CN118409457A - Optically addressed liquid crystal light valve and preparation method thereof - Google Patents
Optically addressed liquid crystal light valve and preparation method thereof Download PDFInfo
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- CN118409457A CN118409457A CN202410873602.1A CN202410873602A CN118409457A CN 118409457 A CN118409457 A CN 118409457A CN 202410873602 A CN202410873602 A CN 202410873602A CN 118409457 A CN118409457 A CN 118409457A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses an optically addressed liquid crystal light valve and a preparation method thereof, relating to the technical field of liquid crystal modulation equipment, comprising the following steps: the light valve assembly comprises an optoelectronic substrate positioned on the outer side surface and a first liquid crystal layer positioned inside; the light valve component is positioned on one surface of the first transparent substrate far away from the second liquid crystal layer; the second liquid crystal layer is used for correcting the polarization state of polarized light which sequentially passes through the photoelectric substrate and the first liquid crystal layer. By adopting the scheme, the laser which is originally subjected to the light addressing light valve and generates the polarization state change is corrected back to the correct polarization state through the light beam phase information regulation function of the wave plate component, so that the problems of laser phase and polarization caused by the optical rotation effect and the double refraction effect of the material are solved.
Description
Technical Field
The invention relates to the technical field of liquid crystal modulation equipment, in particular to an optically addressed liquid crystal light valve and a preparation method thereof.
Background
An optically addressed liquid crystal light valve is an optically addressed liquid crystal spatial light modulator made by associating a liquid crystal material with an electro-optic material. The light addressing liquid crystal light valve mainly comprises a liquid crystal material, a photoelectric substrate, a transparent conductive film, a liquid crystal orientation layer and a transparent substrate, and the modulation of the liquid crystal on the incident laser phase information is realized through the combined action of addressing light and driving voltage. The basic principle is that addressing light enters the photoelectric substrate to cause the conductivity of the irradiated part to be greatly increased, and the voltage applied to the surface of the photoconductive substrate acts on the liquid crystal layer through the inside of the substrate to realize the voltage regulation and control of the liquid crystal at the corresponding position of the irradiated part, so that the modulation of main laser is completed through the electric control birefringence effect of the liquid crystal.
In fact, in the field of novel laser processing manufacturing based on liquid crystal modulators, the electro-optical substrate of the optically addressed liquid crystal light valve is mostly a crystal material such as Bismuth Silicate (BSO), and the optical rotation effect and the birefringence effect of the material itself cause the following problems in the application process of the optically addressed light valve:
In the field of novel laser processing manufacturing based on liquid crystal modulators, the implementation of pattern "one shot" with optically addressed liquid crystal light valves should satisfy: 1. under the condition that no voltage and addressing light are applied to the light addressing liquid crystal light valve, the laser light passes through the light addressing liquid crystal light valve and passes through a polarizer or a polarization splitting prism, almost all energy is emitted from the same direction (such as a transmission direction), and the energy in the other direction (such as a reflection direction) is lower than 1% of the total energy; 2. after the light addressing liquid crystal light valve voltage and the addressing light pattern are given, the required pattern is not emitted from the original direction (such as the transmission direction) but emitted from the direction (such as the reflection direction) with lower energy after passing through a polarizer or a polarization splitting prism. Meeting the two conditions can ensure that the required laser pattern reaches the target surface, ablate to form a pattern consistent with the addressing light pattern, and avoid that the non-pattern area is ablated due to the existence of stronger laser. However, the optical rotation effect, the birefringence effect and the birefringence effect of the optical addressing liquid crystal light valve photoelectric substrate lead to that laser does not keep a horizontal polarization state or a vertical polarization state, and after passing through a polarizer or a polarization beam splitter prism, stronger laser exists in the transmission direction and the reflection direction of the polarizer or the polarization beam splitter prism, so that most of energy cannot be emitted from the same direction, and the problem that after the patterned addressing light is applied, a non-target area is ablated or the ablation forming precision is reduced, and the forming effect of a processing and manufacturing surface is greatly influenced is possibly caused.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide an optical addressing liquid crystal light valve and a preparation method thereof.
The invention is realized by the following technical scheme:
An optically addressed liquid crystal light valve comprising:
The light valve assembly comprises an optoelectronic substrate positioned on the outer side surface and a first liquid crystal layer positioned inside;
The light valve component is positioned on one surface of the first transparent substrate far away from the second liquid crystal layer;
The second liquid crystal layer is used for correcting the polarization state of polarized light which sequentially passes through the photoelectric substrate and the first liquid crystal layer.
Compared with the optical rotation effect and the double refraction effect of the light addressing liquid crystal light valve material in the prior art, the laser is not kept in a horizontal polarization state or a vertical polarization state, and after passing through the polarizer or the polarization beam splitter prism, stronger laser exists in the transmission direction and the reflection direction of the polarizer or the polarization beam splitter prism, so that most of energy cannot be emitted from the same direction, and the problem that the non-target area is ablated or the ablation forming precision is reduced after the patterned addressing light is applied, and the forming effect of a processing and manufacturing surface is greatly influenced is possibly caused. The invention provides an optical addressing liquid crystal light valve, which adopts the proposal to correct the laser which is originally subjected to the optical addressing light valve and generates the polarization state change back to the correct polarization state through the light beam phase information regulation function of a wave plate component, thereby solving the problems of laser phase and polarization caused by the optical rotation effect and the double refraction effect of the material.
In a specific scheme, the optically addressed liquid crystal light valve device consists of a light valve component and a wave plate component, wherein the light valve component and the wave plate component are sequentially arranged from left to right, the outermost side of the light valve component is provided with a photoelectric substrate, the photoelectric substrate is usually made of crystal materials such as Bismuth Silicate (BSO), and the inside of the light valve component also comprises a first liquid crystal layer; the innermost side of the wave plate component is provided with a first transparent substrate, and the inside of the wave plate component also comprises a second liquid crystal layer; when the light valve component is particularly operated, if addressing light with triangular patterns is given to the light valve component, the information light is incident on the photoelectric substrate, the optical conductivity of the part of the photoelectric substrate irradiated by the addressing light is greatly increased, the voltage applied by the transparent conductive films at two sides of the first liquid crystal layer can fall on the first liquid crystal layer, the electric control birefringence effect of liquid crystal is realized, the liquid crystal corresponding to the position of the part of the addressing light which is not irradiated still keeps the original state, after the main laser passes through the light valve component, two parts which are modulated and not modulated are formed, and the separation of the two light beams can be realized through polarized light filtering, so that the target pattern light beam is obtained. In the above-mentioned modulation process, because the photoelectric substrate itself has optical rotation effect and birefringence effect, the liquid crystal itself has birefringence effect, thus the polarization direction of light beam rotates, and phase delay occurs, the polarization state changes, after the first liquid crystal layer is modulated, it can't realize the complete separation of triangle pattern through the polarizer or polarization beam splitter prism, so the scheme also has a wave plate component, the wave plate component has a second liquid crystal layer, the second liquid crystal layer has correction function, the required birefringence of the second liquid crystal layer can be obtained after calculating the phase and polarization change of the integral structure, the main laser light enters the second liquid crystal layer after passing through the first liquid crystal layer, the phase delay of the second liquid crystal layer just can eliminate the optical rotation effect, the birefringence effect and the birefringence effect of the liquid crystal in the non-modulation area of the photoelectric substrate, realize the correction of the integral polarization state of light beam, thus obtain a triangle pattern and a triangle pattern after passing through the polarizer or polarization beam splitter prism.
As a specific structure of the light valve assembly, the light valve assembly sequentially comprises a photoelectric substrate, an orientation layer, a first liquid crystal layer, an orientation layer and a transparent conductive film from the outer side face to the inner side face, wherein the transparent conductive film is deposited on the first transparent substrate.
As a specific structure of the passive fixed liquid crystal wave plate, the wave plate component sequentially comprises a second transparent substrate, an orientation layer, a second liquid crystal layer, an orientation layer and a first transparent substrate from the outer side face to the inner side face of the wave plate component, and the orientation layer on the inner side face of the second liquid crystal layer is coated on the first transparent substrate. In this scheme, the wave plate subassembly includes second transparent substrate, orientation layer, second liquid crystal layer, orientation layer and first transparent substrate to constitute passive fixed liquid crystal wave plate, wherein the birefringence of the liquid crystal that the second liquid crystal layer used is confirmed after the phase place of passing through the integral structure, polarization variation.
As a specific structure of the adjustable electric control liquid crystal wave plate, the wave plate component sequentially comprises a second transparent substrate, a transparent conductive film, an orientation layer, a second liquid crystal layer, an orientation layer, a transparent conductive film and a first transparent substrate from the outer side surface to the inner side surface of the wave plate component; the transparent conductive film at the innermost side of the wave plate component is deposited on the first transparent substrate; and the transparent conductive film at the outermost side of the wave plate component is deposited on the second transparent substrate. In this scheme, the wave plate subassembly includes second transparent substrate, transparent conductive film, orientation layer, second liquid crystal layer, orientation layer, transparent conductive film and first transparent substrate to constitute adjustable automatically controlled liquid crystal wave plate, because all be provided with transparent conductive film in the both sides face department of second liquid crystal layer this moment, so accessible transparent conductive film draws forth electrode and inserts electric drive module, directly adjusts automatically controlled liquid crystal wave plate voltage through electric drive module until phase place, the polarization variation that can compensate overall structure, therefore the birefringence of the liquid crystal that this second liquid crystal layer used can not do not limit.
As a redundancy scheme, a transparent conductive film is deposited on the side of the photoelectric substrate away from the first liquid crystal layer.
As a redundancy scheme, an antireflection film is deposited on one surface of the second transparent substrate far away from the second liquid crystal layer.
For assisting the whole heat dissipation of the device, the device performance is improved, the circumferential end parts of the first transparent substrate are beyond or partially beyond the light valve component and the wave plate component, and the beyond parts are connected with heat dissipation components. In the scheme, the size of the first transparent substrate is increased, namely the circumferential end parts of the first transparent substrate are beyond or partially beyond the light valve component and the wave plate component, then the radiating component is attached to or wrapped on the beyond part, the heat inside the light valve component and the wave plate component is simultaneously and rapidly guided out through the first transparent substrate, the overall performance of the device is improved, and the application requirement of long-time strong laser action in the processing and manufacturing field is met; the structure can improve the continuous strong laser performance of the existing light addressing light valve device by 3 times.
An optically addressed liquid crystal light valve comprising:
a light valve assembly and a wave plate assembly, both for transmitting a light beam;
The light valve component sequentially comprises a transparent conductive film, a photoelectric substrate, an orientation layer, a first liquid crystal layer, an orientation layer and a transparent conductive film from the outer side surface to the inner side surface;
The wave plate component comprises a fixed crystal wave plate, the fixed crystal wave plate is positioned on the inner side surface of the light valve component, and transparent conductive films on the inner side surface and the outer side surface are respectively deposited on the fixed crystal wave plate and the photoelectric substrate;
The fixed crystal wave plate is used for correcting the polarization state of polarized light which sequentially passes through the photoelectric substrate and the first liquid crystal layer.
In the scheme, the liquid crystal light valve is also provided with another light addressing type, and comprises a light valve component and a wave plate component which are all used for transmitting light beams; the light valve component has the same structural characteristics as the light valve component, the wave plate component comprises a fixed crystal wave plate, the wave plate component formed by the first transparent substrate, the second liquid crystal layer and the like is replaced by the fixed crystal wave plate, the liquid crystal wave plate is replaced by the fixed crystal wave plate, and the specific effect is realized by the functional coupling of the optically addressed liquid crystal light valve and the wave plate. The fixed crystal wave plate can be a quartz crystal wave plate, an air gap crystal wave plate and the like, and the thickness, the using direction and the using angle related to the phase modulation performance of the fixed crystal wave plate are determined by the phase and the polarization variation of the integral structure and can be determined through calculation.
For assisting the whole heat dissipation of the device, the device performance is improved, the circumferential end parts of the fixed crystal wave plate are beyond or partially beyond the light valve component and the wave plate component, and the exceeding parts are connected with heat dissipation components.
A preparation method of an optically addressed liquid crystal light valve comprises the following steps:
s1: depositing a transparent conductive film on one surface of the photoelectric substrate, coating an orientation layer on the other surface of the photoelectric substrate, and carrying out orientation curing;
S2: depositing a transparent conductive film on one or both sides of a first transparent substrate, and then coating an orientation layer on both sides of the first transparent substrate and carrying out orientation curing;
s3: depositing an antireflection film on one surface of the second transparent substrate;
s4: if the transparent conductive film is deposited on only one side of the first transparent substrate, directly coating an orientation layer on the other side of the second transparent substrate, and carrying out orientation curing;
If the transparent conductive film is deposited on both sides of the first transparent substrate, depositing the transparent conductive film on the other side of the second transparent substrate, and then coating an orientation layer and carrying out orientation curing;
S5: the three substrates are packaged into a box according to the sequence of the photoelectric substrate, the first transparent substrate and the second transparent substrate, and liquid crystal materials are injected under vacuum to form a first liquid crystal layer and a second liquid crystal layer.
In the above steps, there are two preparation methods of the optically addressed liquid crystal light valve, as in step S4, when a transparent conductive film is deposited on only one side of a first transparent substrate, an alignment layer is directly coated on the other side of a second transparent substrate and is aligned and cured, the wave plate component prepared by this step is a passive fixed liquid crystal wave plate, and the birefringence of the liquid crystal used in the second liquid crystal layer is determined by calculating the phase and polarization variation of the overall structure. When in use, the lead-out electrode of the transparent conductive film is connected with the electric driving module, and the heat dissipation assembly is externally connected with the cooling system.
If transparent conductive films are deposited on both sides of the first transparent substrate, then a transparent conductive film is deposited on the other side of the second transparent substrate, then an orientation layer is coated and oriented and solidified, the wave plate component prepared by the step is an adjustable electric control liquid crystal wave plate, so that the electric drive module can be connected with the wave plate component through the extraction electrode of the transparent conductive film, and the electric control liquid crystal wave plate voltage can be directly adjusted through the electric drive module until the phase and polarization variation of the integral structure can be compensated, and the birefringence of liquid crystal used by the second liquid crystal layer can be not limited.
In addition, the preparation method of the optically addressed liquid crystal light valve is also provided with a fixed crystal wave plate, wherein in the preparation process, a transparent conductive film is deposited on one side of a photoelectric substrate, an orientation layer is coated on the other side of the photoelectric substrate, the orientation layer is oriented and cured, an anti-reflection film is deposited on one side of the fixed crystal wave plate, and the orientation layer is coated on the other side of the fixed crystal wave plate after the transparent conductive film is deposited, and the orientation layer is oriented and cured. And packaging the processed photoelectric substrate and the fixed crystal wave plate into a box, and injecting a liquid crystal material under vacuum to form a first liquid crystal layer to obtain a complete device structure. The fixed crystal wave plate is adopted to replace the liquid crystal wave plate, and the specific effect is realized by the functional coupling of the optically addressed liquid crystal light valve and the wave plate. The fixed crystal wave plate can be a quartz crystal wave plate, an air gap crystal wave plate and the like, and the thickness, the using direction and the using angle related to the phase modulation performance of the fixed crystal wave plate are determined by the phase and the polarization variation of the integral structure and can be determined through calculation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. According to the optical addressing liquid crystal light valve and the preparation method thereof, the scheme is adopted, and laser which is originally subjected to the optical addressing light valve and generates polarization state change is corrected back to the correct polarization state through the light beam phase information regulation function of the wave plate component, so that the problems of laser phase and polarization caused by the optical rotation effect and the double refraction effect of the material are solved.
2. According to the light addressing liquid crystal light valve and the preparation method thereof provided by the invention, the heat dissipation requirements of the light addressing liquid crystal light valve and the wave plate are brought into structural design, the size of the first transparent substrate is increased, the heat dissipation component is added on the substrate, the heat inside the light valve component and the wave plate component is simultaneously and rapidly led out through the first transparent substrate, the overall performance of the device is improved, and the application requirements of long-time strong laser action in the processing and manufacturing field are met. The structure can improve the continuous strong laser performance of the existing light addressing light valve device by 3 times.
