CN203688947U - Multi-level wave plate - Google Patents
Multi-level wave plate Download PDFInfo
- Publication number
- CN203688947U CN203688947U CN201420055593.7U CN201420055593U CN203688947U CN 203688947 U CN203688947 U CN 203688947U CN 201420055593 U CN201420055593 U CN 201420055593U CN 203688947 U CN203688947 U CN 203688947U
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- liquid crystal
- wave plate
- crystal layer
- multistage
- transparency carrier
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Abstract
The utility model provides a multi-level wave plate which comprises evenly numbered liquid crystal wave plates and matching liquid or matching gel which is filled among the liquid crystal wave plates; every two liquid crystal wave plates are mutually attached in an anti-parallel mode. The wide view field multi-level wave plate has the advantages of being insensitive to the incident angle, wide in work view field, free of limitation of size and appearance, capable of adjusting in detail or accurately controlling the phase delay amount and the like. The multi-level wave plate has wide application prospect in optical detection, optical fiber communication, laser technology and other fields.
Description
Technical field
The utility model belongs to optical wave plate technical field, is specifically related to a kind of multistage wave plate.
Background technology
At present, optical wave plate divides there is multistage wave plate (multiple-order wave plate), gummed zero-th order waveplates or claims composite wave plate (compound zero-order wave plate) and true zero-th order waveplates (true zero-order) by structure.Wherein true zero-th order waveplates, the wavelength sensitivity of retardation is low, temperature stability is high, accepts effective angle large, and performance is better than other two kinds of wave plates greatly, but true zero-th order waveplates is often very thin, taking quartz as example, the true zero level quartz wave-plate of wavelength centered by its be about at visible light part double refractive inde ~ 0.0092, one 550nm, its thickness only has 15um, and so thin wave plate all can run into many difficulties in manufacture and use.The thickness of multistage wave plate equals multiple all-wave thickness and adds the thickness of required retardation, relatively easily manufacture, but the shortcoming existing is that it is all very sensitive to wavelength, temperature and incident angle, has limited to a great extent the application of multistage wave plate.Gummed zero-th order waveplates or title composite wave plate are by glued together two multistage wave plates.By the slow axis of the fast axle of a wave plate and another wave plate is aimed to eliminate all-wave optical path difference, only leave required optical path difference.Gummed wave plate can improve the impact of temperature on wave plate to a certain extent, has increased the susceptibility of wave plate retardation to incident angle and wavelength but another result is it.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of multistage wave plate, can reduce the susceptibility to incident angle by multistage wave plate, expands the visual field of multistage wave plate, improves the application potential of multistage wave plate at complex condition.
The multistage wave plate the utility model proposes comprises: the liquid crystal wave plate that quantity is even number and the index-matching fluid of filling between described liquid crystal wave plate or coupling glue; Wherein said liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two, adjacent two liquid crystal wave plates taking the direction perpendicular to logical light face as axle Rotate 180 ° after laminating.
Whether adjustable according to optical delay amount, described liquid crystal wave plate can adopt fixing liquid crystal wave plate or adjustable liquid crystal wave plate.Liquid crystal layer, transparent dottle pin and both sides symmetrically arranged alignment films and transparency carrier successively in the middle of the structure of fixing liquid crystal wave plate comprises.Liquid crystal layer, transparent dottle pin and both sides symmetrically arranged alignment films, nesa coating and transparency carrier successively in the middle of adjustable liquid crystal wave plate structure comprises.
The alignment films of the liquid crystal layer both sides of described every liquid crystal wave plate all takes the antiparallel mode of frictional direction to arrange, the liquid crystal molecule in liquid crystal layer is arranged along face.
The utlity model has following advantage:
1) insensitive to the incident angle of light, receive effective angle can reach ± 20 °, receive effective angle large.Because two liquid crystal cells stack in the contrary mode of tilt angle, can realize the light of different angles incident is carried out to automated optical delay compensation, while being this structure of light process, off-axis effect in first liquid crystal cell is (when Off-axis-light process wave plate, the relative normal incidence of optical delay amount changes to some extent, amount of delay is larger, effective acceptance angle of wave plate is just less) substantially come by second liquid crystal cell compensation, this auto-compensation mechanism has reduced the susceptibility of liquid crystal wave plate to light off-axis angle, thereby can make its effective receiving angle enlarge markedly, referring to Fig. 5.
2) size of wave plate and profile are unrestricted, can as required wave plate be designed to arbitrary shape.
3) the bit phase delay amount of wave plate can accurately be controlled by automatically controlled mode.
The utility model is with a wide range of applications in fields such as optical detection, optical fiber communication, laser technologies.
