JPH0962171A - Production of hologram color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the unnecessary interference fringes occurring due to unnecessary reflection, etc., between both surfaces of an original plate hologram and between the original plate hologram and a hologram photosensitive material at the time of producing a hologram color filter by duplication. SOLUTION: The hologram color filter is produced by superposing the hologram photosensitive material 8 on the relief type computer hologram original plate 7 and making a laser beam 9 incident thereon from an original plate 7 side, thereby duplicating the hologram. In such a case, a wedge-shaped transparent member 15 is superposed on the incident side of the original plate 7 to make the incident side surface of the original plate 7 and the exit side surface thereof non-parallel with each other, thereby, the light (2) reflected by the incident side surface of the transparent member 15 and the light (1) advancing rectlinearly in the hologram original plate 7 are non-paralleled. Even if both light rays interfere with each other on the photosensitive layer 13, the interference fringes of a relatively narrow spacing are formed. These interference fringes are obscure even if these fringes overlap on the displayed images. The degradation in the display quality is thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a hologram color filter, and more particularly, to a hologram in which unnecessary interference fringes caused by unnecessary reflection at an interface are reduced when a hologram color filter is manufactured by duplication from a computer generated hologram. The present invention relates to a method for manufacturing a color filter.

[0002]

2. Description of the Related Art As one hologram array, the present applicant has proposed a hologram color filter for a liquid crystal display device in Japanese Patent Application No. 5-12170. The structure is composed of an eccentric Fresnel zone plate-shaped micro hologram array. The hologram color filter will be briefly described below.

A liquid crystal display device using this hologram color filter will be described with reference to the sectional view of FIG. In the figure, a hologram array 5 constituting this hologram color filter is arranged at a distance from the backlight 3 incident side of a liquid crystal display element 6 which is regularly divided into liquid crystal cells 6 '(pixels). On the back of the liquid crystal display element 6,
A black matrix 4 provided between the liquid crystal cells 6'is arranged. In addition to the above, polarizing plates (not shown) are arranged on both sides of the liquid crystal display element 6. It should be noted that an absorption type color filter that transmits light of colors corresponding to R, G, and B color separation pixels is arranged between the black matrix 4 as in the conventional color liquid crystal display device. Is also good.

The hologram array 5 has a repetition period of R, G, and B color separation pixels, that is, a set of three liquid crystal cells 6 ′ adjacent to each other in the direction of the liquid crystal display element 6 in the plane of the paper. The micro holograms 5 'are arranged in an array at the same pitch as the repetition pitch. The micro holograms 5' are aligned with each set of three liquid crystal cells 6 'adjacent to each other in the direction of the plane of the liquid crystal display element 6, and each hologram 5' Each of the micro holograms 5 ′ corresponds to the light of the green component in the backlight 3 that enters at an angle θ with respect to the normal to the hologram array 5 and corresponds to the micro hologram 5 ′. It is formed in a Fresnel zone plate shape so that light is condensed on the liquid crystal cell G at the center of the three color separation pixels R, G, and B. The micro hologram 5 ′ has a relief type, which has no or little wavelength dependence of the diffraction efficiency.
It consists of transmission holograms such as phase type and amplitude type. Here, the fact that there is no or little wavelength dependence of the diffraction efficiency is not a type that diffracts only a specific wavelength and does not diffract other wavelengths like a Lippman hologram,
Means that one diffraction grating diffracts any wavelength,
The diffraction grating having a small wavelength dependence of the diffraction efficiency diffracts at different diffraction angles according to the wavelength.

[0005] With such a configuration, when the white backlight 3 that enters at an angle θ with respect to the normal line from the surface of the hologram array 5 opposite to the liquid crystal display element 6 is incident, the wavelength is reduced. Accordingly, the diffraction angle of the minute hologram 5 'is different, and the light condensing position for each wavelength is dispersed in a direction parallel to the hologram array 5 surface. Among them, the red wavelength component is located at the position of the liquid crystal cell R displaying red, the green component is located at the position of the liquid crystal cell G displaying green, and the blue component is located at the position of the liquid crystal cell B displaying blue. By arranging the hologram array 5 so as to diffract and collect light, each color component passes through each liquid crystal cell 6 ′ with almost no attenuation in the black matrix 4 and the liquid crystal cell 6 ′ at the corresponding position. Color display can be performed according to the state.

As described above, by using the hologram array 5 as a color filter, each wavelength component of the conventional color filter backlight can be made incident to each liquid crystal cell 6'without being absorbed, and its utilization efficiency is improved. Can be significantly improved.

The production of such a color filter composed of a hologram array is performed, for example, by a duplication method using two-beam interference of multipoint convergent light and zero-order transmitted light emitted from a minute hologram lens array composed of a computer hologram (Japanese Patent Application No. Hei 10-26139). 5
-14572). The duplication method will be briefly described with reference to the cross-sectional view of FIG. 6. The hologram interference fringes of the minute hologram 5 ′ are calculated by a computer, and the interference fringes are projected onto a glass substrate coated with an electron beam resist by an electron beam. Draw and develop the relief type computer generated hologram (CGH: Computer Gen)
An array 7 of erased Hologram) 5 ″ is produced. Next, as shown in FIG. 6, the glass substrate 12 is formed on the relief surface of the CGH array 7 thus produced.
A hologram photosensitive material 8 having a photosensitive layer 13 such as a photopolymer provided thereon and a cover film 14 laminated thereon is superposed with a slight gap on the cover film 14 side, and the back side of FIG. A laser beam 9 is incident at an angle θ corresponding to the light 3 to cause the convergent diffracted light 10 generated by each CGH 5 ″ of the CGH array 7 and the linearly transmitted light 11 to interfere with each other in the photosensitive layer 13, and the CGH array 7
Duplicate This duplicated hologram is used as the hologram array 5 in FIG. Further, the hologram array 5 can be manufactured by further duplicating the duplicate hologram as an original.

[0008]

SUMMARY OF THE INVENTION However, CGH
The hologram array 5 produced by the duplication method as shown in FIG. 6 using the array 7 as an original plate has unnecessary reflection on both surfaces of the CGH array 7, unnecessary reflection in the gap between the CGH array 7 and the hologram photosensitive material 8, and the like. Undesired interference fringes resulting from this are overwritten and recorded. This unnecessary interference fringe is the hologram array 5
Of the liquid crystal display device as shown in FIG. 7 in which this hologram color filter is incorporated, the unnecessary interference fringes are seen to overlap the displayed image, and the display quality is deteriorated. .

The present invention has been made in view of the above problems of the prior art, and an object thereof is to prepare both sides of an original hologram, an original hologram and a hologram image when producing a hologram color filter by duplication from an original hologram. It is an object of the present invention to provide a method for reducing unnecessary interference fringes caused by unnecessary reflection at a gap between materials or the like.

[0010]

A method for producing a hologram color filter of the present invention which achieves the above object comprises an array in which condensing element holograms are periodically arranged,
Relief type hologram master plate of hologram color filter that disperses white light incident on each element hologram at an angle with respect to the normal to the recording surface in the direction along the recording surface, or a hologram sensitive material on the master plate. Laser light from the relief hologram original plate side, and the convergent diffracted light generated by each element hologram of the relief hologram original plate and the straight transmitted light are made to interfere in the photosensitive layer of the hologram photosensitive material to be duplicated. The hologram sensitive material is superposed on the hologram duplication first original plate obtained by
In the method for producing a hologram color filter by making a laser beam enter from the side of the relief type hologram original plate or the hologram duplication first original plate to make a duplication, a wedge-shaped transparent film is formed on the incident side of the relief type hologram original plate or the hologram duplication first original plate. The method is characterized in that members on top of each other are arranged such that the surface on the incident side and the surface on the exit side of the relief type hologram original plate or the hologram duplication first original plate are not parallel to each other.

Another method for manufacturing a hologram color filter of the present invention is the surface of the relief type hologram master plate or the first plate of the hologram duplication side on the incident side, the surface on the exit side,
The method is characterized in that an antireflection film or a light absorption film is provided on at least one surface of the hologram light-sensitive material on the incident side.

Yet another method for producing a hologram color filter according to the present invention is characterized in that the relief-type hologram original plate or the hologram duplication first original plate and the hologram photosensitive material are superposed at an angle to each other. is there.

Another method for producing a hologram color filter according to the present invention is characterized in that an incident angle of the laser beam is set to an angle near a Brewster's angle of the relief hologram original plate or the hologram duplication first original plate. Is.

Another method for producing a hologram color filter of the present invention comprises an array in which condensing element holograms are periodically arranged, and each element hologram is incident at an angle with respect to the normal to the recording surface. The hologram photosensitive material is superposed on the relief type hologram master plate of the hologram color filter that disperses the white light wavelength-dispersed in the direction along the recording surface, and laser light is incident from the relief type hologram master plate side, and the relief hologram master plate The hologram diffractive material is superposed on the hologram duplication first original plate obtained by interfering the convergent diffracted light generated by each element hologram and the straight transmitted light in the photosensitive layer of the hologram diffractive material, and the hologram duplicating first 1 How to make a hologram color filter by making a laser beam enter from the original side and reproducing it In the hologram replicating first
The method is characterized in that the original plate and the hologram photosensitive material are superposed with an absorptive refractive index matching liquid interposed therebetween.

The present invention also includes a method for producing a hologram color filter that employs any two or more of the above methods at the same time.

In the present invention, when the original hologram and the hologram photosensitive material are superposed for duplication, the interfaces for performing unnecessary reflection are made non-parallel to each other so that the intervals of unnecessary interference fringes are narrowed to make them inconspicuous. Use either a hologram color filter because it reduces reflection at the interface to reduce the generation of unnecessary interference fringes, or reduces the intensity of unnecessary interference fringes relative to the normally recorded interference fringes. In the conventional liquid crystal display device, unnecessary interference fringes can be reduced, the display quality is improved, and the diffraction efficiency is also improved.

[0017]

DETAILED DESCRIPTION OF THE INVENTION There are three basic principles of the present invention. The first is a method of making the interfaces of unnecessary reflections non-parallel to each other when the original hologram and the hologram photosensitive material are superposed to make the intervals of the unnecessary interference fringes inconspicuous. The second is a method of reducing the reflection at the interface to reduce the generation of unnecessary interference fringes. The third is to reduce the intensity of unnecessary interference fringes with respect to the interference fringes that are normally recorded.

Hereinafter, these methods will be sequentially described with reference to the drawings. FIG. 1 shows an arrangement in which the intervals of unnecessary interference fringes due to the interference between the light reflected on both surfaces of the CGH master plate 7 and the directly transmitted light are narrowed to make them inconspicuous. That is, on the relief surface 17 of the CGH master 7, a hologram photosensitive material 8 in which a photosensitive layer 13 such as a photopolymer is provided on a glass substrate 12 and a cover film 14 is laminated thereon is slightly provided on the cover film 14 side. Laser light 9 corresponding to the backlight 3 in FIG.
To make the convergent diffracted light generated by each CGH of the CGH master 7 interfere with the linearly transmitted light in the photosensitive layer 13,
CGH original version 7 is duplicated. This duplication is similar to the conventional case of FIG. At this time, light incident from the incident side surface (upper surface in the figure) of the CGH original plate 7 is partially reflected by the relief surface 17 of the CGH original plate 7 and is reflected on the incident side surface (upper surface in the figure). The light enters again and is partially reflected by the surface to become light. This light passes through the relief surface 17 when the both sides of the CGH master 7 are substantially parallel to each other, and the hologram sensitive material 8
Incident on the photosensitive layer 13 and interfere with each other in the photosensitive layer 13 to record unnecessary interference fringes having a relatively wide interval. Then, in the liquid crystal display device as shown in FIG. 7 in which the duplicated hologram color filter is incorporated, the unnecessary interference fringes appear on the display image, and the display quality is degraded.

Therefore, in the case of FIG. 1, a wedge-shaped transparent member, that is, a wedge member 15, whose refractive index is substantially the same as that of the CGH master plate 7 is closely attached to the surface of the CGH master plate 7 on the side where the laser light 9 is incident. . By doing this, the CGH original version 7 is substantially
And the upper surface of the wedge member 15 forming both sides of the
The relief surface 17 of the original plate 7 is no longer parallel, and the light incident on the CGH original plate 7 is partially reflected by the relief surface 17 of the CGH original plate 7 and reflected by the incident side surface (upper surface in the figure) of the wedge member 15. The formed light forms light that forms an angle with each other, and even if the light interferes in the photosensitive layer 13, interference fringes having a relatively narrow interval are recorded. Therefore, the unnecessary interference fringes are not noticeable even if they overlap the display image, and the display quality is not deteriorated. The wedge member 1
5 may not be a separate body, but may be formed integrally with the CGH master plate 7.

Next, FIG. 2 is one of the methods for reducing the reflection at the interface. That is, the CGH master plate 7 and the hologram photosensitive material 8 on both sides of the CGH master plate 7 and the hologram photosensitive material 8 which are overlapped with each other with a slight gap for duplication.
In this example, the antireflection film 16 is arranged on the surface of the cover film 14. In this way, unnecessary reflection does not occur on both sides of the CGH master 7, and unnecessary reflection does not occur in the gap between the CGH master 7 and the hologram photosensitive material 8. No unwanted interference fringes occur. Note that the unnecessary interference fringes can be reduced by providing the antireflection film 16 only on one or both surfaces of the CGH master 7 and the surface of the cover film 14 of the hologram photosensitive material 8.

Regarding the gap between the CGH master plate 7 and the hologram photosensitive material 8, the antireflection film 16 is provided on any surface.
Even if only the ND film (absorption film) is provided on the surface of the cover film 14 or the relief surface 17 without providing the ND film, the intensity of the light reflected by this surface is reduced by the absorption of the ND film. The light that has passed through is reflected by this ND film, reflected by the relief surface 17 of the CGH master 7 or the upper surface of the CGH master 7, and then reflected by the light that has passed through this ND film or the surface of the cover film 14,
After that, the intensity ratio between the light reflected by the ND film and incident on the cover film 14 is reduced, so that the relative ratio of the intensity of the unnecessary interference fringes can be reduced.

When the CGH master plate 7 is duplicated with the arrangement as shown in FIG. 2, the laser beam 9 does not necessarily have to be incident at the angle θ corresponding to the backlight 3. The incident angle can be changed by changing the wavelength of the laser beam 9. This is called angle tuning, and even if the wavelength and incident angle in hologram replication are changed in this way,
It is possible to duplicate the original 7. Therefore, as shown in FIG. 3, P-polarized light (linearly polarized light parallel to the paper surface) is used as the laser light 9.
The CGH master plate 7 is reproduced by changing the wavelength so that the incident angle becomes the Brewster angle θ _B of the CGH master plate 7. Brewster angle theta _B, as is well known, n ₁ the refractive index of the incident side of the interface, when the refractive index of the exit side of the interface between _{n 2, tanθ B = n 2} / n 1 relationship Is an incident angle that satisfies the condition, and at this time, the reflectance of the P-polarized light at the interface is zero. Therefore, if P-polarized light is used as the laser beam 9 for duplicating the CGH master plate 7 and the wavelength is changed so that the incident angle on the CGH master plate 7 becomes the Brewster angle θ _B , the CGH master plate 7 is changed.
Unnecessary reflection does not occur on both sides of the surface, and unnecessary interference fringes due to reflection on both sides do not occur. Moreover, even if the 0th-order light traveling straight through the CGH master 7 is reflected by the cover film 14 on the surface of the hologram photosensitive material 8, it will be incident on both surfaces of the CGH master 7 at the Brewster angle θ _B as well. CG
Even in the gap between the H master 7 and the hologram photosensitive material 8, unnecessary repeated reflection does not occur, and unnecessary interference fringes do not occur. The incident angle of the laser beam 9 is strictly the Brewster angle θ _B
Does not necessarily have to be, and its vicinity, specifically θ _B
Within the range of about ± 5 °, almost no reflection occurs and it is possible to substantially prevent the generation of unnecessary interference fringes.

