JP4821963B2 - Hologram observation tool and card using the same - Google Patents

Description

  The present invention relates to a hologram observation tool and a card using the same, and more particularly to a message card that allows a predetermined image or message to be observed near the position of a point light source when the point light source is observed through a hologram of the card.

  In Patent Document 1, hologram glasses are proposed. The hologram glasses are configured as shown in a perspective view in FIG. That is, two transmission holograms 2 and 3 are fitted into the binocular frame of the spectacle frame 1. When a scene including light sources 4, 5, 6, and 7 having a small area as shown in FIG. 3B is viewed by wearing glasses using the transmission holograms 2 and 3, for example, as shown in FIG. 3C. Looks like. That is, the light sources 4, 5, 6, and 7 in the small area in the actual scene of FIG. 3B appear as scenes that are replaced with the previously selected patterns “NOEL” 8, 9, 10, and 11, respectively. As the transmission holograms 2 and 3 having such characteristics, a Fourier transform hologram (Fraunhofer hologram) having the pattern “NOEL” configured as a computer generated hologram is used.

  Such transmission holograms 2 and 3 are created as phase holograms, for example, as follows.

FIG. 2A is a flowchart showing one method for creating such a transmission hologram (Patent Document 2). FIG. 2B is a schematic diagram for explaining the flowchart. In step 101, an original image 21 is created. Next, in step 102, a Fourier transform image 22 of the original image is created using a computer. Next, in step 103, the Fourier transform image 22 is multi-valued into binary values or more to create a Fourier transform image 23. In step 104, a reproduced image is simulated. In this simulation, an inverse Fourier transform is performed on the multi-valued Fourier transform image 23 to obtain a reconstructed image 24, and it is checked whether the processing in each of the above steps has been performed properly. Next, in step 105, the obtained multi-valued Fourier transform image is arranged to a desired range. For example, a computer generated hologram 25 is obtained by arranging four binarized Fourier transform images 23. In practice, for example, ten minimum unit images 23 are arranged vertically and horizontally. Next, at step 106, a master for duplication of the computer generated holograms 25 arranged in this way is prepared using, for example, a semiconductor process (photolithography and etching). Then, in step 107, the concavo-convex relief pattern of the original for duplication is duplicated on, for example, an ultraviolet curable resin to obtain transmission holograms 2 and 3.
US Pat. No. 5,546,198 Japanese Patent Laid-Open No. 10-153943

  As described above, the conventional hologram glasses have a structure in which the transmission holograms 2 and 3 are sandwiched between the frames 1 of the glasses. Therefore, two parts of the transmission holograms 2 and 3 and the glasses frame 1 are necessary. is there. Furthermore, processing for integrating these two parts is necessary.

  Similarly, a hologram observation tool (for example, a single spectacle) composed of a single transmission hologram has a structure in which a transmission hologram is sandwiched between frames, and processing for integrating the two parts is performed. is necessary.

  The present invention has been made in view of the above-described problems of the prior art, and its object is to perform direct printing or the like on a transmission hologram substrate without using a frame that supports and reinforces the transmission hologram. It is to provide a hologram observation tool with improved design and decoration while simplifying the above and a card using the same.

  The hologram observation tool of the present invention that achieves the above object is a hologram observation tool in which a predetermined image or message is reproduced near the position of the point light source when the point light source is observed through the hologram. It is characterized by comprising a layer and a printing layer.

  In this case, the hologram forming layer includes a phase-type diffractive optical element having a concavo-convex structure on the surface, a phase-type diffractive optical element having a refractive index distribution inside the layer, and an amplitude-type diffractive optical element having a layer transmittance distribution. You may comprise from any of these.

  In the case of a phase type diffractive optical element, the hologram forming layer is preferably made of any one of a thermosetting resin, a thermoplastic resin, an ultraviolet curable resin, and an electron beam curable resin.

  Moreover, it is desirable that the printed layer is formed on the opposite side of the hologram forming layer with respect to the transparent substrate.

  Moreover, it is desirable that the hologram forming layer be formed on the side opposite to the observation side with respect to the transparent substrate.

  It is desirable that a protective layer is formed on the hologram forming layer.

  It is desirable that a message entry layer is provided on the print layer.

  In that case, it is desirable that a protective layer for protecting a portion where the message is not written is provided on the message writing layer.

  The present invention includes a card equipped with the above hologram observation tool.

  According to the present invention described above, in the hologram observation tool that can be observed by observing a point light source, a predetermined image or message is reproduced in the vicinity of the position of the point light source. Without compromising the appearance of the observation tool, a frame for inserting a transmission hologram is not required, and a hologram observation tool with improved design and decoration and a card using the same can be provided while simplifying the configuration.

