CN208737174U - Compound liquid-crystal device for light beam deflection - Google Patents
Compound liquid-crystal device for light beam deflection Download PDFInfo
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- CN208737174U CN208737174U CN201821445478.5U CN201821445478U CN208737174U CN 208737174 U CN208737174 U CN 208737174U CN 201821445478 U CN201821445478 U CN 201821445478U CN 208737174 U CN208737174 U CN 208737174U
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- liquid crystal
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- polarization gratings
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 154
- 150000001875 compounds Chemical class 0.000 title claims abstract description 42
- 230000010287 polarization Effects 0.000 claims abstract description 45
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 239000011521 glass Substances 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000010408 film Substances 0.000 claims description 65
- 230000003667 anti-reflective effect Effects 0.000 claims description 5
- 239000005264 High molar mass liquid crystal Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 244000154870 Viola adunca Species 0.000 description 1
- 235000005811 Viola adunca Nutrition 0.000 description 1
- 235000013487 Viola odorata Nutrition 0.000 description 1
- 235000002254 Viola papilionacea Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- Liquid Crystal (AREA)
Abstract
The utility model discloses the compound liquid-crystal devices deflected for light beam, comprising: liquid crystal cell, dielectric film and the liquid crystal polarization gratings of adjustable liquid crystal half-wave piece；The liquid crystal cell, for controlling the direction of rotation of incident circularly polarized light by automatically controlled switching；The liquid crystal polarization gratings, for being deflected to the circularly polarized light after the liquid crystal cell；The liquid crystal cell and the liquid crystal polarization gratings share a glass substrate；The dielectric film is plated on the surface of the liquid crystal cell, and the liquid crystal polarization gratings are attached on the dielectric film；The dielectric film transmits the operation wavelength of the compound liquid-crystal device, and reflects light orientation exposure wavelength.The compound liquid-crystal device of the utility model, it is compact-sized, thickness is smaller, improve the optical loss characteristic of entire light deflection, and the light orientation structure inside the liquid crystal cell of adjustable liquid crystal half-wave piece can be prevented in the fabrication process by secondary erasable.
Description
Technical field
The utility model relates to optical device fields, in particular to the compound liquid-crystal device for light beam deflection.
Background technique
Liquid crystal polarization gratings as a kind of novel beam deflection controller part, have deflection angle is big, diffraction efficiency is high,
It is small in size, light-weight, low in energy consumption, can multi-disc cascade carry out it is automatically controlled scanning etc. excellent characteristics, laser electric scanning, photoelectronic imaging with
The fields such as detection, target pointing, laser sensing and space communication have important application value.
It is general by the way of multi-disc liquid crystal polarization gratings stacking when current liquid crystal polarization gratings are deflected for light beam,
Realize the automatically controlled scanning of multiple angles.With the increase of deflection angle number Q, the piece number N that liquid crystal polarization gratings stack also with
Increase, the quantitative relationship between them are as follows: Q=2N.In the very more application deflection angle number Q, liquid crystal polarization gratings
The piece number N of stacking also increases to ten or more.
Light beam can generate loss, the piece number N especially stacked in liquid crystal polarization gratings when passing through liquid-crystal polarized-light gate device
When larger, multi-disc liquid crystal polarization gratings, which stack generated optical loss, to be become can not be ignored, and the integral thickness of device
As a problem in need of consideration, these problems, which become, restricts an important factor for beam deflection angle degree mesh further increases,
It needs to be resolved.
Utility model content
The utility model embodiment provides the compound liquid-crystal device for light beam deflection.For the embodiment to disclosure
Some aspects have a basic understanding, and simple summary is shown below.The summarized section is not extensive overview, nor wanting
It determines key/critical component or describes the protection scope of these embodiments.Its sole purpose is presented with simple form
Some concepts, in this, as the preamble of following detailed description.
The utility model embodiment provides a kind of compound liquid-crystal device for light beam deflection, comprising: adjustable liquid crystal half-wave
Liquid crystal cell, liquid crystal polarization gratings and the dielectric film of piece；
The liquid crystal cell, for controlling the direction of rotation of incident circularly polarized light by automatically controlled switching；
The liquid crystal polarization gratings, for being deflected to the circularly polarized light after the liquid crystal cell；
The liquid crystal cell and the liquid crystal polarization gratings share a glass substrate；
The dielectric film is plated on the surface of the liquid crystal cell, and the liquid crystal polarization gratings are attached to the dielectric film
On；
The dielectric film transmits the operation wavelength of the compound liquid-crystal device, and reflects light orientation exposure wavelength.
Based on the compound liquid-crystal device, as optional first embodiment, the liquid crystal cell, comprising: along normal direction
The top glass substrate that successively fits closely, upper conductive film, upper liquid crystal oriented film, liquid crystal layer, lower liquid crystal aligning film, under lead
Conductive film and lower glass substrate；
The dielectric film is plated on the outer surface of the lower glass substrate.
Based on the first embodiment, as optional second embodiment, the lower glass substrate is vertical with the normal
Two surfaces, handled through optical polish.
Based on the first embodiment, as optional 3rd embodiment, the liquid crystal layer is nematic crystal layer, double frequency
Liquid crystal layer, network polymer liquid crystal layer or ferroelectric liquid crystal layer.
Based on the first embodiment, as optional fourth embodiment, the liquid crystal polarization gratings, comprising: along described
The liquid crystal photo-alignment film and liquid crystal polarization gratings film that normal direction successively fits closely；
The liquid crystal photo-alignment film, is attached on the dielectric film.
Based on the fourth embodiment, as optional 5th embodiment, the outer surface of the top glass substrate and described
At least one of the outer surface of liquid crystal polarization gratings film, is coated with optical anti-reflective film.
Based on the compound liquid-crystal device, as optional sixth embodiment, the surface of the liquid crystal cell incident light and institute
At least one of the surface for stating liquid crystal polarization gratings emergent light, is coated with optical anti-reflective film.
Based on the compound liquid-crystal device or the first embodiment, as optional 7th embodiment, the medium is thin
The transmissivity of film transmission is higher than the first setting value, and the reflectivity of the dielectric film reflection is higher than the second setting value.
The compound liquid-crystal device that the present exemplary embodiment provides, achieve it is following the utility model has the advantages that
1, it since the liquid crystal cell and liquid crystal polarization gratings of adjustable liquid crystal half-wave piece share a glass substrate, is saved in structure
A substrate of glass has been gone, therefore has reduced optical loss, has facilitated the optical loss characteristic for improving entire light deflection；
2, structure is more compact, reduces thickness of detector；
3, dielectric film can prevent the light orientation structure inside adjustable liquid crystal half-wave piece, when manufacturing compound liquid-crystal device
By secondary erasable.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The utility model can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets the utility model
Embodiment, and be used to explain the principles of the present invention together with specification.
Fig. 1 is the structure chart of compound liquid-crystal device in an exemplary embodiment；
Fig. 2 is the working principle diagram of compound liquid-crystal device shown in Fig. 1；
Fig. 3 is the sectional view of compound liquid-crystal device in an exemplary embodiment.
Specific embodiment
The following description and drawings fully show the specific embodiment of the utility model, so that those skilled in the art
Them can be practiced.Embodiment only represents possible variation.Unless explicitly requested, otherwise individual components and functionality is optional
, and the sequence operated can change.The part of some embodiments and feature can be included in or replace other implementations
The part of scheme and feature.The range of the embodiments of the present invention includes the entire scope and right of claims
All obtainable equivalents of claim.Herein, each embodiment can be by individually or generally " practical new with term
Type " indicates that this is not meant to automatic just for the sake of convenient, and if in fact disclose the utility model more than one
The range that ground limits the application is that any single utility model or utility model are conceived.Herein, first and second grades
The relational terms of class are used only for distinguishing one entity or operation from another entity or operation, without requiring or
Imply that there are any actual relationship or sequences between these entities or operation.Moreover, the terms "include", "comprise" or its
Any other variant is intended to non-exclusive inclusion, so that including the process, method or equipment of a series of elements
It include not only those elements, but also including other elements that are not explicitly listed.Each embodiment herein is using progressive
Mode describes, and each embodiment focuses on the differences from other embodiments, identical phase between each embodiment
Like partially may refer to each other.
In one exemplary embodiment, as shown in Figure 1, the compound liquid-crystal device 200 for light beam deflection includes: adjustable liquid
Liquid crystal cell 201, dielectric film 203 and the liquid crystal polarization gratings 202 of brilliant half-wave plate.
The liquid crystal cell 201 of adjustable liquid crystal half-wave piece, for controlling the rotation side of incident circularly polarized light by automatically controlled switching
To.
Liquid crystal polarization gratings 202, it is inclined for being carried out to the circularly polarized light after the liquid crystal cell 201 of adjustable liquid crystal half-wave piece
Turn.
The liquid crystal cell 201 and liquid crystal polarization gratings 202 of adjustable liquid crystal half-wave piece share a glass substrate.
Dielectric film 203 is plated on the surface of the liquid crystal cell 201 of adjustable liquid crystal half-wave piece, and liquid crystal polarization gratings 202 are attached to
On dielectric film 203.
Dielectric film 203 transmits the operation wavelength of compound liquid-crystal device 200, and reflects light orientation exposure wavelength.It can
Choosing, dielectric film 203 is high pass light filter film.Optionally, above-mentioned operation wavelength can be longer wavelengths of near infrared light, on
Stating light orientation exposure wavelength can be the shorter blue violet light of wavelength.
Above-mentioned light orientation exposure wavelength refers to the exposure wave of light orientation material in the manufacturing process of compound liquid-crystal device 200
It is long.
Fig. 2 shows the working principle of the compound liquid-crystal device 200 in the present exemplary embodiment, compound liquid-crystal devices 200
For in automatically controlled scanning means.Become Left-hand circular polarization after the quarter wave plate that linearly polarized light is placed by one with its direction at 45 °
Light after the left circularly polarized light is incident on the liquid crystal cell 201 of adjustable liquid crystal half-wave piece, may be implemented phase based on voltage control and prolong
It is late respectively the automatically controlled switching of 0 and π two states, when phase delay is 0, above-mentioned left circularly polarized light still maintains left-handed circle
Polarized light state, polarization and deflection direction occur for beam direction to the left when continuing to be incident on liquid crystal polarization gratings 202.Work as phase
When delay is π, above-mentioned left circularly polarized light becomes right-circularly polarized light, light beam side when continuing to be incident on liquid crystal polarization gratings 202
To generation polarization and deflect direction to the right.Then, the liquid crystal cell 201 based on adjustable liquid crystal half-wave piece is to incident ray polarized light
The automatically controlled scanning in light beam deflection direction is realized in left-handed and dextrorotation conversion.
Compound liquid-crystal device 200 in the present exemplary embodiment, achieve it is following the utility model has the advantages that
1, it since the liquid crystal cell 201 and liquid crystal polarization gratings 202 of adjustable liquid crystal half-wave piece share a glass substrate, is tying
A substrate of glass is eliminated on structure, therefore reduces optical loss, and the optical loss for helping to improve entire light deflection is special
Sign property；
2, structure is more compact, reduces thickness of detector；
3, dielectric film 203 can prevent the light orientation structure inside adjustable liquid crystal half-wave piece 201, in manufacture compound liquid-crystal
By secondary erasable when device.
In one exemplary embodiment, as shown in figure 3, the compound liquid-crystal device 200 for light beam deflection includes: adjustable liquid
Liquid crystal cell 201, dielectric film 203 and the liquid crystal polarization gratings 202 of brilliant half-wave plate.
The liquid crystal cell 201 of adjustable liquid crystal half-wave piece realizes Polarization Control function, may include: successively tight along normal direction
The top glass substrate 211 of closely connected conjunction, upper conductive film 212, liquid crystal aligning film 213, liquid crystal layer 214, lower liquid crystal aligning film
215, lower conductive film 216 and lower glass substrate 217.
As optional embodiment, upper conductive film 212 and lower conductive film 216 are transparent membrane.
As optional embodiment, two tables vertical with the normal of compound liquid-crystal device 200 of lower glass substrate 217
Face, i.e. lower glass substrate 217 and the lower adjacent surface of conductive film 216 and the surface adjacent with dielectric film 203, can be through
Optical polish processing, to be more suitable for adhering to.
As optional embodiment, liquid crystal layer 214 can be nematic crystal layer, dual-frequency liquid crystal layer, network polymer
Liquid crystal layer or ferroelectric liquid crystal layer.
Liquid crystal polarization gratings 202 realize light beam deflection, may include: the liquid successively fitted closely along normal direction
Brilliant light orientation film 218 and liquid crystal polarization gratings film 219.
Liquid crystal photo-alignment film 218 is attached on dielectric film 203.
Dielectric film 203 is plated on the outer surface of lower glass substrate 217.Work of the dielectric film 203 to compound liquid-crystal device 200
Make wavelength transmission, and light orientation exposure wavelength is reflected.
In view of the special construction of compound liquid-crystal device 200 in the present exemplary embodiment, manufacturing process also has particularity.
When manufacturing the film that liquid crystal polarization gratings 202 include, if the liquid crystal cell 201 of the adjustable liquid crystal half-wave piece as substrate is by light
Alignment agent is made using parallel-oriented mode, then carrying out micro-structure figure in the film for including to liquid crystal polarization gratings 202
When shape exposes, due to the translucency of glass substrate, light orientation that can be produced in the liquid crystal cell 201 to adjustable liquid crystal half-wave piece
Structure damages.Therefore, dielectric film 203 is plated on the outer surface of lower glass substrate 217, is in order to above-mentioned light orientation knot
Structure carries out secondary erasable protection.
Further, as optional embodiment, the transmissivity that dielectric film 203 transmits is higher than the first setting value, medium
The reflectivity of film 203 is higher than the second setting value.What above-mentioned first setting value and the second setting value can be set as usually using
Value also can be set as being higher than the value usually used, so that operating wave of the dielectric film 203 to compound liquid-crystal device 200
It is long that there is high-transmission rate, while there is high reflectance to light orientation exposure wavelength.For example, compound liquid-crystal device 200 is used for light beam
The operation wavelength of electric scanning is 1550 nanometers, and the exposure wavelength of light orientation material is 405 nanometers in manufacturing process, and nanometer medium is thin
Film 203 can have high-transmission rate to 1550 nanometers of wavelength, and have high reflectance to 405 nanometers of wavelength.
As optional embodiment, in the outer surface of top glass substrate 211 and the outer surface of liquid crystal polarization gratings 219
At least one, optical anti-reflective film is coated with, to reduce loss brought by the Fresnel reflection of compound liquid-crystal device surface, to mention
The through performance of high entire compound liquid-crystal device 200.
It may be implemented using the compound liquid-crystal device 200 in the present exemplary embodiment when using 1 with device normal
Direction is that the automatically controlled selection of two mirror image angles of symmetry axis may be implemented 2 when using N number of series connectionNThe automatically controlled choosing of a angle
It selects.
It should be understood that the utility model is not limited to the process and knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (8)
1. a kind of compound liquid-crystal device for light beam deflection characterized by comprising the liquid crystal cell of adjustable liquid crystal half-wave piece,
Liquid crystal polarization gratings and dielectric film；
The liquid crystal cell, for controlling the direction of rotation of incident circularly polarized light by automatically controlled switching；
The liquid crystal polarization gratings, for being deflected to the circularly polarized light after the liquid crystal cell；
The liquid crystal cell and the liquid crystal polarization gratings share a glass substrate；
The dielectric film is plated on the surface of the liquid crystal cell, and the liquid crystal polarization gratings are attached on the dielectric film；
The dielectric film transmits the operation wavelength of the compound liquid-crystal device, and reflects light orientation exposure wavelength.
2. compound liquid-crystal device as described in claim 1, which is characterized in that the liquid crystal cell, comprising: successively along normal direction
The top glass substrate that fits closely, upper conductive film, upper liquid crystal oriented film, liquid crystal layer, lower liquid crystal aligning film, lower conductive thin
Film and lower glass substrate；
The dielectric film is plated on the outer surface of the lower glass substrate.
3. compound liquid-crystal device as claimed in claim 2, which is characterized in that the lower glass substrate is vertical with the normal
Two surfaces, are handled through optical polish.
4. compound liquid-crystal device as claimed in claim 2, which is characterized in that the liquid crystal layer is nematic crystal layer, double frequency
Liquid crystal layer, network polymer liquid crystal layer or ferroelectric liquid crystal layer.
5. compound liquid-crystal device as claimed in claim 2, which is characterized in that the liquid crystal polarization gratings, comprising: along the method
The liquid crystal photo-alignment film and liquid crystal polarization gratings film that line direction successively fits closely；
The liquid crystal photo-alignment film, is attached on the dielectric film.
6. compound liquid-crystal device as claimed in claim 5, which is characterized in that the outer surface of the top glass substrate and described
At least one of the outer surface of liquid crystal polarization gratings film, is coated with optical anti-reflective film.
7. compound liquid-crystal device as described in claim 1, which is characterized in that the surface of the liquid crystal cell incident light and described
At least one of the surface of liquid crystal polarization gratings emergent light, is coated with optical anti-reflective film.
8. compound liquid-crystal device as claimed in claim 1 or 2, which is characterized in that the transmissivity of the dielectric film transmission is high
It is higher than the second setting value in the reflectivity of the first setting value, the dielectric film reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445478.5U CN208737174U (en) | 2018-09-04 | 2018-09-04 | Compound liquid-crystal device for light beam deflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445478.5U CN208737174U (en) | 2018-09-04 | 2018-09-04 | Compound liquid-crystal device for light beam deflection |
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| Publication Number | Publication Date |
|---|---|
| CN208737174U true CN208737174U (en) | 2019-04-12 |
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| CN201821445478.5U Withdrawn - After Issue CN208737174U (en) | 2018-09-04 | 2018-09-04 | Compound liquid-crystal device for light beam deflection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873556A (en) * | 2018-09-04 | 2018-11-23 | 洛伦兹（北京）科技有限公司 | Compound liquid-crystal device for light beam deflection |
| CN110221444A (en) * | 2019-06-06 | 2019-09-10 | 深圳市麓邦技术有限公司 | Imaging system |
| CN110632696A (en) * | 2019-09-20 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | A compact beam deflector and its preparation method |
| CN116300057A (en) * | 2022-12-22 | 2023-06-23 | 湖北华中长江光电科技有限公司 | Light beam deflection device based on liquid crystal and application thereof |
-
2018
- 2018-09-04 CN CN201821445478.5U patent/CN208737174U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873556A (en) * | 2018-09-04 | 2018-11-23 | 洛伦兹（北京）科技有限公司 | Compound liquid-crystal device for light beam deflection |
| CN108873556B (en) * | 2018-09-04 | 2024-09-20 | 洛伦兹（北京）科技有限公司 | Composite liquid crystal device for beam deflection |
| CN110221444A (en) * | 2019-06-06 | 2019-09-10 | 深圳市麓邦技术有限公司 | Imaging system |
| CN110221444B (en) * | 2019-06-06 | 2021-03-26 | 深圳市麓邦技术有限公司 | Imaging system |
| CN110632696A (en) * | 2019-09-20 | 2019-12-31 | 中国科学院长春光学精密机械与物理研究所 | A compact beam deflector and its preparation method |
| CN116300057A (en) * | 2022-12-22 | 2023-06-23 | 湖北华中长江光电科技有限公司 | Light beam deflection device based on liquid crystal and application thereof |
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Granted publication date: 20190412 Effective date of abandoning: 20240920 |
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Granted publication date: 20190412 Effective date of abandoning: 20240920 |