Next, FIG. 4 shows a CGH master plate 7 and a hologram photosensitive material 8 which are overlapped with a slight gap for reproduction.
Is not perfectly parallel, but a small angle δ, specifically 1 °
It shows an arrangement in which they are inclined by 5 ° or less relative to each other.
With such an arrangement, the light traveling straight through the CGH master 7 and the 0th-order light emitted from the relief surface 17 of the CGH master 7 are reflected by the cover film 14 on the surface of the hologram photosensitive material 8,
The light incident on the relief surface 17 again and the light reflected there forms an angle with each other, and interference fringes having a relatively narrow interval are recorded even if they interfere in the photosensitive layer 13. become. Therefore, unnecessary interference fringes due to repeated reflection in the gap between the CGH original plate 7 and the hologram photosensitive material 8 are not conspicuous even if they overlap the displayed image and do not deteriorate the display quality.

By the way, in the above description, the relief type CGH master plate 7 is assumed as the master plate for hologram duplication, but the hologram sensitive material 8 is superposed on the CGH master plate 7 as shown in FIGS. A hologram (hereinafter, referred to as a hologram duplication first original plate H1) obtained by duplication in an arrangement is used as an original plate, and a hologram photosensitive material 8 is similarly superposed on the hologram duplication first original plate H1 as shown in FIGS. It may be duplicated in any arrangement. Also in these cases, unnecessary interference fringes can be reduced or eliminated.

By the way, when copying from the CGH master 7, it was not possible to do so by interposing a refractive index matching liquid (hereinafter referred to as IMF) between the CGH master 7 and the hologram photosensitive material 8. It has an IMF in between,
This is because the CGH master plate 7 and the relief surface 17 lose the diffracting action, making it impossible to duplicate. However, at the time of duplication from the hologram duplication first original plate H1, since the first original plate H1 is not a relief type hologram but a volume phase type hologram, a space between the hologram duplication first original plate H1 and the hologram photosensitive material 8 is obtained. It is possible to prevent unnecessary reflection by interposing a refractive index matching liquid. At this time, as shown in FIG. 5, when the colored IMF 18 is used as the refractive index matching liquid to be interposed between the hologram duplication first original plate H1 and the hologram photosensitive material 8, the hologram duplication first original plate H1 is used.
The light repeatedly reflected in the gap between the holographic material 8 and the holographic material 8 passes through the colored IMF 18 three or more times, while the light that directly passes through the colored IMF 18 has only one colored IM.
Since the light does not pass through F18, the intensity ratio between the lights capable of interfering with each other is significantly reduced, so that the relative ratio of the intensity of the unnecessary interference fringes is significantly reduced, and the intensity of the unnecessary interference fringes is weakened.

In the case of FIG. 5, the hologram duplication first
In order to prevent repeated reflection in the gap between the original plate H1 and the hologram photosensitive material 8, the cover film 14 of the hologram duplication first original plate H1 facing the gap is further provided.
An antireflection film or an ND film (light absorbing film) 16 is disposed on the surface of the above and the surface of the cover film 14 of the hologram sensitive material 8. This antireflection film or ND film (light absorption film)
The function of 16 is clear from the above description, and therefore its description is omitted. In addition, in the case of FIG. 5, in order to prevent generation of unnecessary interference fringes due to reflection from the surface of the glass base material 12 of the hologram sensitive material 8 opposite to the photosensitive layer 13, the absorption layer 19 is formed on that surface.
Is provided. By providing the absorption layer 19 on the surface of the glass substrate 12 of the hologram sensitive material 8 opposite to the photosensitive layer 13 as described above, unnecessary reflected light from the back surface of the hologram sensitive material 8 can be removed, and unnecessary interference based thereon can be eliminated. The generation of stripes can be prevented. The same applies to FIGS. 1 to 4.

Now, in the above, the original 7, H1 0
Although no mention was made of the ratio between the second-order light and the first-order diffracted light, the ratio of the first-order diffracted light, that is, the diffraction efficiency should be increased in order to reduce unnecessary interference fringes based on the zero-order light. Is clear. Regarding the layer structure of the hologram photosensitive material 8, the cover film 14, the photosensitive layer 13,
It is also clear that the smaller the difference in the refractive index between the glass base materials 12, the less the reflection at the interface and the reduction of unnecessary interference fringes. Desirably, the difference in refractive index between the layers is 0.01
It is the following.

Although the method of reducing the generation of unnecessary interference fringes and the method of making unnecessary interference fringes inconspicuous according to the present invention have been described above, it is obvious that two or more methods may be adopted at the same time.

By the way, the present invention has been described above with respect to a method of reducing or making inconspicuous the generation of unnecessary interference fringes when a hologram color filter is produced by duplication, but the present invention is not limited to the hologram color filter.
It is obvious that the method can be applied to other hologram production methods.

[0030]

As is apparent from the above description, according to the method of manufacturing a hologram color filter of the present invention, when the original hologram and the hologram photosensitive material are superposed for replication, the interface between the unnecessary reflections is reduced. Either make them non-parallel to each other to narrow the intervals of unnecessary interference fringes to make them inconspicuous, or reduce the reflection at the interface to reduce the generation of unnecessary interference fringes, or Since either the intensity is reduced, unnecessary interference fringes can be reduced in the liquid crystal display device using the hologram color filter, the display quality is improved, and the diffraction efficiency is also improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an arrangement for carrying out one embodiment of a method for producing a hologram color filter according to the present invention.

FIG. 2 is a cross-sectional view showing an arrangement for carrying out the manufacturing method of another embodiment.

FIG. 3 is a cross-sectional view showing an arrangement for carrying out the manufacturing method of yet another embodiment.

FIG. 4 is a cross-sectional view showing an arrangement for carrying out the manufacturing method of yet another embodiment.

FIG. 5 is a cross-sectional view showing an arrangement for carrying out the manufacturing method of yet another embodiment.

FIG. 6 is a cross-sectional view for explaining a conventional duplication method.

FIG. 7 is a cross-sectional view of a liquid crystal display device using a hologram color filter.

[Explanation of symbols]

 3 ... Backlight 4 ... Black matrix 5 ... Hologram array (hologram color filter) 5 '... Micro hologram 5 "... CGH 6 ... Liquid crystal display element 6' ... Liquid crystal cell 7 ... CGH array original plate 8 ... Hologram photosensitive material 9 ... Laser Light 10 ... Convergent diffracted light 11 ... Straight transmitted light 12 ... Glass base material 13 ... Photosensitive layer 14 ... Cover film 15 ... Wedge member 16 ... Antireflection film or ND film (absorption film) 17 ... Relief surface 18 ... Coloring refractive index Matching liquid (colored IMF) 19 ... Absorption layer H1 ... Hologram replication first original plate

Claims (6)

[Claims] 1. An array of light-collecting element holograms arranged periodically, wherein each element hologram wavelength-disperses white light incident at an angle with respect to a normal to the recording surface in a direction along the recording surface. Relief hologram master plate of hologram color filter that disperses and disperses, or a hologram sensitive material is superposed on the master plate, and laser light is made incident from the relief hologram master plate side, resulting from each element hologram of the relief hologram master plate The relief-type hologram original plate or the hologram duplication first original plate is formed by superimposing a hologram photosensitive material on a hologram duplication first original plate obtained by interfering diffracted light and linearly transmitted light in a photosensitive layer of the hologram photosensitive material. A method of making a hologram color filter by making laser light enter from the side and duplicating Then, a wedge-shaped transparent member is superposed on the entrance side of the relief type hologram master plate or the hologram duplication first master plate, and the entrance side surface and the exit side surface of the relief type hologram master plate or the hologram duplication first master plate are mutually connected. A method for producing a hologram color filter, which is characterized by making them non-parallel. 2. An array of light-collecting element holograms arranged periodically, wherein each element hologram wavelength-disperses white light incident at an angle to the normal to the recording surface in a direction along the recording surface. Relief hologram master plate of hologram color filter that disperses and disperses, or a hologram sensitive material is superposed on the master plate, and laser light is made incident from the relief hologram master plate side, resulting from each element hologram of the relief hologram master plate The relief-type hologram original plate or the hologram duplication first original plate is formed by superimposing a hologram photosensitive material on a hologram duplication first original plate obtained by interfering diffracted light and linearly transmitted light in a photosensitive layer of the hologram photosensitive material. A method of making a hologram color filter by making laser light enter from the side and duplicating Further, an antireflection film or a light absorption film is provided on at least one surface of the relief type hologram master plate or the entrance side surface of the hologram duplication first master plate side, the exit side surface, and the entrance side surface of the hologram photosensitive material. A method for producing a holographic color filter, characterized by: 3. An array of light-collecting element holograms arranged periodically, wherein each element hologram wavelength-disperses white light incident at an angle with respect to the normal to the recording surface in the direction along the recording surface. Relief hologram master plate of hologram color filter that disperses and disperses, or a hologram sensitive material is superposed on the master plate, and laser light is made incident from the relief hologram master plate side, resulting from each element hologram of the relief hologram master plate The relief-type hologram original plate or the hologram duplication first original plate is formed by superimposing a hologram photosensitive material on a hologram duplication first original plate obtained by interfering diffracted light and linearly transmitted light in a photosensitive layer of the hologram photosensitive material. A method of making a hologram color filter by making laser light enter from the side and duplicating A method for producing a hologram color filter, characterized in that the relief type hologram original plate or the hologram duplication first original plate and the hologram photosensitive material are overlapped with each other at an angle. 4. An array in which condensing element holograms are periodically arranged, and each element hologram wavelength-disperses white light incident at an angle with respect to a normal to the recording surface in a direction along the recording surface. Relief hologram master plate of hologram color filter that disperses and disperses, or a hologram sensitive material is superposed on the master plate, and laser light is made incident from the relief hologram master plate side, resulting from each element hologram of the relief hologram master plate The relief-type hologram original plate or the hologram duplication first original plate is formed by superimposing a hologram photosensitive material on a hologram duplication first original plate obtained by interfering diffracted light and linearly transmitted light in a photosensitive layer of the hologram photosensitive material. A method of making a hologram color filter by making laser light enter from the side and duplicating A method for producing a hologram color filter, wherein the incident angle of the laser light is set to an angle near the Brewster angle of the relief hologram original plate or the hologram duplication first original plate. 5. An array of light-collecting element holograms arranged periodically, wherein each element hologram wavelength-disperses white light incident at an angle with respect to a normal to the recording surface in a direction along the recording surface. The hologram photosensitive material is superposed on the relief type hologram master plate of the hologram color filter that disperses light, and laser light is made incident from the relief type hologram master plate side, and the convergent diffracted light generated by each element hologram of the relief type hologram master plate and straight transmission The hologram photosensitive material is superposed on the hologram duplication first original plate obtained by causing light to interfere in the photosensitive layer of the hologram photosensitive material,
In the method of producing a hologram color filter by making a laser beam enter from the hologram duplication first original side and duplicating it, an absorptive refractive index matching liquid is provided between the hologram duplication first original plate and the hologram photosensitive material. A method for producing a holographic color filter, characterized in that the hologram color filters are superposed with each other. 6. A method for producing a hologram color filter, characterized in that the method according to any one of claims 1 to 5 is adopted at the same time.