  The hologram observation tool of the present invention is characterized in that a printing layer is provided on a transmission hologram, as will be described in detail below. By providing a print layer on the transparent hologram, it is possible to decorate the transparent hologram and eliminate the need for a frame that sandwiches the transparent hologram that has been required so far, thus reducing the cost of the frame and making the frame transparent. The processing cost for integrating the hologram can be reduced, and a hologram observation tool having a simple structure can be provided at a low cost.

  Embodiments of a hologram observation tool of the present invention and a card using the same will be described below with reference to the drawings. FIG. 1 is a plan view (a) and a sectional view (b) of an embodiment of a card provided with a hologram observation tool according to the present invention.

  As shown in the plan view of FIG. 1A, a card 30 equipped with this hologram observation tool is provided with a transparent hologram area 31, a print area 32 provided around it, and a message entry area 33. The transparent hologram region 31 is a computer generated hologram configured as a transmission type Fourier transform hologram, as in Patent Document 1, and when a point light source is observed through the transmission type hologram, a predetermined image is formed near the position of the point light source. Or the hologram which can observe a message is arrange | positioned, and the predetermined pattern and character information are printed in the printing area | region 32. FIG. Further, the message entry area 33 is an area in which an arbitrary message can be written freely with, for example, a white oil-based pen.

  In order to make such a configuration, as shown in the cross-sectional view of FIG. 1B, a hologram forming layer made of an ultraviolet curable resin or the like on one surface of a transparent substrate 41 constituting the substrate of the card 30. 42 is laminated, and the surface of the transparent hologram region 31 of the hologram forming layer 42 is formed with a concavo-convex surface 43 constituting the diffraction surface of the transmission type Fourier transform hologram as described above. In order to protect the uneven surface 43 on the surface of the hologram forming layer 42, a transparent protective layer 44 is attached on the outer periphery of the transparent hologram region 31 so as to cover the hologram forming layer 42.

  Further, a print layer 45 and a message entry layer 46 are provided on the other surface of the transparent base material 41 except the transparent hologram region 31, and a predetermined pattern or character is provided on the print layer 45 of the print region 32. Information is printed, and the message entry layer 46 in the message entry area 33 is made of, for example, a white layer writable with an oil-based pen or the like. A protective layer 47 is laminated on the print layer 45 and the message entry layer 46 other than the message entry area 33. The message entry layer 46 is composed of, for example, printing ink containing a white pigment, and can be configured so that writing can be performed only in the message entry region 33 by providing the surrounding protective layer 47.

  Since the hologram observation tool of the present invention and the card using the same are configured as described above, printing is directly performed on the transparent base material of the transmission hologram without using a frame that supports and reinforces the transmission hologram, By providing the message entry area, it is possible to obtain a hologram observation tool with improved design and decoration while simplifying the configuration and a card using the same.

  The transmission hologram disposed in the transparent hologram region 31 is preferably a phase hologram in which a hologram diffraction pattern is recorded by the difference in the depth of the concavo-convex pattern on the film surface. Of course, a transmission type hologram as a phase type diffractive optical element having a refractive index modulation type and a refractive index distribution inside the layer, or a transmission type as an amplitude type diffractive optical element in which a hologram pattern is recorded by a transmission part and a non-transmission part It may be a hologram.

  When configured as a phase hologram having a concavo-convex surface 43 on the surface, the concavo-convex pattern on the film surface can be formed by shaping with a thermoplastic resin, a thermosetting resin, or an ultraviolet curable resin.

  Further, the printing layer 45 on the transmission hologram is preferably formed on a surface opposite to the surface on which the uneven surface 43 constituting the hologram diffraction pattern is formed (printing on the uneven surface fills the uneven pattern). The hologram reproduction function is lost, and the uneven surface generally has a high water repellency, which makes it difficult to form a print layer.

  Further, it is desirable that the concavo-convex surface 43 of the transmission hologram is provided on the side opposite to the observation side. The observation side has many opportunities to touch by hand, and the possibility of losing the hologram reproduction function by filling the uneven pattern with dirt is higher than that on the opposite side to the observation side.

  Further, it is desirable to provide the protective layer 44 on the uneven surface 43. This is because the uneven surface 43 is filled with dirt and the hologram reproducing function is lost.

  Further, as shown in FIG. 1, a message entry layer 46 in which a message can be written with an oil-based pen, a ballpoint pen, a pencil, or the like can be provided on the print layer 45.

  Further, it is desirable to provide a protective layer 47 on the message entry layer 46 for protecting a portion where a message is not written.

  As the printing layer 45, another display information different from the display information seen from the observation side (the surface opposite to the surface on which the uneven surface 43 is formed) can be seen through the transparent base material 41 and the hologram forming layer 42. Thus, it is good also as a two-layer printing layer which can display separate information on both sides through a shielding layer.

