JP2000250019A - Production of liquid crystal optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reflection of incident light or multiple reflection light from entering the precursor of a light-controlling layer in the production process of a liquid crystal optical device. SOLUTION: In the liquid crystal optical device, the precursor 1 of a light-controlling layer 1 is held between two transparent substrates 3 with electrode layers 2 interposed. A transparent substance 13 is disposed as adhered to each light-entering face of the two transparent substrates 3. The precursor 1 of the light-controlling layer contains a precursor of a transparent resin and a liquid crystal material. In this structure, the precursor 1 is irradiated with laser beams 4 through the light-entering faces of the two transparent substances 13 by a two-beam interference method. The precursor 1 of the light-controlling layer forms a multilayered structure of transparent resin layers and liquid crystal material layers by the irradiation of beams to obtain the light-controlling layer 9 consisting of the multilayered structure. In this process, the thickness and form of the transparent substances 13 are determined so that once the reflected light and multiple reflection light 6 on the interfaces such as between transparent substrates 3 and electrode layers 2 enter the transparent substances 13, the light can not exits or be reflected on the light-entering faces and enter again the precursor 1 of the light-controlling layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal optical element used for a display device, a light control device, an optical shutter, and the like. In particular, the present invention relates to a method for manufacturing a liquid crystal optical element that selectively reflects a specific wavelength of incident light.

[0002]

2. Description of the Related Art Conventionally, liquid crystal optical elements have been used in various applications, such as display devices for displaying characters, figures, etc., dimming devices in which the wavelength or amount of reflected light or transmitted light changes, and optical shutters. I have.

This liquid crystal optical element is a holographic polymer-dispersed liquid crystal element (HPD) disclosed in JP-A-4-178623 and the like as a high-brightness reflective display.
LC element). The HPDLC element has a light modulating layer having a multilayer structure in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin are sequentially laminated, and this light modulating layer is formed of a transparent substrate with electrodes. This is an element formed by being sandwiched.

When natural light is incident on the HPDLC element (hereinafter, referred to as a liquid crystal optical element) in a state where no voltage is applied, refraction of the liquid crystal material and the transparent resin in the light control layer is performed. Light of a specific wavelength band determined by the ratio and the layer interval of the multilayer structure is selectively reflected, and light of other wavelength bands is transmitted. Therefore, only light in a specific wavelength band is observed as reflected light from the liquid crystal optical element. On the other hand, by applying a voltage to the liquid crystal optical element, the refractive index difference between the liquid crystal material and the transparent resin is reduced, the reflected light based on selective reflection is weakened, and the element shows a transparent state. .

As described above, the liquid crystal optical element can control the light intensity of the reflected light in a specific wavelength band by the voltage applied thereto, and can selectively reflect natural light incident on the liquid crystal optical element. Since light is used as a light source for display, there is an advantage that a backlight is not required.

FIG. 1 shows a method of manufacturing this type of liquid crystal optical element.
0 will be described. As shown in the figure, the light control layer precursor 1 is sandwiched between two transparent substrates 3 via an electrode layer 2. The light modulating layer precursor 1 includes a precursor of a transparent resin and a liquid crystal material such as a nematic liquid crystal material. This dimming layer precursor 1, two transparent substrates 3 and an electrode layer 2
When the member made of is irradiated with the laser beam 4 by the two-beam interference method, interference fringes 5 are formed on the light control layer precursor 1. In the portion where the light intensity is increased in the interference fringe 5, the precursor of the transparent resin undergoes a polymerization reaction, and the transparent resin is formed in a layer. On the other hand, in the portion where the light intensity is weakened, the liquid crystal material precipitates in a droplet form, and a layer mainly composed of the liquid crystal material is formed.

In this way, as shown in FIG. 2, a light control layer 9 having a multilayer structure in which a layer 7 mainly composed of a liquid crystal material and a layer 8 composed of a transparent resin are sequentially laminated. Thus, a liquid crystal optical element in which the light control layer 9 is sandwiched between two transparent substrates 3 can be obtained.

[0008]

However, in the above-mentioned conventional method for manufacturing a liquid crystal optical element, as shown in FIG. 10, incident light is incident on each interface of the transparent substrate 3, the electrode layer 2, and the light control layer 9. A phenomenon occurs in which the light beam 4 is reflected and multiple-reflected. The reflected and multi-reflected light 6 is finally reflected on the incident surface of the transparent substrate 3 and enters the light control layer precursor 1, causing a polymerization reaction everywhere in the light control layer precursor 1. For this reason, the formed dimming layer 9 has a multilayer structure formed by the incident light 4 and a multiple reflection light 6 by the incident light 4.
And the polymerization structure formed by the above.

When natural light is incident on the light control layer 9 formed as described above, the selective reflection light caused by the multilayer structure and the scattered light and reflected light caused by the polymerized structure are mixed and observed. . For this reason, there are problems such as a decrease in the color purity of the selectively reflected light to be displayed and a decrease in the uniformity of the color of the displayed image.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the disadvantages of the prior art and to prevent the reflection of incident light and the multiple reflection of light from entering the light control layer precursor during the manufacture of a liquid crystal optical element. It is an object of the present invention to provide a method for manufacturing a liquid crystal optical element, which has good color purity of selective reflection light by natural light and high uniformity of color of a display image.

[0011]

In order to achieve the above object, a light modulating layer precursor containing a transparent resin precursor and a liquid crystal material is sandwiched between two transparent substrates via an electrode layer. And
In the method of manufacturing a liquid crystal optical element in which a light control layer is formed by irradiating a plurality of light beams exhibiting coherence to the light control layer precursor via the transparent substrate, A transparent substance was placed in close contact with the incident surface side, and a plurality of light beams exhibiting the coherence were made to enter the light modulating layer precursor via the transparent substance and the transparent substrate. For this reason, in particular, the reflected light at the interface between the transparent substrate and the electrode layer is incident on the transparent substance at least without being reflected on the incident surface of the transparent substrate and incident on the light control layer precursor.

