CN116909051A - Polarization insensitive liquid crystal device - Google Patents
Polarization insensitive liquid crystal device Download PDFInfo
- Publication number
- CN116909051A CN116909051A CN202211493120.0A CN202211493120A CN116909051A CN 116909051 A CN116909051 A CN 116909051A CN 202211493120 A CN202211493120 A CN 202211493120A CN 116909051 A CN116909051 A CN 116909051A
- Authority
- CN
- China
- Prior art keywords
- polarization
- liquid crystal
- spatial light
- crystal device
- reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000010287 polarization Effects 0.000 title claims abstract description 98
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 72
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 25
- 239000010703 silicon Substances 0.000 claims abstract description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 10
- 239000003989 dielectric material Substances 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 150000003376 silicon Chemical class 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G02F1/133528—Polarisers
- G02F1/13355—Polarising beam splitters [PBS]
-
- 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
- G02F1/133553—Reflecting elements
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- 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 application discloses a polarization insensitive liquid crystal device, wherein the main structure of a silicon-based liquid crystal device comprises a glass front plate, a liquid crystal layer and a track backboard, wherein the glass front plate is composed of materials such as a polarization beam splitter, a 1/4 wave plate, a reflector and the like, the working polarization direction of the silicon-based liquid crystal device is s polarization, an incident light beam passes through the polarization beam splitter, and a p polarization state part directly passes through the reflector 2 and is distributed to one area of a liquid crystal spatial light modulator; the s polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into p polarization, and is finally distributed to another area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is p polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
Description
Technical Field
The application relates to the technical field of liquid crystal on silicon equipment, in particular to a polarization insensitive liquid crystal device.
Background
The basic structural main components of the liquid crystal on silicon (liquid crystal on silicon, LCOS) device comprise a glass front plate, a liquid crystal layer and a silicon-based back plate; the silicon-based backboard is a CMOS circuit and is provided with a pixel array; the voltage of each pixel can be independently controlled so as to control the liquid crystal material in the liquid crystal layer in the corresponding area of the pixel; along with the change of the electric field, the equivalent refractive index of the liquid crystal material for a certain specific polarized light beam can be changed, so that the spatial phase modulation of the polarized incident light beam is realized; for the polarized light beams orthogonal to the design direction of the device, the isofocal refractive index of the liquid crystal layer is unchanged regardless of the voltage of the pixel electrode, and no spatial phase modulation is generated on the light.
At present, the technical solutions of polarization insensitive LCOS devices mainly comprise the following steps of; the first scheme is that a 1/4 wave plate is added between the pixel array and the liquid crystal layer, and the polarization state of incident light is turned over by 90 degrees; thus, the light beam modulated by the liquid crystal layer at the time of incidence and not modulated by the liquid crystal layer again at the time of emergence; the light beam which passes through the liquid crystal layer without being modulated when entering and passes through the liquid crystal layer again when exiting can be modulated; the light beams with two polarization states are modulated once by the liquid crystal layer, and the device is insensitive to the polarization state of the incident light beam; the main problem with this approach is that the thickness of the liquid crystal layer needs to be doubled for a phase modulation of >2 pi; this is because the beam is modulated by the liquid crystal only one way in the incident or exit; thicker liquid crystal layers can cause stronger pixel crosstalk, affecting the quality of beam modulation; in addition, the introduction of the 1/4 wave plate can also cause pixel crosstalk, and the light beam modulation quality is affected.
The second scheme is that an incident light beam is divided into an s-polarized light beam and a p-polarized light beam by a polarization beam splitter and respectively enters two silicon-based liquid crystal spatial light modulators; the designed polarization working directions of the two LCOS spatial light modulators respectively correspond to s and p polarization states; therefore, the system can realize insensitive modulation on polarization of incident light; however, in this design, 2 liquid crystal on silicon devices are required, and a high requirement is placed on the assembly of two liquid crystal on silicon devices, the angle must be 90 degrees, otherwise, the transmission directions of the outgoing 2 polarized light beams are inconsistent.
Therefore, in the practical use process, in order to realize the spatial phase modulation of the light beam, the incident light beam needs to be linearly polarized light, and the polarization direction is consistent with the design working direction of the LCOS device; if the incident light is circularly polarized light, elliptically polarized light or the linear polarization state direction is inconsistent with the design working direction of the device, the phenomenon that part of light beams are not modulated by the device exists; there is therefore an urgent need to develop a liquid crystal on silicon device that is insensitive to the polarization state of incident light.