  The requirements for the transparent base material 41, the hologram forming layer 42, the printing layer 45, the message entry layer 46, and the protective layer 47 are listed below.

  The transparent base material 41 is a base material for the hologram forming layer 42, and can be made of polycarbonate, PET, or the like, and needs to be transparent in the visible light region. The thickness can be arbitrarily set within a range of approximately 0.1 mm to 1 mm. In order to facilitate carrying and observing the hologram observation tool of the present invention, the transparent base material 41 is preferably a solid planar member. It is necessary to be able to form the uneven surface 43 (diffraction surface) on one side and the printing layer 45 on the opposite side.

  The hologram forming layer 42 is a hologram layer that allows a predetermined image or message to be reproduced and observed in the vicinity of the position of the point light source when the point light source is observed. Typically, the uneven surface 43 is formed on the surface. However, it may be a layer having a refractive index distribution of refractive index modulation inside the layer (for example, photopolymer). A layer having a transmittance distribution of the layer may be used. In the case of a layer having an uneven surface, a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, an electron beam curable resin, or the like can be used. The uneven surface 43 is preferably a surface that is recessed from the surrounding flat surface. This is because the protective layer 44 is easily provided.

  The printed layer 45 is a layer for improving the design of the hologram observation tool of the present invention. By providing different printing layers 45 for the common hologram forming layer 42, it is possible to enrich the design variations of the hologram observation tool. By providing a plurality of printing layers 45, different designs can be made on the back surface and the front surface of the hologram observation tool.

  The message entry layer 46 is a layer in which a message or a picture can be freely written on the hologram observation tool of the present invention with an oil-based pen, a ballpoint pen, a pencil or the like. The hologram observation tool of the present invention can be used as a message card. The print layer 45 can also serve as the message entry layer 46. Further, it is not necessary to cover the entire print region 32 with the print layer 45, and a partial print layer 45 may not be provided, and a transparent pattern may be part of the design.

  The protective layer 47 is a layer for protecting the printing layer 45. The durability of the hologram observation tool of the present invention is improved by exposing the message entry portion 33 in the message entry layer 46 and applying the protective layer 47 to the remaining area.

  As described above, the hologram observation tool and the card using the same according to the present invention have been described based on the embodiments. However, the present invention is not limited to these embodiments, and various modifications are possible.

It is the top view (a) and sectional drawing (b) of one Example of the card | curd provided with the hologram observation tool based on this invention. It is the flowchart (a) which shows one preparation method of a transmission hologram, and the schematic diagram (b) for demonstrating the flowchart. It is a figure for demonstrating the conventional hologram glasses and its effect | action.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Glasses frame 2, 3 ... Transmission hologram 4, 5, 6, 7 ... Small area light source 8, 9, 10, 11 ... Preselected replacement pattern 21 ... Original image 22 ... Fourier transform image 23 ... Many Quantized Fourier transform image 24 ... reconstructed image 25 ... computer generated hologram 30 ... card (present invention)
DESCRIPTION OF SYMBOLS 31 ... Transparent hologram area 32 ... Print area 33 ... Message entry area 41 ... Transparent base material 42 ... Hologram formation layer 43 ... Uneven surface 44 ... Protective layer 45 ... Print layer 46 ... Message entry layer 47 ... Protective layer

Claims (9)

A hologram observing tool that can be observed by observing a point light source through a hologram by reproducing a predetermined image or message in the vicinity of the position of the point light source, comprising a transparent substrate, a hologram forming layer, and a printing layer, and forming the hologram The printed layer is provided around the transparent hologram region of the layer and on the opposite side of the hologram forming layer with respect to the transparent substrate, and the hologram forming layer is on the observation side with respect to the transparent substrate. Hologram observation tool characterized in that it is formed on the opposite side . 2. The hologram observation tool according to claim 1, wherein the hologram forming layer comprises a phase type diffractive optical element having a concavo-convex structure on a surface thereof. 2. The hologram observation tool according to claim 1, wherein the hologram forming layer comprises a phase type diffractive optical element having a refractive index distribution inside the layer. 2. The hologram observation tool according to claim 1, wherein the hologram forming layer comprises an amplitude type diffractive optical element having a distribution of transmittance of the layer. The hologram observation tool according to claim 2, wherein the hologram forming layer is made of any one of a thermosetting resin, a thermoplastic resin, an ultraviolet curable resin, and an electron beam curable resin. Hologram viewing device of any one of claims 1 to 5, wherein a protective layer is formed on the hologram forming layer. Hologram viewing device according to any one of 6 claim 1, characterized in that the message entered layer is provided on the printing layer. The hologram observation tool according to claim 7, wherein a protective layer is provided on the message entry layer to protect a portion where no message is entered. Card comprising the hologram viewing device according to any one of claims 1 to 8.

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