3. The invention provides an optically addressed liquid crystal light valve and a preparation method thereof, which are designed with the structural forms of three wave plate components, namely a passive fixed liquid crystal wave plate, an adjustable electric control liquid crystal wave plate and a fixed crystal wave plate structure, wherein the double refractive index of liquid crystal used by a second liquid crystal layer in the passive fixed liquid crystal wave plate is determined by calculating the phase and polarization change quantity of the integral structure; the adjustable electric control liquid crystal wave plate can be connected with the electric drive module through the leading-out electrode of the transparent conductive film 1, and the voltage of the electric control liquid crystal wave plate can be adjusted until the phase and the polarization variation of the whole structure can be compensated, so that the birefringence of liquid crystal used by the second liquid crystal layer can be unlimited; the fixed crystal wave plate structure is used for replacing the liquid crystal wave plate, and the specific effect is realized by the functional coupling of the optically addressed liquid crystal light valve and the wave plate. The fixed crystal wave plate can be a quartz crystal wave plate, an air gap crystal wave plate and the like, and the thickness, the using direction and the using angle related to the phase modulation performance of the fixed crystal wave plate are determined by the phase and the polarization variation of the integral structure and can be determined through calculation.
4. The invention integrates and couples the light valve and the wave plate into a whole to form an optical addressing light valve device with complete functions and performances, and adds a cooling design to form a high-integration and high-performance light valve device.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:
Fig. 1 is a schematic structural diagram of an optically addressed liquid crystal light valve according to an embodiment provided in this embodiment;
FIG. 2 is a schematic diagram of an optically addressed liquid crystal light valve according to another embodiment of the present disclosure;
Fig. 3 is a schematic structural diagram of an optically addressed liquid crystal light valve according to another embodiment of the present disclosure.
In the drawings, the reference numerals and corresponding part names:
The liquid crystal display comprises a 1-transparent conductive film, a 2-photoelectric substrate, a 3-orientation layer, a 4-first liquid crystal layer, a 5-first transparent substrate, a 6-second liquid crystal layer, a 7-second transparent substrate, an 8-antireflection film, a 9-heat dissipation component and a 10-fixed crystal wave plate.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1: the embodiment 1 provides a specific structure of an optically addressed liquid crystal light valve, as shown in fig. 1, where the optically addressed liquid crystal light valve (comprising a transparent conductive film 1, a photoelectric substrate 2, an alignment layer 3, a first liquid crystal layer 4, an alignment layer 3, a transparent conductive film 1, and a first transparent substrate 5 in sequence from left to right in fig. 1) is combined with a wave plate structure (comprising an antireflection film 8, a second transparent substrate 7, an alignment layer 3, a second liquid crystal layer 6, an alignment layer 3, and a first transparent substrate 5 in sequence from right to left in fig. 1) to form a novel optically addressed liquid crystal light valve device, and the novel optically addressed liquid crystal light valve device corrects laser, which is originally subjected to polarization state change, back to a correct polarization state through a light beam phase information regulation function of the wave plate structure, so as to solve the problems of laser phase and polarization caused by optical rotation effects and birefringence effects of the material itself.
The preparation method comprises the following steps: a transparent conductive film 1 is deposited on one side of a photoelectric substrate 2, an orientation layer 3 is coated on the other side of the photoelectric substrate and oriented and cured, the transparent conductive film 1 is deposited on one side of a first transparent substrate 5, the orientation layer 3 is coated on the two sides and oriented and cured, an anti-reflection film 8 is deposited on one side of a second transparent substrate 7, and the orientation layer 3 is coated on the other side and oriented and cured. The three substrates were packaged into a box, and liquid crystal material was injected under vacuum to form a first liquid crystal layer 4 and a second liquid crystal layer 6, resulting in a complete device structure as shown in fig. 1. Since the wave plate in embodiment 1 is a passive fixed liquid crystal wave plate, the birefringence of the liquid crystal used in the second liquid crystal layer 6 is determined by calculating the phase and polarization change of the overall structure. When in use, the leading-out electrode of the transparent conductive film 1 is connected with the electric driving module, and the heat dissipation component 9 is externally connected with the cooling system.
Example 2: the embodiment 2 provides a specific structure of an optically addressed liquid crystal light valve, as shown in fig. 2, where the optically addressed liquid crystal light valve (comprising, from left to right in fig. 2, a transparent conductive film 1, an electro-optical substrate 2, an alignment layer 3, a first liquid crystal layer 4, an alignment layer 3, a transparent conductive film 1, and a first transparent substrate 5) is combined with a wave plate structure (comprising, from right to left in fig. 2, an antireflection film 8, a second transparent substrate 7, a transparent conductive film 1, an alignment layer 3, a second liquid crystal layer 6, an alignment layer 3, a transparent conductive film 1, and a first transparent substrate 5) to form a novel optically addressed liquid crystal device.
The preparation method comprises the following steps: a transparent conductive film 1 is deposited on one surface of a photoelectric substrate 2, an orientation layer 3 is coated on the other surface of the photoelectric substrate and is oriented and cured, the transparent conductive film 1 is deposited on the two surfaces of a first transparent substrate 5, the orientation layer 3 is coated on the two surfaces of the first transparent substrate 5 and is oriented and cured, an anti-reflection film 8 is deposited on one surface of a second transparent substrate 7, and the orientation layer 3 is coated on the other surface of the second transparent substrate 7 and is oriented and cured after the transparent conductive film 1 is deposited. The three substrates were packaged into a box, and liquid crystal material was injected under vacuum to form a first liquid crystal layer 4 and a second liquid crystal layer 6, resulting in a complete device structure, as shown in fig. 2. In embodiment 2, the birefringence of the liquid crystal used in the second liquid crystal layer 6 is not limited as compared with embodiment 1 using the tunable electronically controlled liquid crystal wave plate. When the liquid crystal display device is used, the leading-out electrode of the transparent conductive film 1 is connected with an electric driving module, the voltage of the electric control liquid crystal wave plate is regulated until the phase and polarization variation of the whole structure can be compensated, and the heat radiating component 9 is externally connected with a cooling system.
Example 3: the specific structure of the optically addressed liquid crystal light valve is provided in this embodiment 3, as shown in fig. 3, where the optically addressed liquid crystal light valve (comprising the transparent conductive film 1, the electro-optical substrate 2, the alignment layer 3, the first liquid crystal layer 4, the alignment layer 3, the transparent conductive film 1, and the fixed crystal wave plate sequentially from left to right in fig. 3) and the wave plate structure (comprising the fixed crystal wave plate 10 on the right in fig. 2) are combined to form a novel optically addressed liquid crystal light valve device.
The preparation method comprises the following steps: a transparent conductive film 1 is deposited on one side of a photoelectric substrate 2, an orientation layer 3 is coated on the other side of the photoelectric substrate and is oriented and cured, an anti-reflection film 8 is deposited on one side of a fixed crystal wave plate 10, and the orientation layer 3 is coated on the other side of the fixed crystal wave plate 10 after the transparent conductive film 1 is deposited and is oriented and cured. The processed electro-optical substrate 2 and the fixed crystal waveplate 10 are packaged into a box, and a liquid crystal material is injected under vacuum to form a first liquid crystal layer 4, so that a complete device structure is obtained, as shown in fig. 3. Embodiment 3 uses a fixed crystal wave plate 10 instead of a liquid crystal wave plate, and essentially achieves a specific effect by optically addressing the functional coupling of the liquid crystal light valve and the wave plate. The fixed crystal waveplate 10 may be a quartz crystal waveplate, an air gap crystal waveplate, or the like, and the thickness, the direction of use, and the angle related to the phase modulation performance of the fixed crystal waveplate 10 are determined by the phase and the polarization variation of the overall structure, and can be determined by calculation. When in use, the leading-out electrode of the transparent conductive film 1 is connected with the electric driving module, and the heat dissipation component 9 is externally connected with the cooling system.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. An optically addressed liquid crystal light valve, comprising:
A light valve assembly and a wave plate assembly, both for transmitting light beams, the light valve assembly comprising an electro-optical substrate (2) at the outer side and a first liquid crystal layer (4) at the inside;
The wave plate component comprises a first transparent substrate (5) positioned on the inner side surface and a second liquid crystal layer (6) positioned in the inner side surface, and the light valve component is positioned on one surface of the first transparent substrate (5) away from the second liquid crystal layer (6);
The second liquid crystal layer (6) is used for correcting the polarization state of polarized light which sequentially passes through the photoelectric substrate (2) and the first liquid crystal layer (4).
2. An optically addressed liquid crystal light valve according to claim 1, characterized in that the light valve assembly comprises, in order from its outer side to its inner side, an electro-optical substrate (2), an alignment layer (3), a first liquid crystal layer (4), an alignment layer (3) and a transparent conductive film (1), said transparent conductive film (1) being deposited on said first transparent substrate (5).
3. The optically addressed liquid crystal light valve according to claim 2, wherein the wave plate assembly comprises a second transparent substrate (7), an alignment layer (3), a second liquid crystal layer (6), an alignment layer (3) and a first transparent substrate (5) in sequence from the outer side surface to the inner side surface, and the alignment layer (3) on the inner side surface of the second liquid crystal layer (6) is coated on the first transparent substrate (5).
4. The optically addressed liquid crystal light valve according to claim 2, wherein the wave plate assembly comprises, in order from the outer side to the inner side thereof, a second transparent substrate (7), a transparent conductive film (1), an alignment layer (3), a second liquid crystal layer (6), an alignment layer (3), a transparent conductive film (1) and a first transparent substrate (5); the innermost transparent conductive film (1) of the wave plate component is deposited on the first transparent substrate (5); the outermost transparent conductive film (1) of the wave plate assembly is deposited on the second transparent substrate (7).
5. An optically addressed liquid crystal light valve according to claim 1, characterized in that the side of the electro-optical substrate (2) remote from the first liquid crystal layer (4) is deposited with a transparent conductive film (1).
6. An optically addressed liquid crystal light valve according to claim 1, characterized in that the side of the second transparent substrate (7) remote from the second liquid crystal layer (6) is deposited with an anti-reflection film (8).
7. An optically addressed liquid crystal light valve according to any one of claims 1 to 6, wherein the peripheral ends of the first transparent substrate (5) extend beyond or partially beyond the light valve assembly and the wave plate assembly, and the excess is connected to a heat sink assembly (9).
8. An optically addressed liquid crystal light valve, comprising:
a light valve assembly and a wave plate assembly, both for transmitting a light beam;
The light valve component sequentially comprises a transparent conductive film (1), a photoelectric substrate (2), an orientation layer (3), a first liquid crystal layer (4), an orientation layer (3) and the transparent conductive film (1) from the outer side surface to the inner side surface;
The wave plate assembly comprises a fixed crystal wave plate (10), the fixed crystal wave plate (10) is positioned on the inner side surface of the light valve assembly, and transparent conductive films (1) on the inner side surface and the outer side surface are respectively deposited on the fixed crystal wave plate (10) and the photoelectric substrate (2);
the fixed crystal wave plate (10) is used for correcting the polarization state of polarized light which sequentially passes through the photoelectric substrate (2) and the first liquid crystal layer (4).
9. An optically addressed liquid crystal light valve according to claim 8, characterized in that the fixed crystal waveplate (10) has peripheral ends which extend beyond or partially beyond the light valve assembly and waveplate assembly, the excess being connected to a heat sink assembly (9).
10. The preparation method of the optically addressed liquid crystal light valve is characterized by comprising the following steps:
S1: depositing a transparent conductive film (1) on one surface of a photoelectric substrate (2), coating an orientation layer (3) on the other surface of the photoelectric substrate, and carrying out orientation curing;
S2: depositing a transparent conductive film (1) on one or both sides of a first transparent substrate (5), and then coating an orientation layer (3) on both sides of the first transparent substrate (5) and carrying out orientation curing;
S3: depositing an antireflection film (8) on one surface of the second transparent substrate (7);
s4: if the transparent conductive film (1) is deposited on only one surface of the first transparent substrate (5), the other surface of the second transparent substrate (7) is directly coated with the orientation layer (3) and is oriented and cured;
If the transparent conductive film (1) is deposited on both sides of the first transparent substrate (5), the transparent conductive film (1) is deposited on the other side of the second transparent substrate (7), and then the alignment layer (3) is coated and cured in an alignment manner;
S5: the three substrates are packaged into a box according to the sequence of the photoelectric substrate (2), the first transparent substrate (5) and the second transparent substrate (7), and liquid crystal materials are injected under vacuum to form a first liquid crystal layer (4) and a second liquid crystal layer (6).
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| CN119575688A (en) * | 2025-01-27 | 2025-03-07 | 中国工程物理研究院流体物理研究所 | Polarization laser beam splitting device and application method thereof |
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