According to a second aspect of the present invention, in the transparent material, reflected lights of the plurality of light beams from respective interfaces of the transparent substrate, the electrode layer, and the light control layer precursor do not enter the light control layer precursor. As described above, since the thickness and the shape are set, the light reflected at the interface between the transparent substrate and the electrode layer and the like and the multiple reflected light are prevented from entering the light control layer precursor.

[0013] Since the transparent substance according to the third aspect is tightly and releasably disposed on the transparent substrate, the transparent substance is promptly released from the transparent substrate after forming the light control layer. A liquid crystal optical element comprising a transparent substrate, the electrode layer, and the light control layer is obtained.

Since the refractive index of the transparent material according to the ninth aspect is the same as the refractive index of the transparent substrate, the light reflected at the interface between the transparent substrate and the electrode layer and the multiple reflected light are converted into the transparent material. Upon incidence, reflection is prevented from entering the dimming layer precursor as if the refractive indices were different.

By adopting the above manufacturing method,
The transparent substance closely attached to the transparent substrate is a plurality of light beams showing the coherence, reflected light and multiple reflected light at the interface,
It has the function of preventing light from entering the light modulating layer precursor.
For this reason, it is completely eliminated or reduced that the reflected light and the multi-reflected light enter the light control layer precursor to form a polymerized structure. Therefore, when natural light is incident on the formed dimming layer, the light is not scattered or reflected by the superposed structure, and is only the selectively reflected light by the multilayer structure, so that the color purity of the selectively reflected light is good. Becomes Further, the uniformity of the light control layer and the displayed image is improved.

[0016]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a method for manufacturing a liquid crystal optical element according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a state where natural light is incident on the liquid crystal optical element. FIG. 3 is a cross-sectional view showing a state in which a voltage is applied to the liquid crystal optical element on which natural light is incident. FIG. 4 is a sectional view showing a method for manufacturing a liquid crystal optical element in which a transparent substance and a transparent substrate are brought into close contact with a liquid substance.
FIG. 4 is a cross-sectional view illustrating a method for manufacturing a liquid crystal optical element in which a transparent substance is arranged so as to surround the liquid crystal optical element. The same members as those in the prior art are given the same numbers.

FIG. 1 shows a method of manufacturing a liquid crystal optical element according to the present invention.
This will be described with reference to FIG. A light modulating layer precursor 1 is sandwiched between two transparent substrates 3 via an electrode layer 2. On the light incident surface side of the two transparent substrates 3, a transparent substance 13 is disposed in close contact with each other in a peelable manner. The light modulating layer precursor 1 includes a precursor of a transparent resin and a liquid crystal material such as a nematic liquid crystal material.

In this configuration, as shown in FIG. 1, a laser beam 4, which is an incident light beam showing coherence, is irradiated from the incident surfaces of two transparent substances 13 by a two-beam interference method. Among the irradiated light rays, the light rays 4 transmitted through the transparent substrate 3 and the electrode layer 2 form interference fringes 5 on the portion of the light control layer precursor 1. As shown in FIGS. 2 and 3, in the portion where the light intensity of the interference fringes 5 is increased, the precursor of the transparent resin undergoes a polymerization reaction to form a layer 7 made of the transparent resin. On the other hand, in the portion where the light intensity is weakened, the liquid crystal material is deposited in a droplet form,
A layer 8 mainly composed of a liquid crystal material is formed. This allows
Layer 8 mainly composed of liquid crystal material and layer 7 composed of transparent resin
The light control layer 9 having a multi-layer structure formed by sequentially laminating the layers can be obtained. In the two-beam interference method, laser light divided into two by a beam splitter (not shown) is crossed at a predetermined position in the light control layer precursor 1, and photopolymerization is performed at a position where the laser light interferes. .

As described above, the dimming layer precursor 1 is changed into the dimming layer 9 by the polymerization reaction when the laser beam 4 is incident by the two-beam interference method, and the dimming layer 9 is converted into the electrode layer 2.
Thus, a liquid crystal optical element (see FIG. 2) sandwiched between two transparent substrates 3 is obtained.

At this time, as shown in FIG. 1, the reflected light and the multi-reflected light 6 generated at the interface between the transparent substrate 3 and the electrode layer 2 and between the transparent electrode 2 and the light modulating layer precursor 1 are transferred to the transparent substrate 3 Instead of being reflected at the interface of the transparent substance 13 and entering the light modulating layer precursor 1, the light enters the transparent substance 13 as it is, and exits from the incident surface. Or reflect in the direction. Therefore, the reflected light and the multiple reflected light 6 generated at the interface hardly enter the light control layer precursor 1. As described above, in order to guide the reflected light and the multiple reflected light 6 to the outside of the light control layer precursor 1, the transparent substance 1
It is necessary to appropriately select the thickness and shape of 3.

The refractive index of the transparent substance 13 is desirably the same as that of the transparent substrate 3. Transparent substance 1
If the difference between the refractive indexes of the transparent substrate 3 and the transparent substrate 3 is large, when the reflected light and the multi-reflected light 6 enter the transparent substance 13, a reflection phenomenon occurs at the interface between the reflected light and the multi-reflected light 6, and the reflected light becomes Incident. The transparent substance 13 having such a refractive index cannot be used for the liquid crystal optical element of the present invention.

As described above, in the manufacturing method of the liquid crystal optical element of the present invention, the laser beam incident on the light control layer precursor 1 does not include the reflected light and the multiple reflected light 6 generated at the interface, and is substantially There is only the incident light beam 4. Therefore, unlike the related art, the polymerization structure formed by the multiple reflection light 6 incident on the light control layer precursor 1 does not exist at all or is reduced, and the light control layer 9 is substantially formed by the above-described multilayer structure ( Laminated structure)
It will be formed only by

When the light control layer 9 is thus formed,
The transparent substance 13 is quickly peeled off from the transparent substrate 3 and removed to obtain a liquid crystal optical element as shown in FIG.

