CN202362527U - Adjustable broadband wave plate - Google Patents
Adjustable broadband wave plate Download PDFInfo
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- CN202362527U CN202362527U CN2011204547866U CN201120454786U CN202362527U CN 202362527 U CN202362527 U CN 202362527U CN 2011204547866 U CN2011204547866 U CN 2011204547866U CN 201120454786 U CN201120454786 U CN 201120454786U CN 202362527 U CN202362527 U CN 202362527U
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- adjustable
- wave plate
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Abstract
The utility model relates to a wave plate of an optical device, in particular to an adjustable broadband wave plate, which consists of two birefringent flat plates. The optical axis of each crystal lies in a light pass surface. An included angle alpha is formed between two optical axes. An included angle beta is formed between the two flat plates. The goal of adjusting broadband achromatism is achieved by changing alpha or beta through support control. Used materials are different kinds of birefringent crystals. The refractive indexes of the two kinds of materials satisfy achromatism phase matching, the adjustable retardation range is ranged from 0 degree to 360 degrees, the broadband is rotatably adjustable, the structure is simple, the adjustable broadband wave plate is convenient to operate and the mass production is easy to realize.
Description
Technical field
The utility model patent relates to the optical element field, especially a kind of adjustable wide-band wave plate.
Background technology
Wave plate is a kind of phase delay device of often using in the polarization light path, mainly is used for changing the polarization state of incident wave.Under normal conditions, wave plate designs to a wavelength, but in laser system, optical communication device and optical tests measurement instrument, the polarized systems of consumption such as digital camera industry, a plurality of wavelength of the normal use of polarization light path.For making light path keep optimum condition, often need select the wave plate of respective wavelength for use according to the different working wavelength.This not only makes the polarization light path become complicated; And common wave plate can only satisfy a wavelength requirement; Therefore occurred the synthetic achromatic waveplate of quartz crystal and magnesium fluoride crystal optical axis orthogonal sets on the market, the bandwidth of this type wave plate is very wide, and phase delay is insensitive to wavelength change.
In laser system, optical communication device and optical tests measurement instrument in the polarized systems of consumption such as digital camera industry, need use a plurality of wavelength in the polarization light path simultaneously.What generally adopt is Babinet compensator and Suo Lier-Babinet phase compensator; But they can only once use a wavelength, and the adjustable rope rel in traditional broadband-Babinet phase compensator can realize that the broadband is adjustable; But structure is very complicated, and cost is also than higher.
The utility model combines above application demand, has invented a kind of adjustable wide-band wave plate.
Summary of the invention
The utility model has increased and has treated adjustability with leniency on existing achromatic waveplate basis, and it is adjustable in whole design wavelength, can to realize treating achromatism with leniency, and it is high to postpone precision, easy to operate.
Suo Lier-Babinet compensator complex structure involves great expense, and the utility model is different from Suo Lier-Babinet compensator and patent, has simple in structurely, and cost is cheap, is easy to produce in batches.
A kind of adjustable wide-band wave plate; Be made up of two birefringent material plain films, the optical axis of every crystal lies in the logical light face, and the angle of two optical axises is α; Two plain film angles are β; The angle of said two birefringent material plain film optical axises is adjustable through the support rotation, and the angle β of said two birefringent material plain films is adjustable through support control, and said two birefringent materials adopt the mode of air-gap dress support to connect.
Description of drawings
Fig. 1 is existing achromatic waveplate structure
Fig. 2 is a kind of adjustable wide-band wave plate structure of the present invention
Fig. 3 is a kind of adjustable wide-band wave plate structure of the present invention
Specific embodiment
Figure (1) is existing achromatic waveplate; Two optical axises are vertical; Be combined into the zero level achromatic waveplate; If the two-fold rate of two crystal is respectively: ne, no, Ne, No, thickness are respectively T1 and T2, total retardation is
:
Figure (2) and figure (3) are a kind of adjustable wide-band wave plate structure of the present invention; 1 is quartz crystal, and 2 is magnesium fluoride crystal, and 1 and 2 utilize groups of holders to dress up air-gap; And two crystal can be reconciled the angle β between optical axis included angle α and two plain films respectively; Special circumstances when parallel and optical axis is vertical when two plain films, have just become achromatic waveplate existing as figure (1).Reconcile the retardation of broadband achromatic waveplate through reconciling α or β, simple to operate, cost is low, is easy to produce in batches.
Design concept: optical axis is parallel with logical optical surface:
1.. when light impinged perpendicularly on the wave plate surface, the refractive index of e light and o light was
and
; When incident angle becomes
, the refractive index of extraordinary ray
need according to:
2.. change in optical path length;
3.. when two crystal optical axises became the α angle to change, combination back retardation changed;
Utilize regulate the phase-delay quantity that support changes wave plate at top 3, utilize the refraction of quartz crystal and magnesium fluoride crystal
Rate satisfies the achromatism phase matching, and adjusting angle reaches the adjustable achromatic waveplate in broadband.
The wavelengthtunable of a kind of adjustable wide-band wave plate of the present invention is in whole scope of design, and the adjustable delay amount is 0-360 °, and it is good to postpone precision, and bandwidth surpasses 200nm and postpones precision can be up to λ/500.
Claims (3)
1. adjustable wide-band wave plate; Be made up of two birefringent material plain films, the optical axis of every crystal lies in the logical light face, and the angle of two optical axises is α; Two plain film angles are β, it is characterized in that: the angle of said two birefringent material plain film optical axises is adjustable through the support rotation.
2. adjustable wide-band wave plate according to claim 1 is characterized in that: the angle β of said two birefringent material plain films is adjustable through support control.
3. adjustable wide-band wave plate according to claim 1 is characterized in that: said two birefringent materials adopt the mode of air-gap dress support to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204547866U CN202362527U (en) | 2011-11-17 | 2011-11-17 | Adjustable broadband wave plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204547866U CN202362527U (en) | 2011-11-17 | 2011-11-17 | Adjustable broadband wave plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362527U true CN202362527U (en) | 2012-08-01 |
Family
ID=46573704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204547866U Expired - Fee Related CN202362527U (en) | 2011-11-17 | 2011-11-17 | Adjustable broadband wave plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005153A (en) * | 2015-07-29 | 2015-10-28 | 南京航空航天大学 | Achromatic pupil filter suitable for wide band vector light field |
| CN112099126A (en) * | 2020-10-13 | 2020-12-18 | 福建福晶科技股份有限公司 | 600-once-used 2700nm waveband achromatic half-wave plate |
-
2011
- 2011-11-17 CN CN2011204547866U patent/CN202362527U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005153A (en) * | 2015-07-29 | 2015-10-28 | 南京航空航天大学 | Achromatic pupil filter suitable for wide band vector light field |
| CN112099126A (en) * | 2020-10-13 | 2020-12-18 | 福建福晶科技股份有限公司 | 600-once-used 2700nm waveband achromatic half-wave plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20120801 Termination date: 20151117 |