Brief description of the drawings
Fig. 1 is multistage wave plate structural representation of the present utility model;
Fig. 2 is the structural representation of the fixing liquid crystal wave plate in the utility model;
Fig. 3 A and Fig. 3 B are the transparency carrier of liquid crystal wave plate in the utility model and the frictional direction schematic diagram of interior surface orientations film thereof;
Fig. 4 is the structural representation of the adjustable liquid crystal wave plate in the utility model;
Fig. 5 is the schematic diagram that multistage wave plate of the present utility model increases effective receiving angle;
Fig. 6 is optical system for testing figure;
Fig. 7 is transmitted light spectrogram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
What Fig. 1 showed is the enforcement structure of a kind of multistage wave plate of the present utility model, it comprises 4 fixing liquid crystal wave plates (104,105,106,107), and the index-matching fluid of filling between adjacent interfaces or coupling glue (101,102,103), wherein second and the 4th block of fixing liquid crystal wave plate (105,107) relative first and the 3rd block of fixing liquid crystal wave plate (104,106) with perpendicular to logical light face (108,109) direction is that axle has rotated 180 °, and liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two.
Fig. 2 is the structural representation of fixing liquid crystal wave plate, comprises transparency carrier (201,202), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207.Wherein alignment films (205,206) be coated in respectively on the inside surface of transparency carrier (201,202), after the PROCESS FOR TREATMENT such as overbaking, friction, liquid crystal molecule in can induced liquid crystal layer 207 is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal.Liquid crystal layer 207 is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, transparency carrier (201,202) by transparent dottle pin (203,204) support, for accurately controlling the thickness of liquid crystal layer 207, make its refractive indices
nbetween 0.05 ~ 0.50.Transparent dottle pin (203,204) can adopt glass fibre, also can adopt glass microballoon or plastics microballon.
Fig. 3 is fixing two transparency carriers (201,202) of liquid crystal wave plate and the frictional direction schematic diagram of interior surface orientations film (205,206) thereof.Alignment films (205,206) be coated on transparency carrier (201,202) inside surface, at transparency carrier (201,202) when fitting into liquid crystal cell, black triangle mark (301,302) on it is overlapped, and (black triangle is contraposition mark when transparency carrier (201,202) is fitted, prevent wrong laminating direction), that is transparency carrier (201,202) is fitted in the antiparallel mode of frictional direction of alignment films (205,206).
Fig. 4 is the structural representation that adopts adjustable liquid crystal wave plate, comprises transparency carrier (201,202), nesa coating (401,402), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207.Can accurately control the optical phase put-off of the multistage wave plate in wide visual field of the present utility model by adjusting the method for birefringence rate variance of liquid crystal material, wherein a kind of by way of being to utilize the electro-optic birefringent effect of liquid crystal material to realize.First, at transparency carrier (201,202) upper plating nesa coating (401,402), then coated with orientation film (205,206) thereon.Nesa coating (401,402) is generally indium tin oxide target ITO, and its square resistance is 80 ~ 500 Ω/.Utilize electrode to apply the voltage of certain amplitude at nesa coating (401,402), can be liquid crystal layer (207) electric field along optical direction is provided, the sensing of liquid crystal molecule is rotated, thereby change the optics bit phase delay of liquid crystal wave plate.Because the size of electric field can meticulously be controlled, therefore the optical phase put-off of the multistage wave plate in wide visual field of the present utility model can regulate meticulously and accurately control.
An embodiment of the present utility model uses 4 identical liquid crystal wave plates (104,105,106,107), and allow liquid crystal wave plate (105,107) relatively liquid crystal wave plate (104,106) with perpendicular to logical light face (108,109) direction is axle Rotate 180 °, forms the multistage wave plate in wide visual field of the present utility model.The thickness of liquid crystal layer of liquid crystal wave plate used is 10 um, Δ
n=0.251589nm
,25 DEG C.In the time of 25 DEG C of environment temperatures, using wavelength is that the continuous wave laser of 532 nm is measured bit phase delay under different angles, and measurement result shows, this multistage wave plate is within the scope of-5 ° ~+5 ° time in incident angle, and the variation of retardation can be ignored.
The susceptibility of another embodiment of the present utility model in order to prove that the optical delay amount of liquid crystal wave plate group of the present utility model changes the angle of incident light: when use optical system for testing test light as shown in Figure 6 changes incident angle between-20 °～+ 20 °, liquid crystal wave plate retardation is with the variation of incident angle.
Light source passes through successively by the polarizer, liquid crystal wave plate and analyzer after collimation lens accurate 1 is straight, then be collimated lens 2 receptions and enter spectrometer system, can accurately control by turntable the incident angle of the relative liquid crystal wave plate of incident light, here taking 4 ° as step-length, between-20 °～+ 20 °, change incident angle, obtain the transmitted spectrum under different angles, as shown in Figure 7.Can find out, change incident angle between-20 °～+ 20 ° time, transmitted spectrum changes hardly.Taking the transmission peaks at 532nm place as example, change incident angle between-20 °～+ 20 ° time, wavelength maximum offset corresponding to transmission peaks is only about 1nm, and it is very insensitive that the optical delay amount of visible liquid crystal wave plate group changes the angle of incident light.
Above embodiment be multistage wave plate taking 4 liquid crystal wave plates composition as example, in actual applications, also can adopt as required the liquid crystal wave plate of other even number amount, as 6,8,10 etc.
Simultaneously; above embodiment is only non-limiting in order to the technical solution of the utility model to be described; those skilled in the art are to be understood that; under the aim and scope prerequisite that do not depart from the technical solution of the utility model; amendment to the technical solution of the utility model and be equal to replacement, within also all should being encompassed in the protection domain of claim of the present utility model.
Claims (6)
1. a multistage wave plate, is characterized in that, comprising: the liquid crystal wave plate that quantity is even number and the index-matching fluid of filling between described liquid crystal wave plate or coupling glue; Wherein said liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two, adjacent two liquid crystal wave plates taking the direction perpendicular to logical light face as axle Rotate 180 ° after laminating.
2. multistage wave plate according to claim 1, it is characterized in that, described liquid crystal wave plate is fixing liquid crystal wave plate, be that optical delay amount is non-adjustable, comprise transparency carrier (201,202), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207, wherein alignment films (205,206) is coated in respectively on the inside surface of transparency carrier (201,202), liquid crystal molecule in induced liquid crystal layer (207) is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal; Described liquid crystal layer (207) is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, and transparency carrier (201,202) is supported by transparent dottle pin (203,204), for accurately controlling the thickness of liquid crystal layer (207).
3. multistage wave plate according to claim 1, it is characterized in that, described liquid crystal wave plate is adjustable liquid crystal wave plate, be that optical delay amount is adjustable, it comprises transparency carrier (201,202), nesa coating (401,402), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer (207); Described transparency carrier (201,202) inside surface is coated with nesa coating (401,402), for changing the optics bit phase delay of liquid crystal wave plate; On nesa coating (401,402), be coated with alignment films (205,206), the liquid crystal molecule in induced liquid crystal layer (207) is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal; Described liquid crystal layer (207) is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, and transparency carrier (201,202) is supported by transparent dottle pin (203,204), for accurately controlling the thickness of liquid crystal layer (207).
4. according to the multistage wave plate described in claim 2 or 3, it is characterized in that, the alignment film rubbing direction of described liquid crystal layer (207) both sides is antiparallel, and the liquid crystal molecule in liquid crystal layer is arranged along face.
5. according to the multistage wave plate described in claim 2 or 3, it is characterized in that, the thickness of described liquid crystal layer (207) is controlled by transparent dottle pin, refractive indices
nbetween 0.05 ~ 0.50.
6. according to the multistage wave plate described in claim 2 or 3, it is characterized in that, liquid crystal layer (207) thickness is 10 um, Δ
n=0.152.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055593.7U CN203688947U (en) | 2013-10-28 | 2014-01-28 | Multi-level wave plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310516524 | 2013-10-28 | ||
| CN201310516524.1 | 2013-10-28 | ||
| CN201420055593.7U CN203688947U (en) | 2013-10-28 | 2014-01-28 | Multi-level wave plate |
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| CN203688947U true CN203688947U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410042006.5A Expired - Fee Related CN103792731B (en) | 2013-10-28 | 2014-01-28 | A kind of multistage wave plate of wide visual field |
| CN201420055593.7U Expired - Fee Related CN203688947U (en) | 2013-10-28 | 2014-01-28 | Multi-level wave plate |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410042006.5A Expired - Fee Related CN103792731B (en) | 2013-10-28 | 2014-01-28 | A kind of multistage wave plate of wide visual field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792731A (en) * | 2013-10-28 | 2014-05-14 | 中国工程物理研究院流体物理研究所 | Wide view field multistage wave plate |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154389A (en) * | 2016-08-31 | 2016-11-23 | 武汉优光科技有限责任公司 | A kind of wide-angle phase delay device |
| US11215881B2 (en) * | 2019-03-27 | 2022-01-04 | Facebook Technologies, Llc | Switchable broadband waveplate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2255193B (en) * | 1991-04-24 | 1994-10-12 | Marconi Gec Ltd | Optical device |
| CN101915953A (en) * | 2010-08-13 | 2010-12-15 | 四川大学 | Wideband quarter wave plate |
| CN103353696B (en) * | 2013-06-18 | 2016-06-29 | 江苏和成显示科技股份有限公司 | Wide viewing angle wave plate and application thereof |
| CN103792731B (en) * | 2013-10-28 | 2016-08-24 | 中国工程物理研究院流体物理研究所 | A kind of multistage wave plate of wide visual field |
-
2014
- 2014-01-28 CN CN201410042006.5A patent/CN103792731B/en not_active Expired - Fee Related
- 2014-01-28 CN CN201420055593.7U patent/CN203688947U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792731A (en) * | 2013-10-28 | 2014-05-14 | 中国工程物理研究院流体物理研究所 | Wide view field multistage wave plate |
| CN103792731B (en) * | 2013-10-28 | 2016-08-24 | 中国工程物理研究院流体物理研究所 | A kind of multistage wave plate of wide visual field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103792731A (en) | 2014-05-14 |
| CN103792731B (en) | 2016-08-24 |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20190128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |