JP2011118034A - Image forming body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming body which can be made to be fully small in thickness and which reproduces a stereoscopic image in which image deterioration due to the influence of illumination light is small. <P>SOLUTION: The image forming body has a plurality of anisotropic diffusion reflectors arrayed adjacently on a substrate, wherein the anisotropic diffusion reflectors have a reflection layer laminated at least on a resin layer, the resin layer has a plurality of projection parts formed on its surface, the projection parts have a different length in its orthogonally crossing long side and short side, and the plurality of projection parts are arranged in parallel and with an equal pitch. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique of an image forming body capable of displaying a stereoscopic image while having a substantially planar shape, such as an image forming body using a hologram or a lenticular lens.

  The white light reproduction hologram is a technique capable of reproducing a high-quality stereoscopic image, and a rainbow hologram, a Lippmann hologram, and the like are well known. When an image of a white light reproduction hologram such as an embossed hologram is observed, the image is often reproduced using light such as an electric lamp. However, since ordinary fluorescent lamps are used especially in Japan, the size of the light-emitting part is quite large, so that it can be reproduced with diffuse illumination light instead of point light sources or parallel light. (Non-Patent Documents 1 and 2).

  However, when the embossed hologram is illuminated with diffuse illumination light, the reproduced image is blurred with the size of the illumination light source, and a good image cannot be obtained. This occurs not only in embossed holograms but also in general white light reproduction type holograms in which a stereoscopic image is recorded. For this reason, the white light reproduction hologram has a problem that it is difficult to obtain a good stereoscopic image under normal observation conditions.

  On the other hand, an image forming body for displaying a stereoscopic image that uses a lenticular lens is also used.

  An image forming body using a lenticular lens has a configuration in which a plurality of fine kamaboko lenses are arranged on an image layer displayed by printing or the like. Unlike a hologram, an image forming body using a lenticular lens does not cause blurring of an image due to illumination light, and therefore has an advantage that a considerably good stereoscopic image can be observed even under normal observation conditions (non-patent document). 3).

  However, in the case of an image forming body using such a lenticular lens, the distance between the image layer and the lenticular lens needs to be separated by a distance corresponding to the focal length of the lens. However, several tens to several hundreds of μm are necessary and become considerably thick.

“Principles of Holography”, Optronics, p. Hariharan, Chapter 7 “Holographic Display”, Industrial Books, Junpei Uchiuchi, Chapter 2 "Three-dimensional display", industrial books, Chihiro Masuda, Chapter 5

  As described above, in the case of a hologram conventionally used as an image forming body for reproducing a stereoscopic image, there is a problem that an image is easily blurred due to the influence of an illumination light source, and an image forming body using a lenticular lens is Since the thickness cannot be reduced, there is a problem that it is difficult to use it for purposes such as security.

  The present invention has been made in order to solve such problems, and an image forming body that can reproduce a stereoscopic image that can reduce the thickness of the image forming body sufficiently and has little image quality deterioration due to the influence of illumination light. The purpose is to provide.

As means for solving the above problems, the first invention provides:
A resin layer including a concave-convex structure region in which a plurality of concave portions or convex portions are two-dimensionally arranged on one main surface;
Anisotropic diffused light that diffuses widely in a specific direction and includes a reflective layer that is supported by the one main surface and covers at least a part of the concavo-convex structure region, and narrowly diffuses in a direction perpendicular thereto. An anisotropic diffuse reflector that emits
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
Of the anisotropic diffuse reflectors arranged adjacent to each other, a direction in which diffused light emitted by one adjacent anisotropic diffuse reflector is diffused widely and another anisotropic diffuse reflector adjacent to each other are The image forming body is characterized in that the direction in which the diffused light to be emitted is widely diffused is different.
In addition, the second invention,
A resin layer including, on one main surface, a concavo-convex structure region having a plurality of concave portions or convex portions arranged in first and second directions intersecting each other;
An anisotropic diffuse reflector that emits anisotropic diffused light in a specific direction, which is supported by the one main surface and includes a reflective layer that covers at least a part of the uneven structure region,
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
When observed from a third direction perpendicular to the first and second directions, the direction in which diffused light emitted by one adjacent anisotropic diffuse reflector is diffused widely and the other anisotropy adjacent to each other The image forming body is characterized in that the diffusion direction of the diffused light emitted from the diffuse reflector is different.
The third invention is characterized in that the plurality of concave portions or convex portions arranged in the concavo-convex structure region are arranged in substantially the same direction in each anisotropic diffuse reflector. The image forming body according to any one of 2 above.
It is.
According to a fourth aspect of the present invention, there is provided a resin layer including a concavo-convex structure region having a plurality of concave portions or convex portions arranged in the first and second directions intersecting each other on one main surface;
An anisotropic diffuse reflector that emits anisotropic diffused light in a specific direction, which is supported by the one main surface and includes a reflective layer that covers at least a part of the uneven structure region,
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
The plurality of recesses or projections arranged in the uneven structure region are arranged in the same direction,
The direction of a plurality of recesses or projections provided in one adjacent anisotropic diffuse reflector is different from the direction of a plurality of recesses or projections provided in the other adjacent anisotropic diffuse reflector An image forming body.
The image forming body according to a fifth aspect of the present invention includes a resin layer including, on one main surface, a concavo-convex structure region in which a plurality of concave portions or convex portions are two-dimensionally arranged
It has a structure including a reflective layer that is supported on the one main surface and covers at least a part of the concavo-convex structure region, and emits isotropic diffused light whose diffusion method is almost constant depending on the direction. With an isotropic diffuse reflector
The image forming body according to claim 1, wherein the image forming body is disposed adjacent to at least one anisotropic diffuse reflector.
In addition, the sixth invention,
The image forming body according to any one of claims 1 to 5,
The image forming body is characterized in that, as an image, a projection image corresponding to a three-dimensional object composed of a combination of a plurality of planes is observed from a certain direction.
In addition, the seventh invention,
The image forming body according to claim 1, wherein the uneven region has a relief structure.
Further, the eighth invention is
The anisotropic diffuser is
In the wide diffusion direction, the half-value angle at which the intensity of the diffused light is half that of the regular reflection direction is 30 ° or more,
The image forming body according to any one of claims 1 to 7, wherein a half-value angle is 15 ° or less in a narrow diffusion direction.
In addition, the ninth invention,
The image forming body according to claim 1, wherein
A triangular first anisotropic diffuse reflector;
A triangular second anisotropic diffuse reflector;
A triangular third anisotropic diffuse reflector;
A triangular fourth anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through an upper right diagonal line,
Each of the adjacent anisotropic diffuse reflectors has the same side length.
The tenth aspect of the invention is
The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A trapezoidal second anisotropic diffuse reflector;
A trapezoidal third anisotropic diffuse reflector;
A trapezoidal fourth anisotropic diffuse reflector;
A rectangular, isotropic diffuse reflector that emits isotropic diffused light,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper left diagonal line,
One side of the isotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through an upper horizontal line,
One side of the isotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a left vertical line,
One side of the isotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other via a lower horizontal line,
One side of the isotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through a right vertical line,
Each of the adjacent anisotropic diffuse reflectors has the same side length.
The eleventh invention
The image forming body according to claim 1, wherein
A parallelogram first anisotropic diffuse reflector;
A parallelogram-shaped second anisotropic diffuse reflector;
A parallelogram-shaped third anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a vertical line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through diagonal lines,
One side of the third anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to a horizontal line,
Each of the adjacent anisotropic diffuse reflectors has the same side length.
In addition, the twelfth invention
The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A triangular second anisotropic diffuse reflector;
A trapezoidal third anisotropic diffuse reflector;
A triangular fourth anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper left diagonal line,
One side of the first anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a horizontal line,
Each of the adjacent anisotropic diffuse reflectors has the same side length.
The thirteenth invention
The image forming body according to claim 1, wherein
Around the polygon, the trapezoid is arranged so that each side of the polygon touches the upper or lower base of the trapezoid, and each trapezoid touches the adjacent trapezoid at the hypotenuse, and the hatched part of both trapezoids An anisotropic diffuse reflector that spreads widely in the same direction is placed on the trapezoid that has the same length of the line, and the direction of the line that goes down perpendicular to the base of each trapezoid is the same.
For trapezoids in which the direction of the line that goes down perpendicular to the base of each trapezoid is different,
An image forming body characterized in that anisotropic diffuse reflectors that spread widely in different directions are arranged.
In addition, the fourteenth invention
The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A trapezoidal second anisotropic diffuse reflector;
A trapezoidal third anisotropic diffuse reflector;
A trapezoidal fourth anisotropic diffuse reflector;
A trapezoidal fifth anisotropic diffuse reflector;
A trapezoidal sixth anisotropic diffuse reflector;
Hexagonal, has an isotropic diffuse reflector that emits isotropic diffused light,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through an underline,
One side of the fourth anisotropic diffuse reflector and one side of the fifth anisotropic diffuse reflector are arranged adjacent to each other through a lower right oblique line,
One side of the fifth anisotropic diffuse reflector and one side of the sixth anisotropic diffuse reflector are arranged adjacent to each other through an upper right diagonal line,
One side of the sixth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper line,
The isotropic diffuse reflector is
One side of the isotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through a middle lower left oblique line,
One side of the isotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a middle left vertical line,
One side of the isotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a middle upper left oblique line,
One side of the isotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through a middle upper right vertical line,
One side of the isotropic diffuse reflector and one side of the fifth anisotropic diffuse reflector are arranged adjacent to each other through a middle right vertical line,
One side of the isotropic diffuse reflector and one side of the sixth anisotropic diffuse reflector are arranged adjacent to each other via a middle right lower vertical line,
Each of the adjacent anisotropic diffuse reflectors has the same side length.

According to the first invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body sufficiently, and due to the influence of illumination light. It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality deterioration. The anisotropic reflector in the present invention reflects white diffused light that spreads around the specular reflection direction when white light is incident, and the spread of the diffused light is perpendicular to the specular reflection direction. The specific direction is different from the direction orthogonal to the specific direction.
In addition, according to the second aspect of the invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body sufficiently, It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
Further, according to the third invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to sufficiently reduce the thickness of the image forming body, It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
In addition, according to the fourth aspect of the invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body sufficiently. It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
In addition, according to the fifth aspect of the invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
In addition, according to the sixth aspect of the invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
Further, according to the seventh invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
Further, according to the eighth invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body sufficiently, It is possible to provide an image forming body that reproduces a stereoscopic image with little image quality degradation due to influence.
Further, according to the ninth invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a three-dimensional image in which a square pyramid is observed from above with little image quality degradation due to influence.
In addition, according to the tenth invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body sufficiently, It is possible to provide an image forming body that reproduces a three-dimensional image obtained by observing a three-dimensional object such as a pyramid-shaped quadrangular pyramid cut by a plane parallel to the bottom surface with little image quality deterioration due to the influence.
In addition, according to the eleventh invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a three-dimensional image obtained by observing a cube or a rectangular parallelepiped obliquely with little image quality degradation due to influence.
In addition, according to the twelfth invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a three-dimensional image in which a roof-like shape is observed from above, or a combination thereof, with little image quality degradation due to influence.
Further, according to the thirteenth invention, not only can the anisotropic diffused light be uniformly emitted in a specific direction for each concavo-convex structure region, but the thickness of the image forming body can be made sufficiently thin, It is possible to provide an image forming body that reproduces a stereoscopic image in which an arbitrary image formed as a polygon protrudes or is retracted with little image quality degradation due to influence. For example, it is possible to provide an image forming body that reproduces a three-dimensional image obtained by observing a three-dimensional object such as a pyramid-shaped pyramid having a convex bottom surface cut by a plane parallel to the bottom surface. In this case, the anisotropic diffuse reflector so that the direction of the anisotropic scattered light is the same for the trapezoid corresponding to the side surface of the three-dimensional shape and the surface where the direction of the line descending to the lower side of the parallelogram is the same If it is arranged, the image forming body can be visually recognized more three-dimensionally.
According to the fourteenth aspect of the invention, it is possible not only to uniformly emit anisotropic diffused light in a specific direction for each concavo-convex structure region, but also to reduce the thickness of the image forming body to a sufficient level. It is possible to provide an image forming body that reproduces a three-dimensional image obtained by cutting a hexagonal pyramid with a plane parallel to the bottom surface with little image quality degradation due to the influence.

Schematic diagram showing an example of an anisotropic diffuse reflector used in the image forming body of the present invention Schematic diagram showing an example of an anisotropic diffuse reflector used in the image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of a visual recognition state of the image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of an image forming body of the present invention Schematic diagram showing an example of diffused light when observing a diffuse reflector Schematic diagram showing one embodiment of a process for producing an image forming body of the present invention Schematic diagram showing an example of a mask used in the process of creating the image forming body of the present invention Schematic diagram showing an example of an anisotropic diffuse reflector used in the image forming body of the present invention

  Next, the principle by which the stereoscopic image can be observed according to the present invention will be described.

  As a principle of displaying a stereoscopic image, binocular parallax is known in which the corresponding positions of objects appear differently between the right eye and the left eye, and binocular parallax is used in many stereoscopic displays.

  However, when a person sees an object with his / her eyes and decides that it is a three-dimensional object, it does not judge only with binocular parallax information, but various things such as the shape, shadow, and gloss of the object that enters the eye From this information, it is judged that it is a three-dimensional image, and the magnitude of the influence of each element on the three-dimensional effect varies depending on the object to be observed and the observation conditions.

For example, when the depth of the object to be observed is large, the difference in the position of the corresponding object observed between the right eye and the left eye is large, so that the effect of binocular parallax becomes large. Conversely, in the case of an image with a small difference in position when viewed with both eyes, such as an object with a small depth or an object at a distance, the influence of binocular parallax is small.

In particular, in the case of an object having a relatively small depth and strong gloss, the stereoscopic effect is almost determined by the brightness distribution of the image centered on the gloss.

  For this reason, when such an image is expressed, even when there is no binocular parallax, a projection image corresponding to the observation of a three-dimensional object from a certain direction is recorded as the image, and its brightness If the distribution is expressed like a three-dimensional object, a sufficient three-dimensional effect can be obtained. Therefore, in the present invention, based on such a concept, a method is used in which an image itself is formed on a display surface and a stereoscopic image is obtained by well expressing gloss and brightness.

  In the present invention, as such an object having a relatively small depth and strong gloss, a solid object made of a highly glossy material such as metal and having a surface with a certain degree of roughness, for example, a cube A polyhedron such as a square pyramid is assumed.

  In the case of such an object, the way in which the light reflected on each surface is seen has the following characteristics.

  First, since the gloss is strong, strong light is reflected in the regular reflection direction with respect to the illumination light. Therefore, the surface where the observer's direction is close to the regular reflection direction of the illumination light becomes very bright, and a normal white image Is much brighter (more than a few times).

  On the contrary, the surface in the direction greatly deviating from the regular reflection becomes considerably dark, and a large contrast can be obtained as compared with the brightness in the regular reflection direction.

  The surface in the angular direction between them has an intermediate brightness between the two, and the surface in the direction closer to the surface in the regular reflection direction becomes brighter.

  Since these conditions differ depending on the incident direction of illumination light and the observation direction of the observer, the brightness of each surface changes when the direction of the illumination light and the observation angle of the observer change.

  Furthermore, surfaces that face the same direction can obtain substantially the same brightness, and surfaces that have different angles with respect to the illumination light have different brightness.

When the conditions are arranged (1) there is a surface that appears brighter than white (2) sufficient contrast is obtained (3) there is a brightness gradation (4) the brightness changes depending on the direction of the illumination light and the observer (5 ) Surfaces in the same direction have almost the same brightness. (6) Surfaces in different directions have different brightness.

  For this reason, it is necessary to satisfy these conditions in order to properly express the gloss and shadow of such a three-dimensional object.

  In order to enable such expression, in the present invention, diffuse reflected light by an anisotropic diffuse reflector is used. FIG. 11 is a schematic diagram illustrating an example of diffused light when a diffuse reflector is observed.

  Usually, when observing a planar reflection type image forming body, for example, as shown in FIG. 11A, illumination light is applied from a direction close to an oblique upper side, and an image is observed from a direction close to the front. There are many cases.

  When the illumination light 9 is applied to the diffuse reflector 8, the range 2 of the reflected light becomes light that spreads around the direction of the regular reflection 2a, and is wide in the direction of large diffusion and narrow in the small direction.

For this reason, when the anisotropic diffuse reflector is observed under such an observation condition, if the specular reflection direction and the plane including the observer are in the direction in which the diffuse reflector spreads widely, the reflection of FIG. A strong diffused light 2 that is diffused widely as in the light range 2 reaches the observer, so that it is observed as a bright image.

At this time, if the diffusion angle is appropriately selected, the range in which the light spreads can be appropriately reduced, so that it is possible to express an image brighter than white, which is the condition (1).

Usually, the illumination light is often observed at about 30 to 45 °, but the diffused light spreads almost like Gaussian, the light intensity is strong in the regular reflection direction of the illumination light, and then the light intensity changes as the direction changes. In the case of characteristics such that the difference in the diffusion range depending on the direction is small, if the half-value angle of the diffused light is about 30 ° or more, an image brighter than normal white is obtained. be able to.
Actually, the direction of narrow diffusion is much narrower than that of isotropic diffusion, and the light is concentrated. Therefore, if the half-value angle in the wide direction is 30 ° or more, an image much brighter than white can be obtained. Can do.

On the other hand, if the range 3 of the reflected light is only narrow as shown in FIG. 11B, the diffused light 3b to the front reaches only the weak diffused light with respect to the regular reflection 3a. 1 is observed as a dark image.

At this time, in order to obtain high contrast, which is the condition (2), it is necessary to suppress the narrower spread angle to a certain extent. Considering that the illumination light is observed from about 30 ° direction, if it is considered to be 1/10 or less of the peak so that it looks sufficiently dark at this angle, the spread of diffused light is a distribution close to Gaussian. The narrower half-value angle should be set to 15 ° or less.

And if it is the direction between them, it will become the intermediate brightness, and a brighter image is observed, so that it is near the direction which spreads widely.

Therefore, the condition (3) that there is a brightness gradation can be satisfied. However, in the case of the diffuser to be used, the narrower spread is extremely narrow, and in the case of diffusion close to one direction, the brightness is drastically reduced only by a slight change in angle, making it difficult to express gradation. For this reason, it is better to set the half-value angle to about 3 ° or more so as not to be too narrow.

Next, the condition (4) is that the brightness changes depending on the direction of the illumination light and the observer. If the direction of the illumination light or the direction of the observer changes, the specular reflection direction and the observation are observed. The direction of the surface formed by the person changes, and the angle to the anisotropic diffuse reflector also changes.

  For this reason, when the direction of the illumination light or the direction of the observer changes, the brightness of the image by the anisotropic diffuser also changes. Therefore, the condition (4) can also be satisfied.

  Next, the conditions of (5) and (6) are the same, but when the anisotropic diffuser has the same wide spreading direction, it is at the same angle with respect to the specular reflection direction and the surface formed by the observer. It will be.

  On the other hand, those with different spreading directions are at different angles with respect to the specular reflection direction and the surface formed by the observer, and therefore have different brightness.

  For this reason, as in the present invention, among three-dimensional objects created by a combination of planes, anisotropic diffuse reflectors that diffuse widely in the same direction are placed in different directions at positions corresponding to surfaces in the same direction. If an anisotropic diffuse reflector that diffuses widely in different directions is installed at the position corresponding to the surface, the surfaces in the same direction have almost the same brightness, and the surfaces in different directions have different brightness. Will be observed. For this reason, the conditions of (5) and (6) can also be satisfied.

  At this time, with respect to the surfaces forming the three-dimensional object, since the surface brightness (surfaces) that are close to each other are relatively close to each other, the anisotropy is such that the direction in which the diffused light spreads widely is close to the angle. It is better to place a diffuse reflector, and the brightness of the surface is greatly different if the direction of the surface is significantly different, so it is better to install an anisotropic diffuse reflector that has a greatly different direction in which the diffused light spreads widely good.

  As described above, by using the image forming body as in the present invention, the brightness distribution possessed by the polyhedron having a relatively small depth and strong gloss can be expressed well. For this reason, an image with sufficient stereoscopic effect can be obtained.

  Further, in terms of image blur, in the image forming body of the present invention, the image itself is displayed on the display surface and is not formed at a deep position like a hologram. For this reason, image blurring does not occur even when illuminated with diffused light or the like.

  Furthermore, when considering the thickness of the image forming body, the anisotropic diffuse reflector having the characteristics as used in the present invention can be realized even with a rugged structure of about 1 μm or less. The image forming body can be made sufficiently thin.

  Hereinafter, the image forming body of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view showing the structure of an anisotropic diffuse reflector used in an image forming body of the present invention. FIG. 1A is a plan view of the anisotropic diffuse reflector 12, and in this figure, the shape of the anisotropic diffuse reflector 12 is a triangle. Moreover, FIG.1 (b) is the figure which showed typically the cross section in the XX line of Fig.1 (a). FIG. 1C is an example of a photographic image obtained by enlarging the surface of the anisotropic diffuse reflector shown in FIG. In addition, in the anisotropic reflector 12 of FIG. 1, the mode observed from the reflective layer side is shown.

  As shown in the figure, the anisotropic diffuse reflector 12 has a structure in which an uneven structure region 15 is formed on the resin layer 13 and the surface of the resin layer, and the reflective layer 14 is laminated on the uneven structure region 15. It has become. The uneven structure region 15 is provided with a plurality of concave portions or convex portions. The plurality of concave portions or convex portions emit scattered light in a specific direction when irradiated with light. Further, although not shown this time, a flat surface which is a non-relief structure region may be provided.

  Further, the reflective layer 14 is formed on the main surface of the resin layer 13 including the concavo-convex structure region 15 so as to cover at least a part of the concavo-convex structure region 15. Although not shown here, a light transmission layer may be provided to protect the reflective layer 14 so as to cover the reflective layer 14.

  Next, a structure that can be used for the uneven structure region 15 will be described. The uneven structure region 15 is provided with a plurality of recesses or protrusions. Note that, as described above, the non-concave structure region is a flat surface. Further, the non-relief structure region can be omitted.

FIG.1 (c) is an example of the photographic image which expanded the surface of the anisotropic diffuse reflector 12 of Fig.1 (a) from the front. The diffuse reflector in this photograph has a surface relief structure that is uneven in the depth direction of the paper surface, and a reflective layer is formed thereon. In addition, the surface relief structure in the present invention refers to a structure in which the surface is uneven.
In this figure, a random structure can be observed, but the entire horizontal direction has a fine pitch and the vertical direction has a coarse pitch.

  FIG. 14 is a schematic diagram showing an example of an anisotropic diffuse reflector used in the image forming body of the present invention. FIG. 14A is a schematic diagram showing a cross section when, for example, an anisotropic diffuser having a surface relief structure as shown in FIG. 1C is cut in the lateral direction, and FIG. It is a schematic diagram which shows a cross section when cut similarly to an up-down direction. Since the horizontal direction has a fine pitch, the inclination due to the unevenness becomes steep, and the angle change of the reflected light increases as shown in FIG. 14C, so that the diffused light spreads over a wide range. On the other hand, since the vertical direction has a rough pitch, the inclination due to the unevenness becomes gentle and the angle change of the reflected light becomes small as shown in FIG. 14D, so that the diffused light spreads only in a narrow range.

  The anisotropic diffuse reflector shown in the photograph of FIG. 1 (c) has a lateral pitch of about 5 μm, a vertical pitch of about 50 μm, and an unevenness of about 1 μm. In contrast, the diffuse reflected light spreads in the range of about 35 ° at the half-value angle and about 7 ° at the half-value angle in the lateral direction. Note that these pitch and depth values are merely examples and do not limit the present invention.

  Moreover, FIG.1 (d) is an enlarged view of another aspect which expanded the surface of the anisotropic diffuse reflection body 12 of Fig.1 (a). In the example shown in FIG. 1D, the concave portions or the convex portions RP arranged in the concavo-convex structure region 15 are two-dimensionally arranged. Even in such a case, scattered light can be emitted only in a specific direction and angle when irradiated with illumination light.

  The array of the plurality of concave portions or convex portions RP is, for example, an array close to a square lattice, a rectangular lattice, or a triangular lattice. By controlling the arrangement of the concave portions or the convex portions RP, it is possible to adjust the emission angle, the emission direction, and the like of the scattered light emitted from the concavo-convex structure region 15 with higher accuracy. FIG. 1D illustrates a case where a plurality of convex portions are two-dimensionally arranged in the X direction and the Y direction to form a rectangular lattice as an example. Note that, if they are arranged completely regularly, diffracted light corresponding to this cycle is generated, and in reality, it is necessary to arrange them at a slight distance from these positions at random.

  In addition, each of the concave portion or the convex portion RP can have various shapes. Each of the concave portions or the convex portions RP preferably has a forward tapered shape such as a pyramid, a cone, and a semi-spindle shape, and particularly preferably has a semi-spindle shape. By adopting the semi-spindle shape, the specific direction and angle at which the scattered light is emitted can be further limited. Moreover, when the concavo-convex structure region 15 is observed from the normal direction, the reflectance of the regular reflection light of the concavo-convex structure region 15 can be further reduced by having the forward tapered shape.