Therefore, as shown in FIG. 1, when natural light 10 is incident on the liquid crystal optical element in a state where no voltage is applied from the power supply 18, the light modulating layer 9 includes a liquid crystal material layer. 8 and the refractive index of the layer 7 made of a transparent resin,
Only the light 11 in a specific wavelength band determined by the layer spacing of the multilayer structure is selectively reflected, and the light in the other wavelength bands becomes the transmitted light 12. As described above, the dimming layer 9 has no (or very few) superimposed structure due to the multiple reflection light 6, so that the selectively reflected light 11 due to the multilayer structure and the scattered light and reflected light due to the superposed structure are not included. Are not (conspicuously) mixed.

Therefore, only the light of a specific wavelength band is observed as the selective reflection light 11 by the liquid crystal optical element, and the selective reflection light 11 has good color purity and uniformity of the color of the displayed image. Can be improved.

On the other hand, as shown in FIG. 3, when a voltage is applied to the liquid crystal optical element by the power supply 18, the difference in the refractive index between the layer 8 made of a liquid crystal material and the layer 7 made of a transparent resin is reduced. Therefore, reflected light 1 based on selective reflection
1 (see FIG. 2) is weakened, most of which becomes the transmitted light 12, and the liquid crystal optical element comes to show a transparent state.
Thus, the light intensity of the reflected light in a specific wavelength band can be controlled by the voltage applied to the liquid crystal optical element.

As shown in this embodiment, a laser beam in the visible region is used as a light source used for polymerization of the transparent resin precursor of the light control layer precursor 1.

The wavelength of the selectively reflected light 11 (see FIG. 2) resulting from the multilayer structure of the obtained light control layer 9 is the wavelength of the laser light used for manufacturing the light control layer 9, the intersection angle of the two laser lights, And the angle of incidence of the laser beam on the transparent substrate 3,
Can be changed as appropriate by adjusting. Further, if necessary, a light shielding film such as a photomask may be used.

In this embodiment, the transparent material 13 is used.
Is bonded to the incident surface side of the transparent substrate 3, but it is also possible to adopt a configuration in which the transparent substance 13 is brought into close contact with the transparent substrate 3 via the liquid substance 17 as shown in FIG.

In this embodiment, the transparent material 13 is used.
Is bonded to the incident surface side of the transparent substrate 3, but may be a form surrounding the entire liquid crystal optical element as shown in FIG. 5, for example, other than this form. With this configuration, the same operation and effect as those of the above embodiment can be expected.

Next, materials used for each member used in the method of manufacturing a liquid crystal optical element of this embodiment will be described.

The precursor of the transparent resin of the light control layer precursor 1 is
A monomer or oligomer polymerized by light irradiation, a mixture of a monomer and an oligomer, or the like can be used. That is, any precursor compound having a usual photopolymerizable group such as an acryloyl group, a methacryloyl group, and a vinyl group can be used. A plurality of photopolymerizable groups may be present in one molecule of the precursor compound.

As the monomer, for example, 2-ethylhexyl acrylate, butylethyl acrylate, butoxyethyl acrylate, 2-cyanoethyl acrylate, benzyl acrylate, cyclohexyl acrylate, 2-hydroxypropyl acrylate, 2-ethoxyethyl acrylate, N, N-diethylamino Ethyl acrylate, N, N-dimethylaminoethyl acrylate, dicyclopentanyl acrylate, dicyclopentenyl acrylate, glycidyl acrylate, tetrahydrofurfuryl acrylate, isobonyl acrylate, isodecyl acrylate, lauryl acrylate,
Morpholine acrylate, phenoxyethyl acrylate, monofunctional acrylate compounds such as phenoxydiethylene glycol acrylate, 2-ethylhexyl methacrylate, butylethyl methacrylate, butoxyethyl methacrylate, 2-cyanoethyl methacrylate,
Benzyl methacrylate, cyclohexyl methacrylate, 2-hydroxypropyl methacrylate, 2-ethoxyethyl acrylate, N, N-diethylaminoethyl methacrylate, N, N-dimethylaminoethyl methacrylate, dicyclopentanyl methacrylate, dicyclopentenyl methacrylate, glycidyl methacrylate, tetrahydro Monofunctional methacrylate compounds such as furfuryl methacrylate, isobonyl methacrylate, isodecyl methacrylate, lauryl methacrylate, morpholine methacrylate, phenoxyethyl methacrylate, phenoxydiethylene glycol methacrylate, diethylene glycol diacrylate, 1,4-butanediol diacrylate, 1,3-butylene Glycol glycol , Dicyclopentanyl diacrylate, glycerol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, tetraethylene glycol diacrylate,
Polyfunctional acrylate compounds such as trimethylolpropane triacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, ditrimethylolpropane tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol monohydroxypentaacrylate, urethane acrylate oligomer, diethylene glycol dimethacrylate , 1,4-butanediol dimethacrylate,
1,3-butylene glycol dimethacrylate, dicyclopentanyl dimethacrylate glycerol dimethacrylate, 1,6-hexanediol dimethacrylate,
Neopentyl glycol dimethacrylate, tetraethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetramethacrylate, pentaerythritol trimethacrylate, ditrimethylolpropane tetramethacrylate, dipentaerythritol hexamethacrylate, dipentaerythritol monohydroxypentamethacrylate, urethane methacrylate There are polyfunctional methacrylate compounds such as oligomers. However, it is not limited to these.

The precursor compound of the transparent resin includes a photopolymerization initiator for initiating polymerization by light irradiation, a photopolymerization initiation aid for supplying protons and the like to the photopolymerization initiator, and a photopolymerization initiator by absorbing light. A dye sensitizer that transfers the generated excitation energy to the photopolymerization initiator can be added. However, when the photopolymerization initiator alone initiates polymerization by light irradiation, it is not always necessary to add another material.

As the photopolymerization initiator, acetophenone-based, benzoin-based, benzophenone-based and thioxanthone-based ones can be used. For example, diethoxyacetophenone, dimethoxyacetophenone, benzoin methyl ether, benzoin ethyl ether, 4-phenylbenzophenone, 2-chlorothioxanthone,
-Methylthioxanthone and the like. The photopolymerization initiator may be a solid or a liquid, but is desirably dissolved or compatible with a mixture of a liquid crystal material and a precursor of a transparent resin at room temperature in view of the uniformity of the device. The addition amount of the photopolymerization initiator is desirably 30% by weight or less of the precursor of the transparent resin.

Examples of photopolymerization initiation aids include general methyldiethanolamine, 4-dimethylaminobenzoic acid,
Etc. can be used.

Examples of the dye sensitizer include coumarin dyes, rhodamine dyes, oxazine dyes, carbocyanine dyes, styryl dyes, xanthene dyes, merocyanine dyes, rhodocyanine dyes, porphyrin dyes, and acridine dyes. Examples include, but are not limited to, dyes. Any dye sensitizer may be used as long as it is excited by light irradiation and transfers energy to the photopolymerization initiator.

The liquid crystal material contained in the light control layer precursor 1 is particularly preferably a nematic liquid crystal material. Nematic liquid crystal materials include cyano, fluorine, chlorine,
Any liquid crystal material can be used, but in order to perform active driving with an active element such as a thin film transistor (TFT), a fluorine-based liquid crystal material having a high charge retention rate is desirable.

The liquid crystal material preferably has a positive dielectric anisotropy, but a dual-frequency driven liquid crystal material having both positive and negative values depending on the applied frequency, or a material having a negative dielectric anisotropy. But it doesn't matter.

The content ratio of the liquid crystal material in the light control layer precursor 1 is preferably 20% by weight or more and 80% by weight or less, more preferably 30% by weight or more and 50% by weight or less. If it is larger than this range, it is difficult to form a multilayer structure (laminated structure) composed of a liquid crystal material and a transparent resin,
The light intensity of the selectively reflected light due to this multilayer structure becomes weak. If it is less than the above range, the driving voltage applied to the electrode layer 2 must be increased.

As a material for the transparent substrate 3, an inorganic material such as glass or quartz, an organic material such as plastic, or the like can be used. Further, a composite material of an inorganic material and an organic material may be used. Each of the inorganic material and the organic material may be composed of a single component, or may be composed of a plurality of components as required. Moreover, it is desirable that it is optically isotropic. If it is optically anisotropic, the polarization plane of the incident light changes, so that light interference hardly occurs.

As a material for the electrode layer 2, indium-tin-oxide (ITO) or a conductive polymer material can be used. The electrode layer 2 is desirably transparent. The electrode for applying a voltage to each electrode layer 2 does not need to be transparent, and any conductive material such as a metal material and a conductive polymer material may be used. When each dimming layer is driven by an active element such as a thin film transistor, one electrode layer 2 may be connected to the counter electrode and the remaining electrode layers 2 may be connected to each active element.

Materials which can be used for the transparent substance 13 of the present invention include glass, quartz, calcium fluoride, barium fluoride, and sodium chloride which are solid at ordinary temperature if the refractive index is 1.0 to 2.0. And inorganic materials such as potassium bromide,
Examples include organic materials such as MMA and plastic, and water, oil, and organic solvents that are liquid at room temperature. These inorganic and organic materials, and the liquid may each be composed of a single component, or may be composed of a plurality of components as necessary, and if necessary. Further, they may be mixed.

It is desirable that the transparent substance 13 is optically isotropic. If it is optically anisotropic, the polarization plane of the incident light changes, so that light interference hardly occurs.
However, even if a material exhibiting anisotropy is used, the method is not limited to this, provided that the method of disposing the transparent substance 13 and the material are selected so that light interference occurs at a predetermined portion of the light control layer precursor 1.

The liquid substance 17 used to adhere the transparent substrate 3 to the transparent substance 13 is not particularly limited as long as the substance has a refractive index of 1.0 to 2.0. For example, benzene, toluene, xylene A variety of substances can be used, such as aromatic compounds such as, organic compounds such as chain compounds such as alcohols and fatty acids, and water.

Note that the refractive index of the liquid substance 17 is
It is desirable that the refractive index of the transparent material 13 be close to the value of the refractive index. The boiling point of the transparent substance 13 is desirably equal to or higher than room temperature, and preferably equal to or higher than 50 degrees. Liquid substances having a boiling point of room temperature or lower or near room temperature are not suitable for use because the transparent substrate 3 and the transparent substance 13 may be vaporized by heat or the like generated by irradiation with laser light and peel off.

Next, another embodiment will be described.
The following three other embodiments are substantially the same as the embodiment of FIG. 1, and the same members are denoted by the same reference numerals, and description of those portions will be omitted.

First, a second embodiment shown in FIG. 6 will be described. This embodiment is different from the embodiment of FIG. 1 in that a light absorber 14
(Shown by oblique lines).

In this configuration, when the laser beam 4 enters from the transparent substance 13, the reflected light and the multi-reflected light 6 generated at the interface between the transparent substrate 3, the transparent electrode 2 and the light modulating layer precursor 1, Since the light is absorbed by the light absorber 14, the reflected light 6 can be prevented from entering the light control layer precursor 1.

The light absorber 14 is not particularly limited as long as it is a material that absorbs the wavelength of incident light. For example, various inorganic materials such as cloths such as felt cloth, coating materials such as dyes and paints, and the like can be used. , And organic materials can be used. The light absorption intensity or the absorption wavelength can be arbitrarily changed according to the target production conditions.

The light absorber 14 is, as in this embodiment,
It may be provided on the surface on the light incident surface side except the light incident portion of the transparent substance 13 or may be formed in the transparent substance 13 substance. The light absorber 14 may be disposed directly on the transparent substance 13, or the transparent substance 13 and the light absorber 14 may be bonded via an adhesive layer.

Next, a third embodiment shown in FIG. 7 will be described. This embodiment differs from the embodiment of FIG. 1 in that a light scatterer 15 is provided on the incident surface side of the transparent substance 13.

In this configuration, the reflected light and the multiple reflected light 6 generated at the interface between the transparent substrate 3, the transparent electrode 2, and the light modulating layer precursor 1 due to the incidence of the laser light 4 from the transparent substance 13, Because it is scattered by the light scatterer 15,
The reflected light 6 can be prevented from entering the light control layer precursor 1.

The light scatterer 15 is not particularly limited as long as it scatters incident and reflected light. For example, various inorganic and organic materials such as ground glass, glass fine particles, and plastic fine particles may be used. Can be. The light scattering intensity can be arbitrarily changed according to the desired manufacturing conditions.

The light scatterer 15 may be provided on the surface on the light incident surface side of the transparent material 13 except for the light incident portion, or may be formed in the transparent material 13. Light scatterer 15
May be disposed directly on the transparent substance 13 or the transparent substance 13 and the light scatterer 15 may be bonded via an adhesive layer.

Next, a fourth embodiment shown in FIG. 8 will be described. This embodiment differs from the embodiment of FIG. 1 in that an optical diffracting body 16 is provided on the incident surface side of the transparent substance 13.

In this configuration, the reflected light and the multiple reflected light 6 generated at the interface between the transparent substrate 3, the transparent electrode 2, and the light modulating layer precursor 1 due to the incidence of the laser light 4 from the transparent substance 13, Since it is diffracted by the light diffracting body 16,
The reflected light 6 can be prevented from entering the light control layer precursor 1.

The light diffracting body 16 is not particularly limited as long as it diffracts the incident light 4 and the reflected light 6. For example, a diffraction grating made of glass with minute grooves, an organic material or an inorganic material may be used. Can be. The light diffraction intensity can be arbitrarily changed in accordance with the desired manufacturing conditions.

The light diffracting body 16 may be provided on the surface on the light incident surface side of the transparent substance 13 except for the light incident part, or may be formed in the transparent substance 13. Light diffracting body 16
May be disposed directly on the transparent substance 13 or the transparent substance 13 and the light diffracting body 16 may be bonded via an adhesive layer.

Hereinafter, specific numerical examples of the present invention will be described with reference to the drawings.

Example 1 Luxtrack LCR208 (manufactured by Toa Gosei Chemical Co., Ltd.) was used as a precursor of a transparent resin.
A light modulating layer precursor 1 containing 5% by weight and 35% by weight of BL036 (manufactured by MERCK) as a liquid crystal material was prepared. The light modulating layer precursor 1 was sandwiched at a distance of 5 μm between two transparent substrates 3 each having an electrode layer 2 having an area of 1 cm ^{2 and made} of a polysilicate material having a thickness of 1.1 mm. Next, as the transparent substance 13, a 1-cm thick polysilicate plate made of the same material as that of the transparent substrate 3 was used.
, Respectively. Thereafter, argon laser light having a wavelength of 488 nm, which was made into two light beams by a beam splitter, was incident on the transparent substance 13 from above and below, respectively, as the incident light 4, and crossed at a predetermined position in the light control layer precursor 1. Thereafter, irradiation with a high-pressure mercury lamp was performed to terminate the polymerization reaction. The transparent substance 13 was removed from the transparent substrate 3 to obtain a liquid crystal optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the liquid crystal optical element thus obtained, as shown in FIG. 2, when white light 10 is incident without applying a voltage, selective reflection light 11 with a high color purity near a wavelength of 535 nm is obtained. Was. The light intensity of the selective reflection light 11 is
The light control layer was uniform on the entire 9 surfaces. As shown in FIG.
When an AC rectangular wave of 100 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 535 nm decreased.

Comparative Example 1 A liquid crystal optical element was produced under the same conditions as in Example 1 except that the transparent substance 13 was not used. In the liquid crystal optical element obtained here, the light transmittance on the short wavelength side decreased when no voltage was applied. Further, the color purity of the light selectively reflected was low, and the element was slightly white. The light control layer surface of the light control layer precursor 1 was uneven, and the light intensity of the selective reflection was non-uniform.

FIG. 9 shows the correlation between the wavelength of the incident light 4 and the selectively reflected light of the liquid layer optical element according to (Example 1) and (Comparative Example 1). In the figure, the solid line indicates the characteristic line of (Example 1) and the broken line indicates the characteristic line of (Comparative Example 1). Both characteristic lines show the light transmittance when the wavelength (nm) of the incident light 4 is around 530. (%) Sharply decreases, indicating that selective reflection occurs at this wavelength (nm). In particular, the solid line indicates that the characteristic line of the liquid layer optical element according to (Example 1) has a sharper peak indicating selective reflection than the characteristic line of (Comparative Example 1), and has a visible wavelength range other than the selectively reflected light. The transmittance (%) is substantially constant. Therefore, it can be seen that the selective reflection light by the liquid layer optical element of (Example 1) of the present invention has extremely good color purity.

Example 2 70% by weight of Luxtrack LCR208 (manufactured by Toa Gosei Chemical Co., Ltd.) as a precursor compound of a transparent resin, and PN001 (ROD) as a liquid crystal material
A light modulating layer precursor 1 containing 30% by weight (IC company) was prepared. The light modulating layer precursor 1 was sandwiched at a substrate interval of 5 μm using two transparent substrates 3 each having an electrode layer 2 having an area of 25 mm ² and made of quartz glass having a thickness of 0.7 mm. Next, a calcium fluoride plate having a thickness of 0.5 cm as the transparent substance 10 was closely attached to the two transparent substrates 3. After that, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the liquid crystal optical element thus obtained, as shown in FIG. 2, when white light 10 is incident without applying a voltage, selective reflection light 11 having a high color purity near a wavelength of 538 nm is obtained. Was. Further, as shown in FIG. 3, when an AC rectangular wave of 90 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 538 nm decreased.

Example 3 Luxtrack LCR208 (manufactured by Toa Gosei Chemical Co., Ltd.) was used as a precursor of a transparent resin.
A light modulating layer precursor 1 containing 6% by weight and 34% by weight of BL001 (manufactured by MERCK) as a liquid crystal material was prepared. This light modulating layer precursor 1 was formed on a transparent substrate 3 made of quartz glass having an electrode layer 2 having an area of 1 cm ² and a thickness of 0.7 mm.
Were sandwiched at a substrate interval of 5 μm. Next, a polymethyl methacrylate plate having a thickness of 5 mm as the transparent substance 13 was closely attached to the two transparent substrates 3. afterwards,
The same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity near a wavelength of 540 nm was obtained. . Further, as shown in FIG. 3, when an AC rectangular wave of 85 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 540 nm decreased.

Example 4 As a precursor of a transparent resin,
68% by weight of light acrylate 1.6HX-A (manufactured by Kyoeisha Chemical Co., Ltd.), 1% by weight of camphorquinone (manufactured by Tokyo Chemical Industry) as a photopolymerization initiator, and DMBI (manufactured by Nippon Kayaku Co., Ltd.) 1% by weight), and BL0 was added to this precursor as a liquid crystal material.
36 (manufactured by MERCK) was contained in an amount of 30% by weight to prepare the light control layer precursor 1. This light modulating layer precursor 1 was treated with an area 1c
^Two transparent substrates 3 made of a polysilicate material having a thickness of 1.1 mm and having an electrode layer 2 of
It was pinched. Next, as the transparent substance 13, a 1-cm thick polysilicate plate made of the same material as the transparent substrate 3 was used.
The two transparent substrates 3 were closely attached to each other. Then, the light absorber 1
As No. 4, a black felt cloth was arranged as shown in FIG. After that, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the liquid crystal optical element thus obtained, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity at a wavelength of about 530 nm was obtained. . As shown in FIG. 3, when an AC rectangular wave of 100 V and 110 V was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 530 nm decreased.

Example 5 N was used as a precursor of a transparent resin.
ORLAND NOA65 (NORLAND PROD
UCTS INC. 69.5% by weight) and Coumarin 6 (manufactured by KODAK) as a dye sensitizer was 0.5% by weight.
The light control layer precursor 1 was prepared by adding 30% by weight of BL036 (manufactured by MERCK) as a liquid crystal material to this precursor. This light control layer precursor 1
Was sandwiched at an interval of 6 μm using two transparent substrates 3 each having an electrode layer 2 having an area of 1 cm ² and made of a polysilicate material having a thickness of 1.1 mm. Next, as the transparent substance 13, a 1-cm thick polysilicate plate made of the same material as the transparent substrate 3 was placed in close contact with the two transparent substrates 3. Then, as a light absorber 14 on the light incident surface of the transparent substance 13,
The black felt cloth was arranged as shown in FIG. After that, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity near the wavelength of 532 nm was obtained. . Further, as shown in FIG. 3, when an AC rectangular wave of 85 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 532 nm decreased.

Example 6 As a precursor of a transparent resin,
65% by weight of LUXTRACK LCR208 (manufactured by Toa Gosei Chemical Co., Ltd.) and BL036 (MERCK) as a liquid crystal material
The light control layer precursor 1 containing 35% by weight of the light control layer was prepared. This light modulating layer precursor 1 was sandwiched at a substrate interval of 6 μm using two transparent substrates 3 each having an electrode layer 2 having an area of 1 cm ^{2 and made} of a polysilicate material having a thickness of 1.1 mm. Next, as the transparent substance 13, a 1-cm thick polysilicate plate made of the same material as that of the transparent substrate 3 was used.
, Respectively. Then, as shown in FIG.
Ground glass was attached to the transparent material 13 as the light scatterer 15. After that, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity near a wavelength of 530 nm was obtained. . The light intensity of the selective reflection is controlled by the light control layer 9.
It was uniform over the entire surface. As shown in FIG. 3, when an AC rectangular wave of 100 V and 120 V was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 530 nm decreased.

Example 7 As a precursor of a transparent resin,
68% by weight of light acrylate DCP-A (manufactured by Kyoeisha Chemical Co., Ltd.), 1% by weight of camphorquinone (manufactured by Tokyo Kasei) as a photopolymerization initiator, and DMBI (manufactured by Nippon Kayaku Co., Ltd.) as a photopolymerization initiation aid Is used, and TL-21 is used as a liquid crystal material in this precursor.
3 (manufactured by MERCK) was contained in an amount of 30% by weight to prepare a light control layer precursor 1. This light modulating layer precursor 1 was coated with an area of 25 m.
^Two transparent substrates 3 each having an electrode layer 2 of m ² and made of soda glass having a thickness of 1.1 mm were used and sandwiched at a substrate interval of 6 μm. Next, as the transparent substance 13, a 1 cm thick soda glass plate made of the same material as the transparent substrate 3 was placed in close contact with the two transparent substrates 3. Then, as shown in FIG.
Ground glass as the light scatterer 15 was disposed on the transparent substance 13. After that, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity near a wavelength of 525 nm was obtained. . As shown in FIG. 3, when an AC rectangular wave of 115 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 525 nm decreased.