Disclosure of Invention
The present application aims to provide a polarization insensitive liquid crystal device capable of performing spatial light modulation insensitive to the polarization state of incident light without resorting to optical elements.
In order to achieve the above purpose, the present application provides the following technical solutions: the main structure of the silicon-based liquid crystal device comprises a glass front plate, a liquid crystal layer and a track backboard, wherein the glass front plate is composed of materials such as a polarization beam splitter, a 1/4 wave plate, a reflector and the like, the working polarization direction of the silicon-based liquid crystal device is s polarization, an incident light beam passes through the polarization beam splitter, and a p polarization state part directly passes through the reflector 2 and is distributed to one area of a liquid crystal spatial light modulator; the s polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into p polarization, and is finally distributed to another area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is p polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
Preferably, the incident light beam passes through the polarization beam splitter, and the s-polarized state part directly passes through the reflector 2 and is distributed to one area of the liquid crystal spatial light modulator; the P polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into s polarization, and is finally distributed to the other area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is s polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
Preferably, the material of the polarization beam splitter is properly selected, i.e. the refractive index of the material cannot be lower than 1.4, and the reflecting mirror 2 in the above structure can be removed, so that the polarized light beam is efficiently reflected to the liquid crystal on silicon device based on the principle of total internal reflection, and no loss of energy of the light beam exists.
Preferably, the mirror 1 may be a standard gold or silver or aluminum plated mirror for LCOS device operating wavelength, or may be a dielectric mirror having multiple layers of dielectric material laminated; the multilayer dielectric film with high reflectivity can be directly coated on the upper surface of the 1/4 wave plate, so that high-efficiency light beam reflection is realized.
Compared with the prior art, the application has the beneficial effects that:
(1) The application realizes the spatial light modulation insensitive to the polarization state of the incident light.
(2) The liquid crystal on silicon device is an integrated system and does not require the assistance of separate optical elements.
(3) No pixel crosstalk is introduced, i.e. the thickness of the liquid crystal layer is not increased.
(4) The optical paths of the two polarized light beams in the system are consistent.
Drawings
FIG. 1 is a schematic diagram of the basic structure of a polarization insensitive LCOS device of the present application;
FIG. 2 is a schematic diagram of the basic structure of a LCOS device of the present application;
FIG. 3 is a schematic diagram of a polarization insensitive LCOS modulation structure according to the present application;
FIG. 4 is a schematic diagram of a polarization insensitive LCOS modulator structure 1 of the present application;
FIG. 5 is a schematic diagram of a polarization insensitive LCOS modulator structure 2 of the present application;
FIG. 6 is a schematic diagram of a polarization insensitive LCOS modulator structure 3 of the present application;
fig. 7 is a schematic diagram of a polarization insensitive liquid crystal on silicon modulator structure 4 of the present application.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the application. In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, the new design of the front glass of the liquid crystal on silicon device of the present application allows polarization insensitive spatial light modulation; the main structure of the silicon-based liquid crystal device comprises a glass front plate, a liquid crystal layer and a track backboard, wherein the glass front plate is formed by materials such as a polarization beam splitter, a 1/4 wave plate, a reflector and the like, the working polarization direction of the silicon-based liquid crystal device is s polarization, an incident light beam passes through the polarization beam splitter, and a p polarization state part directly passes through the reflector 2 and is distributed to one area of the liquid crystal spatial light modulator; the s polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into p polarization, and is finally distributed to another area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is p polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation for the two polarization states is formed; fig. 2 is a schematic diagram of the basic structure of a liquid crystal on silicon device, and fig. 3 is a schematic diagram of the second scheme described in the background art.
The incident light beam passes through the polarization beam splitter, the s-polarized part directly passes through the reflecting mirror 2 and is distributed to one area of the liquid crystal spatial light modulator; the P polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into s polarization, and is finally distributed to the other area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is s polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
If the material of the polarization beam splitter is properly selected, that is, the refractive index of the material cannot be lower than 1.4, the reflector 2 in fig. 4 can be removed; as shown in fig. 5, the s-polarized light beam is now reflected to the liquid crystal on silicon device with high efficiency based on the principle of total internal reflection; thus, the structure in fig. 5 has the same function as the structure of fig. 4, and there is no loss of beam energy.
Similarly, if the materials of the polarization beam splitter are properly selected, the structure shown in fig. 6 can be simplified into the structure shown in fig. 7, that is, the mirror 2 is removed, and the light beam is efficiently reflected onto the liquid crystal on silicon device by the total internal reflection principle at the interface, so that no light beam energy loss is generated.