  Although not shown this time, even when the concave or convex portion RP has a pyramid, conical and semi-spindle shape, the long side length, short side length, height and pitch of the concave or convex portion RP may vary. It is sufficient that the scattered light can be emitted only in a specific direction and angle when the illumination light is irradiated. By controlling the lattice constants, orientations, depths, and the like of the plurality of grooves, it is possible to arbitrarily adjust the exit angles and exit directions of diffracted light and scattered light emitted from the concavo-convex structure region 15.

  The length of the long side of the concave or convex portion RP arranged in the concave / convex structure region 15 is preferably 3 μm or more and 10 μm or less, and the pitch between adjacent convex portions or between the concave portions in the concave / convex structure region is preferably about 1 to 2 μm. . In the long side and the short side of the concave portion or the convex portion RP, it is preferable that the pitch in the long side direction is longer than the pitch in the long side direction compared with the pitch in the short side direction.

  As a material used for the resin layer 13, a resin material having good moldability, hardly causing unevenness, obtaining a bright reproduced image, and having good adhesion to the base material, the protective layer, and the adhesive layer is preferable. For example, polyurethane resins, polycarbonate resins, polystyrene resins, polyvinyl chloride resins, propylene resins, polyethylene terephthalate resins, polyacetal resins, and other thermoplastic resins, unsaturated polyester resins, melamine resins, epoxy resins, urethane (meth) acrylates, polyols Thermosetting resin such as (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, acrylonitrile styrene copolymer resin, phenol resin, melamine resin, urea resin, alkyd resin, polycarbonate resin, acrylic resin, Fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene resin, fluorene resin, PET, Photocurable resins such as propylene, mixtures thereof, thermoformable materials having radically polymerizable unsaturated groups, etc. can be used. If available, it can be used. And an additive may be added to the said material, thermoplasticity and thermosetting may be added, and photocurability may be provided. Further, a visible light transmissive resin that transmits visible light may be used, or a colored material may be used. Alternatively, inorganic materials containing silicates may be used

  The reflective layer 13 covers the whole or a part of the main surface provided with the concave structure and / or the convex structure of the resin layer 13.

  The material used for the reflective layer 13 may be a material in which a metal such as Al, Sn, Ni, Co, Cr, Fe, Ag, Au, or Pt is formed as a discontinuous thin film.

  As a method for forming the reflective layer, film forming means such as a sputtering method and an ion plating method can be applied in addition to the vacuum evaporation method, and the film thickness is preferably in the range of 10 nm to 5000 nm. When the film thickness is 50 nm or more and 100 nm or less, the film has transparency, so that it is possible to see both the image of the image display body and the information on the substrate when information is displayed on the substrate. On the other hand, if it is thicker than 1000 nm, light is not transmitted and sufficient reflectivity can be obtained. On the other hand, if it is thinner than 10 nm, a diffraction grating that can be visually confirmed cannot be expressed.

  In addition, the design property different from the case where it coat | covers the whole can also be provided by coat | covering the reflection layer 13 only to a part of uneven structure.

  In the anisotropic diffuse reflector of the present invention, the light diffusion state changes depending on the direction of the illumination light or the angle viewed by the observer. A plurality of the above-mentioned anisotropic diffuse reflectors are arranged, and the direction of diffused light emitted from one adjacent anisotropic diffuse reflector differs from the direction of diffused light emitted from the other anisotropic diffuse reflector By doing so, a stereoscopic image can be displayed.

  FIG. 2 is a view showing a change in visual visibility that occurs when the direction of the convex portion on the surface of the anisotropic diffuse reflector used in the image forming body in the present invention is changed.

  FIG. 2A is a plan view showing an example of an image forming body, in which four types of anisotropic diffuse reflectors 22, 23, 24, and 25 are arranged. Anisotropic diffuse reflector 22 in which diffused light is widely spread in an anisotropic diffuse reflector 22 arranged at 0 °, an anisotropic diffuse reflector 23 arranged at 45 °, and an anisotropic diffuse reflector arranged at 90 °. An anisotropic diffuse reflector 25 arranged in a body 24, 135 ° was prepared.

  FIG. 2B is an enlarged view of the anisotropic diffuse reflector shown in FIG. 2A, and shows enlarged views of each of the four types of anisotropic diffuse reflectors 22, 23, 24, and 25. . The convex portions 25, 35, 45, and 55 that are elliptical patterns are arranged at 0 °, 45 °, 90 °, and 135 °, respectively. And in each anisotropic diffuse reflector, the convex part is arranged in parallel with respect to the long side direction.

  FIG. 2C schematically shows a visual recognition state when the observer visually observes the image forming body when the image forming body of the figure is irradiated with illumination light from a certain direction. In addition, the arrow in a figure shows the advancing direction of the light irradiated from the illumination light 16 typically.

  When the projections are arranged perpendicular to the traveling direction of the illumination light as in the anisotropic diffuse reflector 22, the illumination light diffused by the projections reaches the observer sufficiently, so the anisotropic diffuse reflection Body 1 is observed white. On the other hand, when the convex portions are arranged in parallel to the traveling direction of the illumination light as in the anisotropic diffuse reflector 24, since the illumination light diffused by the convex portions does not reach the observer, the anisotropic diffuse reflection Body 3 is observed black. Further, when the convex portions are arranged obliquely with respect to the traveling direction of the illumination light as in the anisotropic diffuse reflector 23 and the anisotropic diffuse reflector 25, the illumination light diffused by the convex portions is anisotropically diffused. Since the diffused light intermediate between the reflector 1 and the anisotropic diffuse reflector 3 can be observed, it looks gray.

  The illumination light of the present invention is not particularly limited, and sunlight, general visible light, general illumination such as a fluorescent lamp and an incandescent lamp, and linear illumination may be used.

  The visual state of the anisotropic diffuse reflector can be changed by rotating the anisotropic diffuse reflector and changing the direction of the projection if the position of the observer and the position of the illumination light are fixed. be able to.

  FIG. 3 is a schematic view showing an example of an image forming body that reproduces a stereoscopic image. FIG. 3A is a plan view thereof, and FIG. 3B is a cross-sectional view taken along line YY. A stereoscopic image can be displayed by arranging a plurality of anisotropic diffuse reflectors. The image forming body of this figure includes a triangular anisotropic diffuse reflector 32, a triangular anisotropic diffuse reflector 33, a triangular anisotropic diffuse reflector 34, and an anisotropic triangle on a substrate. A diffuse diffuser 35, one side of the anisotropic diffuse reflector 32 and one side of the anisotropic diffuse reflector 33 are arranged adjacent to each other via the upper left oblique line 131, and the anisotropic diffuse reflector 33. And one side of the anisotropic diffuse reflector 34 are arranged adjacent to each other via a lower left oblique line 132, and one side of the anisotropic diffuse reflector 34 and one side of the anisotropic diffuse reflector 35 are lower right oblique lines. 133, and one side of the anisotropic diffuse reflector 35 and one side of the anisotropic diffuse reflector 31 are arranged adjacent to each other via the upper right oblique line 134. The side lengths of the diffusive diffuse reflector are the same.

  The anisotropic diffuse reflectors 22, 23, 24, and 25 described above correspond to the anisotropic diffuse reflectors 32, 33, 34, and 35 in the figure, and the shape of the convex portions on the surface and the arrangement of the convex portions. Is also supported. FIG. 4A shows a square image display body 30 that is arranged on a base material of anisotropic diffuse reflectors 32, 33, 34, and 35 and triangles are combined. In FIG. 4B, the anisotropic diffuse reflector 32 and the anisotropic diffuse reflector 34 are laminated on the base material 31. The anisotropic diffuse reflectors 32 and 34 have a structure in which the reflective layer 14 is laminated on the resin layer 13, but the anisotropic diffusive reflectors 32 and 34 have different structures on the surface of the resin layer. The cross-sectional shape differs depending on the area.

  The material used as the base material 31 is a known glass material or plastic such as a plastic sheet such as polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene (PE), etc. Sheet. Moreover, you may use well-known metal materials, such as aluminum and stainless steel. The thickness of each material is not particularly limited. A film-like one may be used and may be appropriately selected depending on the application and purpose. In addition, an adhesive layer may be provided on the base material in order to improve the adhesiveness with the resin layer and to anisotropic diffuse reflector. The material used for the adhesive layer is not particularly limited, and a known material may be appropriately selected depending on the purpose and application.

FIG. 4 is a schematic diagram schematically showing how an observer can visually recognize the illumination light from each direction on the image forming body 30 of FIG.

  For example, in FIGS. 4A and 4H, the image forming body 30 is irradiated with irradiation light from directions of 135 ° and 315 °, respectively. As a result, the anisotropic diffuse reflector 33 in which the convex portions are arranged perpendicular to the traveling direction of the illumination light appears white. Further, the anisotropic diffuse reflector 35 in which the convex portions are arranged in parallel with the traveling direction of the illumination light looks black. The anisotropic diffuse reflectors 32 and 34 in which the convex portions are arranged obliquely with respect to the traveling direction of the illumination light appear gray.

  4B and 4G show the image forming body 30 irradiated with irradiation light from directions of 90 ° and 180 °, respectively. As a result, the anisotropic diffuse reflector 32 in which the convex portions are arranged perpendicular to the traveling direction of the illumination light appears white. Further, the anisotropic diffuse reflector 34 in which the convex portions are arranged in parallel to the traveling direction of the illumination light looks black. The anisotropic diffuse reflectors 33 and 35 in which the convex portions are arranged obliquely with respect to the traveling direction of the illumination light appear gray.

  4C and 4F show the image forming body 30 irradiated with irradiation light from directions of 45 ° and 225 °, respectively. As a result, the anisotropic diffuse reflector 35 in which the convex portions are arranged perpendicular to the traveling direction of the illumination light appears white. Further, the anisotropic diffuse reflector 33 in which the convex portions are arranged in parallel with the traveling direction of the illumination light looks black. The anisotropic diffuse reflectors 32 and 34 in which the convex portions are arranged obliquely with respect to the traveling direction of the illumination light appear gray.

  4D and 4E show the image forming body 30 irradiated with irradiation light from directions of 180 ° and 0 °, respectively. As a result, the anisotropic diffuse reflector 34 in which the convex portions are arranged perpendicular to the traveling direction of the illumination light appears white. Further, the anisotropic diffuse reflector 32 in which the convex portions are arranged in parallel with the traveling direction of the illumination light looks black. The anisotropic diffuse reflectors 33 and 35 in which the convex portions are arranged obliquely with respect to the traveling direction of the illumination light appear gray.

  As described above, when the traveling direction of the illumination light is changed, the amount of diffused light of each anisotropic diffuse reflector that forms the image forming body is changed, so that the brightness appears to be changed visually. Then, it is possible to observe an image in which a square image forming body has a square at the bottom and a pyramid-shaped square pyramid viewed from above. In such a state, the same phenomenon occurs even if the direction of the observer or the direction of the image forming body is changed without changing the direction of illumination.

  In addition, although this time demonstrated using only one square like FIG. 4, various stereoscopic images are reproducible by combining several anisotropic diffuse reflectors. In addition, a plurality of image forming bodies 30 shown in the figure may be arranged to form a new image forming body.

  FIG. 5 is a schematic diagram illustrating an example of an image forming body that displays a stereoscopic image. Trapezoidal anisotropic diffuse reflector 52, trapezoidal anisotropic diffuse reflector 53, trapezoidal anisotropic diffuse reflector 54, trapezoidal anisotropic diffuse reflector 55, square isotropic Isotropic diffuse reflector 56 that emits the diffused light, and one side of anisotropic diffuse reflector 52 and one side of anisotropic diffuse reflector 53 are arranged adjacently via upper left oblique line 151, One side of the anisotropic diffuse reflector 53 and one side of the anisotropic diffuse reflector 54 are arranged adjacently via a lower left oblique line 152, and one side of the anisotropic diffuse reflector 54 and the anisotropic diffuse reflector 55 are arranged. Are arranged adjacent to each other via a lower right oblique line 153, and one side of the anisotropic diffuse reflector 55 and one side of the anisotropic diffuse reflector 52 are arranged adjacent to each other via an upper left oblique line 154. Yes.

  The isotropic diffusive reflector includes a resin layer including a concavo-convex structure region in which a plurality of concave portions or convex portions are two-dimensionally arranged on one main surface, and is supported by the one main surface, and at least the concavo-convex structure region. It has a structure including a reflective layer that partially covers, and emits isotropic diffused light in which the spread of diffused light is substantially constant depending on the direction. For example, in the surface relief structure used as the anisotropic diffuse reflector in the present invention, it can be realized by making the pitch of the unevenness in a certain direction and the pitch in the direction perpendicular to the pitch substantially the same. . In this case, the same structure as the anisotropic diffuse reflector can be used for the configuration of the reflective layer, the material used, and the like.

Furthermore, one side of the isotropic diffuse reflector 56 and one side of the anisotropic diffuse reflector 52 are arranged adjacent to each other via the upper horizontal line 155, and one side of the isotropic diffuse reflector 56 is anisotropic diffusely reflected. One side of the body 53 is arranged adjacent to the left vertical line 156, and one side of the isotropic diffuse reflector 56 and one side of the anisotropic diffuse reflector 54 are arranged adjacent to each other via the lower horizontal line 157. In addition, one side of the isotropic diffuse reflector 56 and one side of the anisotropic diffuse reflector 55 are arranged adjacent to each other via the right vertical line 158, and the sides of the adjacent anisotropic diffuse reflectors are arranged. Have the same length.

  That is, the image display body 50 in FIG. 5 uses an image obtained by cutting a pyramidal quadrangular pyramid with a plane parallel to the bottom surface. In this figure, an isotropic diffuse reflector 56 is diffused in a different direction on each of the four surfaces around the isotropic diffuse reflector 52, 53, 54, in the central plane. 55 is installed.

  Among these, the isotropic diffuse reflector 56 used for the central surface corresponds to a glossy surface parallel to the surface of the image forming body, and therefore corresponds to the light direction of the glossy surface (1) to (5). ) Is satisfied. On the other hand, the surrounding anisotropic diffuse reflectors 52, 53, 54, and 55 similarly satisfy the conditions (1) to (5). In addition, the isotropic diffuse reflector appears bright only in the vicinity of the regular reflection direction and has a brightness different from that of the anisotropic reflector, so the condition (6) is also satisfied.

  For this reason, even in such a configuration, the brightness distribution of a polyhedron having a relatively small depth and strong gloss can be expressed well. For this reason, an image with sufficient stereoscopic effect can be obtained. In this example, the surface parallel to the surface of the image forming body is replaced with an isotropic diffusion surface, but the replaced surface is not necessarily a parallel surface. Moreover, although the square is represented in this figure, you may represent a rectangular parallelepiped or another square. Further, a plurality of aggregates of the aforementioned anisotropic diffuse reflectors may be arranged in a matrix to form an image forming body.

  FIG. 6 is a schematic diagram illustrating an example of an image forming body that displays a stereoscopic image. It has a quadrangular anisotropic diffuse reflector 62, a quadrangular anisotropic diffuse reflector 63, and a quadrangular anisotropic diffuse reflector 64, and one side of the anisotropic diffuse reflector 62 and anisotropic diffusion One side of the reflector 63 is arranged adjacently via a vertical line 161, and one side of the anisotropic diffuse reflector 63 and one side of the anisotropic diffuse reflector 64 are arranged adjacently via a diagonal line 162. The one side of the anisotropic diffuse reflector 64 and the one side of the anisotropic diffuse reflector 62 are arranged adjacent to each other with the horizontal line 163, and the lengths of the sides of the adjacent anisotropic diffuse reflectors are the same. It is the structure which is.

  That is, FIG. 6 uses an image obtained by viewing a cube from an oblique direction or an image obtained by combining them as a polyhedral image. In such a diagram, for example, if anisotropic diffuse reflectors 62, 63, 64 that spread widely in three different directions are installed on each of the three surfaces, an image that allows a three-dimensional cube image to be observed. Become a formed body. The cube image has an advantage that it is comparatively easy to observe and has a three-dimensional feeling because it is familiar. In addition, various solids may be displayed by combining triangles and quadrilaterals, and a plurality of the above-described anisotropic diffuse reflector assemblies may be positioned in a matrix to form an image forming body.

  FIG. 7 is a schematic diagram illustrating an example of an image forming body that displays a stereoscopic image, and is an application example of the image forming body of FIG. 6. As the polyhedron image, an image obtained by viewing a rectangular parallelepiped from an oblique direction or an image obtained by combining them is used. For example, if anisotropic diffuse reflectors 72, 73, and 74 that are spread widely in three different directions are installed on each of the three surfaces, an image forming body that can observe a three-dimensional rectangular parallelepiped image can be obtained. The rectangular parallelepiped has the advantage that it can easily express various images compared to a cube. In addition, various solids may be displayed by combining triangles and quadrilaterals, and a plurality of the above-described anisotropic diffuse reflector assemblies may be positioned in a matrix to form an image forming body.

  FIG. 8 is a schematic diagram illustrating an example of an image forming body that displays a stereoscopic image. A trapezoidal anisotropic diffuse reflector 82, a triangular anisotropic diffuse reflector 83, a trapezoid anisotropic diffuse reflector 84, and a triangular fourth anisotropic diffuse reflector 85; One side of the anisotropic diffuse reflector 82 and one side of the anisotropic diffuse reflector 83 are arranged adjacently via an upper left oblique line 181, and one side of the anisotropic diffuse reflector 83 and the anisotropic diffuse reflector 84 are One side is adjacently arranged via the lower left oblique line 182, and one side of the anisotropic diffuse reflector 84 and one side of the anisotropic diffuse reflector 85 are adjacently arranged via the lower right oblique line 184. One side of the anisotropic diffuse reflector 85 and one side of the anisotropic diffuse reflector 82 are arranged adjacent to each other via the upper left oblique line, and one side of the anisotropic diffuse reflector 82 and one side of the anisotropic diffuse reflector 84 are arranged. Are arranged adjacent to each other through a horizontal line 185, and the lengths of the sides of the adjacent anisotropic diffuse reflectors are the same. And it has a certain structure.

  That is, FIG. 8 uses an image of a roof-like shape viewed from above or an image obtained by combining them as a polyhedral image. For example, if anisotropic diffuse reflectors 82, 83, 84, and 85 that spread widely in four different directions are installed on each of the four surfaces, an image or the like in which the central line portion protrudes can be observed. It becomes a display that can. In the case of this graphic, there is an advantage that various images can be easily expressed by combination. In addition, various three-dimensional shapes may be displayed by combining triangles, quadrangles, and trapezoids, or a plurality of aggregates of the aforementioned anisotropic diffuse reflectors may be positioned in a matrix to form an image forming body.

  FIG. 9 is a schematic diagram illustrating an example of an image forming body that displays a stereoscopic image. FIG. 9A shows an image forming body 90 having an image in which a trapezoid is arranged around a polygon corresponding to the letter “convex”. In this figure, the direction of the perpendicular line drawn from the polyhedron to the lower side of each trapezoid is the upward direction for surfaces A, C, and G, the right direction for surfaces B and D, the downward direction for surfaces E, and the left for surfaces F and H. It has become a direction.

FIG. 9B is a diagram in which an isotropic diffuse reflector and an anisotropic diffuse reflector are disposed on each surface of FIG. 9A. 9B, the surfaces A, C, and G have an anisotropic diffuse reflector 92 that extends widely in the same direction, the surfaces B and D have an anisotropic diffuse reflector 93, and the surface E has An anisotropic diffuse reflector 93 is disposed on the surfaces F and H, respectively.
In this way, when observing, for example, the A, C, and G planes are observed with the same brightness.
Here, as a stereoscopic image, for example, when the word “convex” protrudes, these surfaces correspond to surfaces of the same angle facing upward, so that they are observed with substantially the same brightness.
On the other hand, when the surface A and the surface B are viewed, since anisotropic diffusers that are widely spread in different directions are arranged, these surfaces appear to have different brightness when observed.
In the case of a three-dimensional shape with protruding characters, these faces look different from each other because they face upward and to the right.
Therefore, it appears as a solid in which the letter “convex” protrudes.

  FIG. 10 is a schematic diagram illustrating an example of an image forming body. Trapezoid anisotropic diffuse reflector 202, trapezoid anisotropic diffuse reflector 203, trapezoid anisotropic diffuse reflector 204, trapezoid anisotropic diffuse reflector 205, trapezoid anisotropic diffusion A reflector 206, a trapezoidal anisotropic diffuse reflector 207, a hexagonal isotropic diffuse reflector 208 that emits isotropic diffuse light, and one side of the anisotropic diffuse reflector 202; One side of the anisotropic diffuse reflector 203 is arranged adjacent to the upper left oblique line 211, and one side of the anisotropic diffuse reflector 203 and one side of the anisotropic diffuse reflector 204 are arranged via the lower left oblique line 212. Anisotropic diffuse reflector 204 and one side of anisotropic diffuse reflector 205 are arranged adjacent to each other via underline 213, and are anisotropic to one side of anisotropic diffuse reflector 205. One side of the diffusive diffuse reflector 206 is arranged adjacently via a lower right oblique line 214, and is anisotropic. One side of the diffuse reflector 206 and one side of the anisotropic diffuse reflector 207 are arranged adjacent to each other via the upper right oblique line 215, and one side of the anisotropic diffuse reflector 207 and one side of the anisotropic diffuse reflector 202 are Are arranged adjacent to each other via an upper line 216.

Furthermore, one side of the isotropic diffuse reflector 208 and one side of the anisotropic diffuse reflector 202 are arranged adjacent to each other via the middle left lower oblique line 221, and one side of the isotropic diffuse reflector 208 is anisotropically diffused. One side of the reflector 203 is arranged adjacently via the middle left vertical line 222, and one side of the isotropic diffuse reflector 208 and one side of the anisotropic diffuse reflector 204 are adjacent via the middle upper left oblique line 223. And arranged
One side of the isotropic diffusive reflector 208 and one side of the anisotropic diffusive reflector 205 are arranged adjacent to each other via a middle upper right oblique line 224, and one side of the isotropic diffusive reflector 208 and the anisotropic diffuse reflector are One side of 206 is adjacently arranged via a middle right vertical line 225, and one side of the isotropic diffuse reflector 208 and one side of the anisotropic diffuse reflector 207 are adjacent via a middle right lower oblique line 226. The lengths of the sides of the adjacent anisotropic diffuse reflectors are the same.

That is, the image display body 200 in FIG. 10 uses an image obtained by cutting a hexagonal pyramid with a plane parallel to the bottom surface. In this figure, isotropic diffuse reflectors 208, 203, 204, 205 are diffused widely in different directions on each of the six surfaces surrounding the isotropic diffuse reflector 208 on the central surface. 206, 207 are installed. If the orientation of the long side of the concave or convex portion RP in the concavo-convex structure region of the anisotropic diffuse reflector 202 is 0 °, the anisotropic diffuse reflector 203 is 30 ° and the anisotropic diffuse reflector 204 is 60. The anisotropic diffuse reflector 205 is 90 °, the anisotropic diffuse reflector 206 is 120 °, and the anisotropic diffuse reflector 207 is 150 °.
In the case of such an image forming body, since the shape of the central surface can be changed in various ways, there is an advantage that expression is rich. This time, the center plane is shown only for convex and hexagonal shapes, but a triangle, quadrangle, rhombus, etc. are selected as appropriate according to the purpose.

  Although not shown in the figure this time, the above-described image forming bodies may be used as one aggregate and a plurality of aggregates may be arranged. Further, a plurality of types of aggregates may be appropriately combined. It is also possible to reproduce a more complicated stereoscopic image by changing the pitch and density of the array of each aggregate. They may be appropriately selected depending on the purpose and application.

  Although not shown here, as an example of the present invention, the first anisotropic diffuse reflector having a triangle, square, or rectangle and a second anisotropic diffuse reflector having a triangle, square, or rectangle are provided. A structure in which one side of the anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other, and the length of the side of each adjacent anisotropic diffuse reflector is the same May be used as an image forming body. As a result, a solid such as a triangular pyramid or a rectangular parallelepiped is viewed from the side, and a solid with two depths can be expressed.

  Next, a method for manufacturing the image forming body will be described. For example, the image forming body can be formed through a process as shown in FIG.

  The laser beam 4 irradiated from the light source is spread by the lens 5 and irradiated to the diffusion plate 6. The light diffused by the diffusion plate 6 passes through a mask 7a having a rectangular opening.

  The mask 7a is a mask for defining the concavo-convex shape of the anisotropic scattering reflector, and FIG. 13 is a schematic diagram showing an example of the mask used in the process of creating the image forming body of the present invention. For example, a mask provided with a rectangular opening as shown in FIG.

  The light that has passed through the mask 7a forms a speckle pattern by the interference of laser light. At this time, a fine pattern is formed in the long side direction of the mask 7a having a rectangular opening, and a rough pattern is formed in the short knitting direction.

  The light formed by the mask 7a passes through the mask 7b. The mask 7b is a mask that defines the planar shape of the anisotropic scattering reflector, and for example, a mask provided with a triangular opening as shown in FIG. 13B is used.

  The light that has passed through the mask 7 b reaches the dry plate 8. The dry plate 8 is coated with a photosensitive material. When a material that can record light intensity with unevenness, such as a photoresist, is used as the photosensitive material, this speckle pattern is recorded as unevenness, so that an uneven structure with different pitches in two orthogonal directions can be recorded.

  Through the above steps, a dry plate 8 having an uneven pattern shape and an area having an uneven pattern was obtained. An embossed original plate is prepared by a known method such as a metal mold based on the above dry plate, and the uneven shape of the embossed original plate is pressure-transferred to a resin layer laminated on the substrate by a known method such as heated embossing. An anisotropic diffuse reflector as shown in FIG. 1 can be produced by replicating the concave-convex pattern and depositing a metal such as aluminum.

  Further, as in the present invention, an image forming body in which these anisotropic diffusers are arranged in different directions is rotated by rotating the mask 7a when, for example, an uneven pattern is exposed on a photosensitive material. The direction of the concavo-convex pattern can be changed. Further, the area of the concavo-convex pattern can be adjusted by rotating the mask 7b.

  Furthermore, the image forming body of the present invention can be obtained by creating a plurality of embossed original plates of anisotropic diffuse reflectors with adjusted concavo-convex pattern orientations and areas having concavo-convex patterns by the above manufacturing method, and combining them. Can do.

In addition, although not shown this time, instead of the dry plate 8 of FIG. 12, a resin layer 13 is laminated on one surface of the substrate 11 and a photosensitive material is applied on the surface, and direct exposure is performed. You can go. After the exposure, a concavo-convex pattern may be directly formed on the resin layer using a photolithography process or an embossing process. In order to change the direction of the concavo-convex pattern and the area having the concavo-convex pattern, the image forming body may be obtained by adjusting the mask 7a and the mask 7b and repeating the above steps.

  In the above description, a method of manufacturing using a laser is described. However, in addition to this, a method of manufacturing an anisotropic diffuser by drawing using an electron beam or a shape by direct cutting is prepared. There is also a way to go.

  In the case of using not only an anisotropic diffuse reflector but an isotropic diffuse reflector, the isotropic diffuse reflector is produced by the following method, for example.

In the same optical system of FIG. 12 used for the production of the anisotropic diffuse reflector, for example, a mask 7c having a circular opening as shown in FIG. 13C is placed at the position of the mask 7b. In this case, the speckle pattern formed by the interference of light that has passed through the mask 7a has substantially the same pitch regardless of the direction because the mask 7a is circular.
For this reason, if a material capable of recording the light intensity with unevenness, such as a photoresist, is used as the photosensitive material for the dry plate 8, the speckle pattern is recorded as unevenness. Will be recorded.
An isotropic diffuse reflector can be obtained by making a replica from the dry plate on which the unevenness is recorded in the same manner as the anisotropic diffuse reflector.
Also, an image forming body in which these are arranged is produced by performing exposure recording while sequentially changing the masks 7a and 7b in the system of FIG. 12, as in the case of arranging an anisotropic diffuse reflector. can do

  A photosensitive material photoresist (AZP1350) was applied on a glass substrate with a spin coater, and a photoresist layer was formed through prebaking drying.

As in the optical system shown in FIG. 12, an argon laser (488 nm) is used as a laser light source, and a light-shielding mask and a diffusion plate for forming an uneven shape are overlapped, and a glass substrate on which each layer is applied as described above. A light-shielding mask for forming a convex portion was placed on the photoresist layer side, and a laser beam was diffused through the lens to record a concave-convex shape.
Note that the mask overlaid on the diffusion plate is as shown in FIG. 13a, and the size of the opening is 10 × 1 cm. Further, ground glass is used for the diffusion plate. Further, a light shielding mask as shown in FIG.

Next, the light shielding mask 7a overlaid on the diffusion plate is rotated by 45 °, and the light shielding mask 7b overlaid on the photoresist dry plate is rotated by 90 ° so that the previously exposed region and the oblique side of the mask opening overlap. Exposure was performed in such a state, and the uneven shape was recorded in this region.
By repeating the same process, exposure was repeated so that a pyramidal structure as shown in FIG. 3 was obtained.

After the above exposure was completed, the photographed photoresist dry plate was developed with an alkaline developer, and then a mold was prepared by a plating process based on this dry plate.
And it emboss-molded on the resin film using this metal mold | die.

  Thus, when Al vapor deposition was performed on the resin layer in which the unevenness | corrugation was formed, the image forming body which appeared popping out in the shape of a pyramid was able to be created.

  By using the technology of the present invention, there is a limitation in the image that can be expressed, but it is possible to provide an image forming body in which the thickness of the image forming body can be made sufficiently thin and image quality deterioration due to the influence of illumination light is small. it can. For this reason, there is a possibility that it can be widely used as a design for security products and various products.

DESCRIPTION OF SYMBOLS 1 ... Observer 2 ... Range of reflected light, 2a ... Regular reflection, 2b ... Diffuse light to the front, 3 ... Range of reflected light, 3a ... Regular reflection, 3b ... Diffuse light to the front, 4 ... Light source, DESCRIPTION OF SYMBOLS 5 ... Diffusing lens, 6 ... Diffusing plate, 7a ... Mask, 7b ... Mask, 7c ... Mask, 8 ... Dry plate, 9 ... Irradiation light, 10 ... Image forming body, 11 ... Base material, 12 ... Anisotropic diffuse reflector DESCRIPTION OF SYMBOLS 13 ... Resin layer, 14 ... Reflective layer, 15 ... Convex part, 16 ... Illumination light, 17 ... Lens, 18 ... Light-shielding part, 19 ... Opening part, 20 ... Image forming body, 21 ... Base material, 22 ... Convex part An anisotropic diffuse reflector in which the direction of the projection is arranged at 0 °, 23... An anisotropic diffuse reflector in which the direction of the convex portion is arranged at 45 °, 24. An anisotropic diffusion in which the direction of the convex portion is arranged at 90 ° Reflector, 25... Anisotropic diffuse reflector in which the direction of the convex part is arranged at 135 °, 26... Convex part, 27. Convex part, 28. Convex part, 29 ... convex part, 30. Formed body 32. Anisotropic diffuse reflector in which the direction of the convex part is arranged at 0 °, 33 ... An anisotropic diffuse reflector in which the direction of the convex part is arranged at 45 °, 34 ... The direction of the convex part is 90 ° Anisotropy diffuse reflector arranged in 35, 35. Anisotropic diffuse reflector arranged in a direction of convex part at 135 °, 50... Image forming body, 52. Anisotropy in which the direction of convex part is arranged at 0 ° Diffuse reflector, 53... An anisotropic diffuse reflector in which the direction of the convex portion is arranged at 45 °, 54... An anisotropic diffuse reflector in which the direction of the convex portion is arranged at 90 °, 55. An anisotropic diffuse reflector arranged at °, 56 ... an isotropic diffuse reflector, 60 ... an image forming body, 62 ... an anisotropic diffuse reflector arranged at 0 ° with respect to the direction of the convex part, 63 ... a convex part An anisotropic diffuse reflector in which the direction of the projection is arranged at 45 °, 64... An anisotropic diffuse reflector in which the direction of the projection is arranged at 90 °, 70... An image forming body, 72. Is an anisotropic diffuse reflector in which the directions of the convex portions are arranged at 45 °, and 74 is an anisotropic diffuse reflector in which the directions of the convex portions are arranged at 90 °. 80 ... an image forming body, 82 ... an anisotropic diffuse reflector in which the direction of the convex part is arranged at 0 °, 83 ... an anisotropic diffuse reflector in which the direction of the convex part is arranged at 45 °, 84 ... of the convex part Anisotropic diffuse reflector in which direction is arranged at 90 °, 85... Anisotropic diffuse reflector in which direction of convex portion is arranged at 135 °, 90... Image forming body, 92. Anisotropy diffuse reflector 93 ... Anisotropic diffuse reflector in which the direction of the convex part is arranged at 45 °, 94 ... An anisotropic diffuse reflector in which the direction of the convex part is arranged at 90 °, 95 ... The convex part Anisotropy diffuse reflector arranged at 135 °, 96 ... isotropic diffuse reflector, 131 ... upper left oblique line, 132 ... lower left oblique line, 133 ... lower right oblique line, 1 4 ... upper left oblique line, 151 ... upper left oblique line, 152 ... lower left oblique line, 153 ... lower right oblique line, 154 ... upper left oblique line, 155 ... upper horizontal line, 156 ... left vertical line, 157 ... lower horizontal line, 158 ... right vertical line, 161 ... Vertical line, 162 ... oblique line, 163 ... horizontal line, 181 ... upper left oblique line, 182 ... lower left oblique line, 183 ... lower right oblique line, 184 ... upper right oblique line, 185 ... horizontal line, 200 ... image forming body, 202 ... anisotropic diffuse reflector , 203 ... anisotropic diffuse reflector, 204 ... anisotropic diffuse reflector, 205 ... anisotropic diffuse reflector, 206 ... anisotropic diffuse reflector, 207 ... anisotropic diffuse reflector, 208 ... isotropic Diffusive reflector, 211 ... upper left oblique line, 212 ... lower left oblique line, 213 ... lower line, 214 ... lower right oblique line, 215 ... upper right oblique line, 216 ... upper line, 221 ... middle lower left oblique line, 222 ... middle left vertical line, 223 ... middle Upper left diagonal, 224 ... Middle upper right diagonal, 225 ... Middle right vertical line, 226 ... Middle right lower diagonal line

Claims (14)

A resin layer including a concave-convex structure region in which a plurality of concave portions or convex portions are two-dimensionally arranged on one main surface;
An anisotropy supported on the one main surface and having a reflective layer covering at least a part of the concavo-convex structure region, and diffuses widely in a specific direction and diffuses narrowly in a direction perpendicular to the specific direction. An anisotropic diffuse reflector that emits diffused light of
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
Of the anisotropic diffuse reflectors arranged adjacent to each other, a direction in which diffused light emitted by one adjacent anisotropic diffuse reflector is diffused widely and another anisotropic diffuse reflector adjacent to each other are An image forming body characterized in that the diffused light to be emitted has different directions of wide diffusion. A resin layer including, on one main surface, a concavo-convex structure region having a plurality of concave portions or convex portions arranged in first and second directions intersecting each other;
An anisotropic diffuse reflector that emits anisotropic diffused light in a specific direction, which is supported by the one main surface and includes a reflective layer that covers at least a part of the uneven structure region,
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
When observed from a third direction perpendicular to the first and second directions, the direction in which diffused light emitted by one adjacent anisotropic diffuse reflector is diffused widely and the other anisotropy adjacent to each other An image forming body characterized in that the diffused light emitted from the diffuse reflector is different in the direction in which it is diffused widely.   The plurality of concave portions or convex portions arranged in the concavo-convex structure region are arranged in substantially the same direction in each of the anisotropic diffuse reflectors. Image forming body. A resin layer including, on one main surface, a concavo-convex structure region having a plurality of concave portions or convex portions arranged in first and second directions intersecting each other;
An anisotropic diffuse reflector that emits anisotropic diffused light in a specific direction, which is supported by the one main surface and includes a reflective layer that covers at least a part of the uneven structure region,
Laminated from the other main surface of the resin layer on a base material, a plurality of adjacent image forming bodies,
The plurality of recesses or projections arranged in the uneven structure region are arranged in the same direction,
The direction of a plurality of recesses or projections provided in one adjacent anisotropic diffuse reflector is different from the direction of a plurality of recesses or projections provided in the other adjacent anisotropic diffuse reflector Image forming body. The image forming body is:
The image forming body includes a resin layer including a concavo-convex structure region in which a plurality of concave portions or convex portions are two-dimensionally arranged on one main surface;
It has a structure including a reflective layer that is supported on the one main surface and covers at least a part of the concavo-convex structure region, and emits isotropic diffused light whose diffusion method is almost constant depending on the direction. With an isotropic diffuse reflector
The image forming body according to claim 1, wherein the image forming body is disposed adjacent to at least one anisotropic diffuse reflector. The image forming body according to any one of claims 1 to 5,
An image forming body, wherein a projected image corresponding to a three-dimensional object constituted by a combination of a plurality of planes is observed as an image when observed from a certain direction. The image forming body according to claim 1, wherein the uneven region has a relief structure. The anisotropic diffuser is
In the wide diffusion direction, the half-value angle at which the intensity of the diffused light is half that of the regular reflection direction is 30 ° or more,
The image forming body according to any one of claims 1 to 7, wherein a half-value angle is 15 ° or less in a narrow diffusion direction. The image forming body according to claim 1, wherein
A triangular first anisotropic diffuse reflector;
A triangular second anisotropic diffuse reflector;
A triangular third anisotropic diffuse reflector;
A triangular fourth anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through an upper right diagonal line,
An image forming body, wherein the lengths of the sides of adjacent anisotropic diffuse reflectors are the same. The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A trapezoidal second anisotropic diffuse reflector;
A trapezoidal third anisotropic diffuse reflector;
A trapezoidal fourth anisotropic diffuse reflector;
A rectangular, isotropic diffuse reflector that emits isotropic diffused light,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper left diagonal line,
One side of the isotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through an upper horizontal line,
One side of the isotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a left vertical line,
One side of the isotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other via a lower horizontal line,
One side of the isotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through a right vertical line,
An image forming body, wherein the lengths of the sides of adjacent anisotropic diffuse reflectors are the same. The image forming body according to claim 1, wherein
A parallelogram first anisotropic diffuse reflector;
A parallelogram-shaped second anisotropic diffuse reflector;
A parallelogram-shaped third anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a vertical line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through diagonal lines,
One side of the third anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to a horizontal line,
An image forming body, wherein the lengths of the sides of adjacent anisotropic diffuse reflectors are the same. The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A second anisotropic diffuse reflector of triangle or quadrangle;
A trapezoidal third anisotropic diffuse reflector;
A triangular or quadrangular fourth anisotropic diffuse reflector,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other via a lower right oblique line,
One side of the fourth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper left diagonal line,
One side of the first anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a horizontal line,
An image forming body, wherein the lengths of the sides of adjacent anisotropic diffuse reflectors are the same. An image forming body in which one plane of a three-dimensional object constituted by a combination of a plurality of planes is observed from a normal direction, and a projection image in which a plurality of side surfaces surround the plane is recorded,
The plane observed from the normal direction is a polygon having a plurality of sides,
The side surface is selected from either a trapezoid or a parallelogram, and is adjacent to each side of the plane via an upper side,
Each side surface has the same distance between the upper side and the lower side, and adjacent side surfaces have the same length of each side, and are arranged sharing the side sides,
2. An anisotropic diffuse reflector having the same direction of emitting anisotropic diffused light is used for the side surface in which the direction of the line to be dropped perpendicularly to the lower side of each side surface is the same. The image forming body according to any one of 8. The image forming body according to claim 1, wherein
A trapezoidal first anisotropic diffuse reflector;
A trapezoidal second anisotropic diffuse reflector;
A trapezoidal third anisotropic diffuse reflector;
A trapezoidal fourth anisotropic diffuse reflector;
A trapezoidal fifth anisotropic diffuse reflector;
A trapezoidal sixth anisotropic diffuse reflector;
Hexagonal, has an isotropic diffuse reflector that emits isotropic diffused light,
One side of the first anisotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other via an upper left oblique line,
One side of the second anisotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a lower left oblique line,
One side of the third anisotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through an underline,
One side of the fourth anisotropic diffuse reflector and one side of the fifth anisotropic diffuse reflector are arranged adjacent to each other through a lower right oblique line,
One side of the fifth anisotropic diffuse reflector and one side of the sixth anisotropic diffuse reflector are arranged adjacent to each other through an upper right diagonal line,
One side of the sixth anisotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other via an upper line,
The isotropic diffuse reflector is
One side of the isotropic diffuse reflector and one side of the first anisotropic diffuse reflector are arranged adjacent to each other through a middle lower left oblique line,
One side of the isotropic diffuse reflector and one side of the second anisotropic diffuse reflector are arranged adjacent to each other through a middle left vertical line,
One side of the isotropic diffuse reflector and one side of the third anisotropic diffuse reflector are arranged adjacent to each other through a middle upper left oblique line,
One side of the isotropic diffuse reflector and one side of the fourth anisotropic diffuse reflector are arranged adjacent to each other through a middle upper right vertical line,
One side of the isotropic diffuse reflector and one side of the fifth anisotropic diffuse reflector are arranged adjacent to each other through a middle right vertical line,
One side of the isotropic diffuse reflector and one side of the sixth anisotropic diffuse reflector are arranged adjacent to each other via a middle right lower vertical line,
An image forming body, wherein the lengths of the sides of adjacent anisotropic diffuse reflectors are the same.