a concentric first reflection axis or a first reflecting axis centered on a reference point X2 that overlaps with the reference point X in a plan view. The second absorbance has a radial shape that intersects the first reflection axis or the first absorption axis about the reference point X3 that overlaps the reference point X in a plan view. A stereoscopic image forming apparatus having a second reflection axis or a second absorption axis. It is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. On one side or the other side of the imaging means having a plurality of second vertical light reflecting portions concentrically arranged intersecting the first vertical light reflecting portion with X1 as the center. The light-shielding means includes a light-shielding means having an arranged liquid crystal shutter, and the light-shielding means selectively shields a part of the light incident from the image-forming means side and passing through the image-forming means with the liquid crystal shutter, or A stereoscopic image imaging device characterized in that a part of light incident on the imaging means from the liquid crystal shutter side is selectively shielded by the liquid crystal shutter. In the stereoscopic image imaging apparatus according to claim 6, the shading means has a detecting means for detecting the position of an observer who observes the stereoscopic image formed by the imaging means, and the detection means detects the position. A stereoscopic image imaging device characterized in that a region to be shielded is determined according to the position of the observer and selectively shielded by the liquid crystal shutter. The stereoscopic image forming apparatus according to any one of claims 1 to 7, wherein the first and second vertical light reflecting portions are metal reflecting surfaces, respectively. In the three-dimensional image imaging apparatus according to claim 8, the imaging means has a flat plate shape on both surfaces, and the materials other than the first and second vertical light reflecting portions have the same or similar refractive index. A stereoscopic image forming apparatus made of two or more kinds of transparent resins. It is a stereoscopic image forming apparatus using an imaging means formed into a shape using an annular shape or a part of the annular shape in a plan view.
It is formed in the shape of a transparent flat plate, has a plurality of first vertical light reflecting portions radially arranged around the reference point X on one side, and is viewed in a plan view on the other side and overlaps with the reference point X. The image forming means is provided with a plurality of second vertical light reflecting portions arranged concentrically around the X1 and intersecting with the first vertical light reflecting portion, and the first vertical light reflecting portion includes the first vertical light reflecting portion. A stereoscopic image forming apparatus characterized in that it is partially thinned out and arranged on the reference point X side.

Images