In the configuration shown in fig. 4-7, mirror 1 can be a standard gold or silver or aluminum plated mirror for LCOS device operating wavelength, or can be a dielectric mirror with a stack of multiple layers of dielectric materials; the multilayer dielectric film with high reflectivity can be directly coated on the upper surface of the 1/4 wave plate, so that high-efficiency light beam reflection is realized.
The above embodiments are only preferred embodiments of the present application, and are not limiting to the technical solutions of the present application, and any technical solution that can be implemented on the basis of the above embodiments without inventive effort should be considered as falling within the scope of protection of the patent claims of the present application.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A polarization insensitive liquid crystal device characterized by: the main structure of the silicon-based liquid crystal device comprises a glass front plate, a liquid crystal layer and a track backboard, wherein the glass front plate is composed of a polarization beam splitter, a 1/4 wave plate, a reflector and other materials, the working polarization direction of the silicon-based liquid crystal device is s polarization, an incident light beam passes through the polarization beam splitter, and a p polarization state part directly passes through the reflector 2 and is distributed to one area of the liquid crystal spatial light modulator; the s polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into p polarization, and is finally distributed to another area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is p polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
2. A polarization insensitive liquid crystal device according to claim 1 wherein: the incident light beam passes through the polarization beam splitter, and the s-polarized part directly passes through the reflector 2 and is distributed to one area of the liquid crystal spatial light modulator; the P polarization state is partially reflected, passes through the 1/4 wave plate for 2 times and the reflecting mirror 1, is converted into s polarization, and is finally distributed to the other area of the liquid crystal spatial light modulator; the design polarization direction of the liquid crystal spatial light modulator is s polarization direction, so that the spatial modulation of two light beams is realized; the modulated light beams are spatially combined again through the structure and respectively have different polarization states, and finally equivalent spatial light modulation of the two polarization states is formed.
3. A polarization insensitive liquid crystal device according to claims 1, 2, characterized in that: the material selection of the polarization beam splitter is proper, namely the refractive index of the material cannot be lower than 1.4, the reflecting mirror 2 in the structure can be removed, and the polarized light beam is efficiently reflected to the silicon-based liquid crystal device based on the principle of total internal reflection, and no loss of light beam energy exists.
4. A polarization insensitive liquid crystal device according to claims 1, 2, characterized in that: the reflector 1 can be a standard gold-plated or silver-plated or aluminum-plated reflector for LCOS device working wavelength, or can be a dielectric reflector with a plurality of layers of dielectric materials laminated; the multilayer dielectric film with high reflectivity can be directly coated on the upper surface of the 1/4 wave plate, so that high-efficiency light beam reflection is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211493120.0A CN116909051B (en) | 2022-11-25 | 2022-11-25 | Polarization insensitive silicon-based liquid crystal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211493120.0A CN116909051B (en) | 2022-11-25 | 2022-11-25 | Polarization insensitive silicon-based liquid crystal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116909051A true CN116909051A (en) | 2023-10-20 |
| CN116909051B CN116909051B (en) | 2024-07-16 |
Family
ID=88361464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211493120.0A Active CN116909051B (en) | 2022-11-25 | 2022-11-25 | Polarization insensitive silicon-based liquid crystal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116909051B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588162A (en) * | 2004-09-17 | 2005-03-02 | 华中科技大学 | Two path 2X2 light switch and 4X4 free space light switch composed of it |
| US20100171928A1 (en) * | 2009-01-06 | 2010-07-08 | Herb He Huang | Single-imager projection engine assembly |