Example 8 As a precursor of a transparent resin,
67% by weight of light acrylate 1.6HX-A (manufactured by Kyoeisha Chemical Co., Ltd.), and CGI784 as a photopolymerization initiator
(Ciba Specialty Chemicals Co., Ltd.) containing 3% by weight of a precursor obtained as a liquid crystal material, BL036 (M
ERCK) (30% by weight), and a light control layer precursor 1
Was prepared. The light modulating layer precursor 1 was sandwiched at a spacing of 6 μm using two transparent substrates 3 each having an electrode layer 2 having an area of 1 cm ² and made of a polysilicate material having a thickness of 1.1 mm. Next, as the transparent substance 13, a 1-cm thick polysilicate plate made of the same material as the transparent substrate 3 was placed in close contact with the two transparent substrates 3. Then, as shown in FIG.
A black felt cloth is used as the light absorber 14 and the transparent substance 13 is used.
Was placed. Thereafter, the same treatment as in Example 1 is performed.
A liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated was obtained.

In the liquid crystal optical element thus obtained, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflected light 11 having a high color purity near a wavelength of 560 nm was obtained. . Further, as shown in FIG. 3, when an AC rectangular wave of 100 V and 115 V was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 560 nm decreased.

Example 9 As a precursor of a transparent resin,
67% by weight of light acrylate DCP-A (manufactured by Kyoeisha Chemical Co., Ltd.) and CGI784 as a photopolymerization initiator.
(Ciba Specialty Chemicals) 3% by weight. RDP-409 was used as a liquid crystal material in this precursor.
57 (manufactured by RODIC) was contained in an amount of 30% by weight, and the light control layer precursor 1 was prepared. Thereafter, the same treatment as in Example 8 was performed to obtain a liquid layer optical element in which a light control layer was mainly formed of a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity and near wavelength 555 nm was obtained. . Further, as shown in FIG. 3, when an AC rectangular wave of 100 V and 130 V was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 555 nm decreased.

(Example 10) Light acrylate TMP-A (manufactured by Kyoeisha Chemical Co., Ltd.) was 68% by weight as a precursor of a transparent resin, and camphorquinone (manufactured by Tokyo Chemical Industry) was 1% by weight as a photopolymerization initiator. A photopolymerization initiation aid containing 1% by weight of DMBI (manufactured by Nippon Kayaku Co., Ltd.) was used.
36 (manufactured by MERCK) was contained in an amount of 30% by weight to prepare the light control layer precursor 1. This light modulating layer precursor 1 was treated with an area 1c
^Two transparent substrates 3 each having an electrode layer 2 of m ² and made of soda glass having a thickness of 0.7 mm were used, and were sandwiched at a substrate interval of 6 μm. Next, a 1 cm thick soda glass plate made of the same material as the transparent substrate 3 as the transparent substance 13 was placed in close contact with the two transparent substrates 3. Thereafter, the transparent substance 13 and the transparent substrate 3 were brought into close contact with each other via toluene (Aldrich: refractive index: 1.496). Thereafter, the same treatment as in Example 1 was performed to obtain a liquid layer optical element having a light control layer in which a layer mainly composed of a liquid crystal material and a layer composed of a transparent resin were sequentially laminated.

In the liquid crystal optical element thus obtained, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity near a wavelength of 526 nm was obtained. . As shown in FIG. 3, when an AC rectangular wave of 100 V and 120 V was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 526 nm decreased.

Example 11 73% by weight of light acrylate PE-4A (manufactured by Kyoeisha Chemical Co., Ltd.) as a precursor of a transparent resin, and 1% by weight of camphorquinone (manufactured by Tokyo Chemical Industry) as a photopolymerization initiator A material containing 1% by weight of DMBI (manufactured by Nippon Kayaku Co., Ltd.) was used as a photopolymerization initiation aid.
36 (manufactured by MERCK) was contained in an amount of 25% by weight, and the light control layer precursor 1 was prepared. This light modulating layer precursor 1 was treated with an area 1c
^Two transparent substrates 3 each having an electrode layer 2 of m ² and made of soda glass having a thickness of 0.7 mm were used, and were sandwiched at a substrate interval of 6 μm. Next, a 1 cm thick soda glass plate made of the same material as the transparent substrate 3 as the transparent substance 13 was placed in close contact with the two transparent substrates 3. At this time, the transparent substance 13 and the transparent substrate 3 are made of xylene (Aldrich: refractive index 1.
495). Thereafter, as shown in FIG. 6, a black felt cloth was placed on the transparent material 13 as the light absorber 14. Thereafter, the same treatment as in Example 1 was performed to obtain a liquid layer optical element in which a light control layer was mainly formed of a liquid crystal material and a layer formed of a transparent resin in that order.

In the thus obtained liquid crystal optical element, as shown in FIG. 2, when white light 10 was incident without applying a voltage, selective reflection light 11 having a high color purity and a wavelength around 524 nm was obtained. . Further, as shown in FIG. 3, when an AC rectangular wave of 110 V at 100 Hz was applied to the liquid crystal optical element, the reflectance of light near a wavelength of 524 nm decreased. still,
The present invention is not limited to only the above embodiments and numerical examples, and each embodiment can be appropriately changed within the scope of the technical idea of the present invention.

[0086]

As described above, according to the present invention,
A light modulating layer precursor including a transparent resin precursor and a liquid crystal material is sandwiched between two transparent substrates via an electrode layer, and a plurality of light beams exhibiting coherence are modulated through the transparent substrate. When the light is to be incident on the optical layer precursor, a transparent substance is disposed in close contact with the light incident surface side of the two transparent substrates, and the coherence is reduced through the transparent substance and the transparent substrate. Are incident on the light modulating layer precursor, and in particular, light reflected at the interface between the transparent substrate and the electrode layer is at least reflected on the incident surface of the transparent substrate and reflected by the light modulating layer precursor. The light can be incident on the transparent substance without being incident on the body.

Further, the transparent substance is adjusted so that the reflected lights of the plurality of light beams from the respective interfaces of the transparent substrate, the electrode layer, and the light modulating layer precursor do not enter the light modulating layer precursor. By setting the thickness and the shape, it is possible to prevent reflected light and multiple reflected light at the interface between the transparent substrate and the electrode layer from entering the light modulating layer precursor as much as possible. For this reason, the polymerization structure formed in the light control layer precursor by reflection of incident light and multiple reflection can be completely eliminated or reduced.

Therefore, when natural light is incident on the obtained light control layer, the light is not scattered or reflected by the mixed polymerization structure as in the conventional case, and only the selectively reflected light by the multilayer structure is observed. Therefore, the color purity of the selectively reflected light can be improved. By pulling, the uniformity of the dimming layer can be improved, and the color of the displayed image can also be made uniform to improve the image quality.

Further, since the transparent substance is disposed in close contact with the transparent substrate in a releasable manner, the transparent substance is promptly peeled off from the transparent substrate after forming the dimming layer.
The liquid crystal optical element can be prevented from increasing in size.

Further, by making the refractive index of the transparent substance equal to that of the transparent substrate, the reflected light and the multiple reflected light at the interface between the transparent substrate and the electrode layer can be reflected when entering the transparent substance. And the reflected light can be reliably prevented from entering the light control layer precursor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a method for manufacturing a liquid crystal optical element according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where natural light is incident on the liquid crystal optical element.

FIG. 3 is a cross-sectional view showing a state in which a voltage is applied to a liquid crystal optical element on which natural light is incident.

FIG. 4 is a cross-sectional view illustrating a method for manufacturing a liquid crystal optical element in which a transparent substance and a transparent substrate are brought into close contact with a liquid substance.

FIG. 5 is a cross-sectional view illustrating a method of manufacturing a liquid crystal optical element in which a transparent substance is arranged so as to surround the liquid crystal optical element.

FIG. 6 is a sectional view showing a second embodiment in which a light absorber is disposed on a transparent material.

FIG. 7 is a sectional view showing a third embodiment in which a light scatterer is disposed on a transparent material.

FIG. 8 is a cross-sectional view illustrating a fourth embodiment in which an optical diffraction body is disposed on a transparent material.

FIG. 9 is a characteristic diagram showing a correlation between the wavelength of light incident on the liquid crystal optical element and the transmittance.

FIG. 10 is a cross-sectional view illustrating a method for manufacturing a conventional liquid crystal optical element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dimming layer precursor 2 Electrode layer 3 Transparent substrate 4 Laser beam 5 Interference fringe 6 Reflected light and multiple reflected light 9 Dimming layer 10 Natural light 11 Selectively reflected light 12 Transmitted light 13 Transparent substance 14 Light absorber 15 Light scatterer 16 light diffractor 17 liquid substance

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideya Murai 5-7-1 Shiba, Minato-ku, Tokyo F-term in NEC Corporation 2H089 HA04 KA04 QA16

Claims (13)

[Claims] 1. A light modulating layer precursor containing a transparent resin precursor and a liquid crystal material is sandwiched between two transparent substrates via an electrode layer, and interference is reduced through the transparent substrate. In the method for manufacturing a liquid crystal optical element in which a light control layer is formed by causing a plurality of light beams to be incident on the light control layer precursor, a transparent substance is adhered to the light incident surface side of the two transparent substrates. A method for manufacturing a liquid crystal optical element, comprising: arranging a plurality of light beams exhibiting the coherence to the light modulating layer precursor via the transparent substance and the transparent substrate. 2. The method according to claim 1, wherein the transparent material includes:
The thickness and shape of the transparent substrate, the electrode layer, and the light control layer precursor are set so that reflected light from each interface of the light control layer precursor does not enter the light control layer precursor. 2. A method for manufacturing the liquid crystal optical element according to 1. 3. The method for manufacturing a liquid crystal optical element according to claim 1, wherein the transparent substance is removably adhered to the transparent substrate. 4. The method according to claim 1, wherein the plurality of light beams exhibiting the coherence are laser light having a visible wavelength. 5. The method for manufacturing a liquid crystal optical element according to claim 1, wherein the transparent substance is closely attached to the transparent substrate via a liquid substance. 6. The liquid substance has a refractive index of 1.0 to 1.0.
6. The method for manufacturing a liquid crystal optical element according to claim 5, wherein the value is 2.0. 7. The method for producing a liquid crystal optical element according to claim 1, wherein the transparent substance is optically isotropic. 8. The transparent material has a refractive index of 1.0.
Claims 1, 2, 3,
8. The method for producing a liquid crystal optical element according to 4, 5, 6, or 7. 9. The method according to claim 1, wherein a refractive index of the transparent material is the same as a refractive index of the transparent substrate. 10. The method according to claim 1, wherein the transparent substance is solid or liquid at room temperature.
10. The method for producing a liquid crystal optical element according to 5, 7, 8, or 9. 11. A method for absorbing reflected light from respective interfaces of the transparent substrate, the electrode layer, and the light modulating layer precursor at a predetermined position on the incident surface of the transparent substance other than the incident portion of the light beam. The light absorber of Claim 1 provided.
The method for producing a liquid crystal optical element according to 2, 3, 4, 5, 6, 7, 8, 9, or 10. 12. In order to scatter reflected light from respective interfaces of the transparent substrate, the electrode layer, and the light modulating layer precursor at a predetermined position on the incident surface of the transparent substance other than the incident portion of the light beam. The light scatterer according to claim 1, wherein
The method for producing a liquid crystal optical element according to 2, 3, 4, 5, 6, 7, 8, 9, or 10. 13. A device for diffracting reflected light from respective interfaces of the transparent substrate, the electrode layer, and the light modulating layer precursor at a predetermined position on an incident surface of the transparent substance other than an incident portion of the light beam. The light diffracting body of Claim 1 provided.
The method for producing a liquid crystal optical element according to 2, 3, 4, 5, 6, 7, 8, 9, or 10.