| CN101930126A (en) * | 2009-06-23 | 2010-12-29 | 江苏丽恒电子有限公司 | Integrated single sided board projection engine |
| CN102906626A (en) * | 2010-05-19 | 2013-01-30 | 3M创新有限公司 | Polarized projection illuminator |
| US20130162954A1 (en) * | 2011-12-22 | 2013-06-27 | Min Aik Technology Co., Ltd. | Lcos projection system |
| CN104049375A (en) * | 2014-06-05 | 2014-09-17 | 华中科技大学 | Polarization independent space light modulation method and device |
| CN104216116A (en) * | 2013-05-23 | 2014-12-17 | 全视技术有限公司 | Near-eye display systems, devices and methods |
| US20160097930A1 (en) * | 2014-10-06 | 2016-04-07 | Steven John Robbins | Microdisplay optical system having two microlens arrays |
| CN209356770U (en) * | 2019-03-08 | 2019-09-06 | 中国电子科技集团公司电子科学研究院 | Polarize unrelated phasing device |
| CN112505835A (en) * | 2020-12-09 | 2021-03-16 | 华太极光光电技术有限公司 | Polarization-independent optical path scanning delay device and method |
| US20210096358A1 (en) * | 2018-04-26 | 2021-04-01 | Cart Zeiss Microscopy GmbH | Optical arrangement and method for light beam shaping for a light microscope |
| CN216118212U (en) * | 2020-09-11 | 2022-03-22 | 鲁姆斯有限公司 | Optical system |
-
2022
- 2022-11-25 CN CN202211493120.0A patent/CN116909051B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588162A (en) * | 2004-09-17 | 2005-03-02 | 华中科技大学 | Two path 2X2 light switch and 4X4 free space light switch composed of it |
| US20100171928A1 (en) * | 2009-01-06 | 2010-07-08 | Herb He Huang | Single-imager projection engine assembly |
| CN101930126A (en) * | 2009-06-23 | 2010-12-29 | 江苏丽恒电子有限公司 | Integrated single sided board projection engine |
| CN102906626A (en) * | 2010-05-19 | 2013-01-30 | 3M创新有限公司 | Polarized projection illuminator |
| US20130162954A1 (en) * | 2011-12-22 | 2013-06-27 | Min Aik Technology Co., Ltd. | Lcos projection system |
| CN104216116A (en) * | 2013-05-23 | 2014-12-17 | 全视技术有限公司 | Near-eye display systems, devices and methods |
| CN104049375A (en) * | 2014-06-05 | 2014-09-17 | 华中科技大学 | Polarization independent space light modulation method and device |
| US20160097930A1 (en) * | 2014-10-06 | 2016-04-07 | Steven John Robbins | Microdisplay optical system having two microlens arrays |
| US20210096358A1 (en) * | 2018-04-26 | 2021-04-01 | Cart Zeiss Microscopy GmbH | Optical arrangement and method for light beam shaping for a light microscope |
| CN209356770U (en) * | 2019-03-08 | 2019-09-06 | 中国电子科技集团公司电子科学研究院 | Polarize unrelated phasing device |
| CN216118212U (en) * | 2020-09-11 | 2022-03-22 | 鲁姆斯有限公司 | Optical system |
| CN112505835A (en) * | 2020-12-09 | 2021-03-16 | 华太极光光电技术有限公司 | Polarization-independent optical path scanning delay device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116909051B (en) | 2024-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9201286B2 (en) | Method and apparatus for wavelength selective switch | |
| TW390965B (en) | Electric field controllable beam-directing structures | |
| Crawford | Electrically switchable Bragg gratings | |
| US6175667B1 (en) | High-speed polarization-insensitive electro-optic modulator | |
| CN108681197B (en) | Projection display device and direct-view display device | |
| US7084937B2 (en) | Liquid crystal display and backlight module thereof with reflective polarizer and quarter wave plate | |
| US20030058516A1 (en) | Dynamic spectral equalizer and wavelength selective switch having extremely low polarization dependent loss and polarization mode dispersion | |
| CN116909051B (en) | Polarization insensitive silicon-based liquid crystal device | |
| EP1255156A2 (en) | Tunable optical filter | |
| US8620131B2 (en) | Variable optical attenuator (VOA) | |
| JP2005003758A (en) | Reflective optical modulator and variable optical attenuator | |
| Riza | Liquid-crystal-based optical time-delay control system for wideband phased arrays | |
| US7256847B2 (en) | Board with cholesteric layer and display having the board | |
| JP3149120B2 (en) | Tunable wavelength optical filter | |
| CN100526939C (en) | Optical switch | |
| Riza | 25-Channel nematic liquid-crystal optical time-delay unit characterization | |
| US7263250B1 (en) | Optical switch using polarization beam splitters | |
| US20040201794A1 (en) | Liquid crystal display and backlight module thereof | |
| JP4092986B2 (en) | Light switch | |
| CN214151272U (en) | Low-loss wave combining device | |
| US20030058517A1 (en) | High contrast reflective LCD for telecommunications applications | |
| CN104133316A (en) | Polarized light generating device and display device | |
| Riza | Three-dimensional optical time delay units for radar | |
| JPH04140714A (en) | Variable wavelength filter module | |
| CN220933323U (en) | Electro-optical switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |