CN101782690A - Unit extraordinary refraction rochon prism and extraordinary refraction polarized beam splitting method - Google Patents
Unit extraordinary refraction rochon prism and extraordinary refraction polarized beam splitting method Download PDFInfo
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- CN101782690A CN101782690A CN 201010110065 CN201010110065A CN101782690A CN 101782690 A CN101782690 A CN 101782690A CN 201010110065 CN201010110065 CN 201010110065 CN 201010110065 A CN201010110065 A CN 201010110065A CN 101782690 A CN101782690 A CN 101782690A
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Abstract
The invention relates to a unit extraordinary refraction rochon prism, comprising a single cuboid made of iceland crystals. A value of a crystal optic axial angle alpha can be selected in the range of 46.6 degrees to 46.3 degrees according to using wavelength. The range of applicable wavelength of the prism is from 300 nm to 1800 nm, and an extinction ratio excels 10 to 5. The extraordinary refraction polarized beam splitting method comprises the steps of: shooting beams into a unit uniaxial birefringent crystal prism, enabling o light to directly pass through the crystal prism, and keeping the o light in the same direction with the refraction beams after emergence; performing total reflection of e light with extraordinary refraction in an incident end face in the internal surface of the crystal prism, and performing extraordinary reflection again when reaching an emergence end face; and generating a beam splitting angle after the emergence of the two beams of light in the emergence end face. The invention is the polarizing beam splitting method and the unit extraordinary refraction rochon prism with higher technical index and the realization of multiple functions. The characteristic of beam splitting of the prism indicate the prism has multiple functions of polarized beam splitting, adjustable beam splitting angles with incidence angles, polarization and analysis. The invention has very important practical significance in the application technical fields such as laser technology, optical test, optical modulation, and the like.
Description
Technical field
The invention discloses a kind of directly transmission of ordinary light (o light) in the single axial birefringence crystal prism, non-ordinary light (e light) belongs to field of optical device technology through the unusual refraction polarized beam splitting prism of the polarized beam splitting method of the refraction of very refraction-total reflection-very and cellular construction.
Background technology
Polarizing device is the important devices in laser technology and the polarisation applied technical field, and polarizing-splitting prism is an important class of polarizing device.Its research and development are significant to the development of Modern Optics Technology such as optical communication, optical information processing, optic test, laser technology and photometry calculation.Before the present invention makes, the polynary design of the normal employing of common polarizing device, optic damage threshold value is lower, and cementing layer under certain conditions can be influential to the structure and the performance of device, and the function of device is also more single, brings inconvenience for experiment and application.
The developing of the development of laser and optical modulation application technology and new application, polarizing-splitting prism has been proposed some new requirements: (1) requirement reduces in design, the process device beam splitting, bias influential method of energy and step as far as possible, and make prism have the extinction ratio of bigger splitting angle and Geng Gao as far as possible, to adapt to the needs that hi-tech and precision measurement are used.(2) require device to have more function as far as possible, be beneficial to the simplification of instrument and equipment and experimental provision and the multiple use of miniaturization and single device, thereby improve its reliability and cost performance.
Polarizing-splitting prism commonly used at present mainly contains wollaston prism, two wollaston prism, Rochon prism, beam splitting Glan Thompson prism and savart plate etc., the design of these devices mostly is polynary crystal structure and uses adhesive to combine, the key technical indexes such as the device beam splitting performance of this structure, extinction ratio, transmittance are better, but optic damage threshold value is lower and the temperature stabilization performance of structure is relatively poor, and fewer cells structure Design general utility functions are single, and it is poor to produce less lateral shear as savart plate.Therefore developing a kind of simple cellular construction that both had, to guarantee having higher performance index and integrally-built temperature stability, can produce the polarized beam splitting device of big splitting angle again, is very necessary to satisfy the modern development in science and technology needs.
Summary of the invention
The invention provides a kind of directly transmission of ordinary light (o light) in the single axial birefringence crystal prism, non-ordinary light (e light) is through the polarized beam splitting method of the refraction of very refraction-total reflection-very and a kind ofly have a superior performance index, utilizes unit crystal prism structure to realize that the unit of similar Rochon prism beam splitting effect reflects Rochon prism very much.
Polarized beam splitting method of the present invention, its mechanism are that light is propagated in the uniaxial anisotropy crystal prism, are divided into the orthogonal linearly polarized light of two bundle direction of vibration, often claim o light and e light; O light is directly through the outgoing of outgoing end face; Very refraction takes place at incident end face in e light, and total reflection takes place in the side that reaches crystal prism, then reflects very much outgoing at a certain angle once more at the outgoing end face, thereby o, e light produce certain splitting angle.Because the process of polarization beam splitting is finished by unit crystal structure prism, is not subjected to the influence of cementing layer, this is polarized beam splitting method transmittance of the present invention, extinction ratio and the high reason of optic damage threshold value.
This programme is realized by following technical measures: a kind of unit reflects Rochon prism very much, it is characterized in that it makes the single axial birefringence crystal prism of monolithic rectangular structure lateral arrangement by the icelandspar crystal, and the length aperture of prism is than (L/A) 8～10; The incident end face of described single axial birefringence crystal prism, outgoing end face and reflecting interface polishing; Optical axis of crystal angle α
o(angle of the optical axis of crystal and rectangular coordinate system x axle) span is 46.6 °～46.3 °, and beam incident angle is-3 °～3 °, the wavelength coverage 300nm～1800nm that is suitable for; The splitting angle scope of correspondence is 23.94 °～18.46 ° during light beam normal incidence; The splitting angle scope of correspondence was 12.51 °～30.14 ° when beam incident angle was-3 °～3 °.
The concrete characteristics of this scheme also have, optical axis of crystal angle α
o46.6 ° of values, light beam normal incidence and suitable wavelength coverage 300nm～351nm, corresponding splitting angle scope is 23.94 °～22.44 °.
Optical axis of crystal angle α
o46.5 ° of values, light beam normal incidence and suitable wavelength coverage 352nm～482nm, corresponding splitting angle scope is 22.41 °～20.63 °.
Optical axis of crystal angle α
o46.4 ° of values, light beam normal incidence and suitable wavelength coverage 483nm～1172nm, corresponding splitting angle scope is 20.62 °～18.91 °.
Optical axis of crystal angle α
o46.3 ° of values, light beam normal incidence and suitable wavelength coverage 1173nm～1800nm, corresponding splitting angle scope is 18.90 °～18.46 °.
Optical axis of crystal angle α
oOptimize 46.42 ° of values, the wavelength coverage 300nm～1800nm that is suitable for, beam incident angle scope-3 °～3 °, corresponding splitting angle variation range is 12.35 °～12.19 °.
A kind of very refraction polarized beam splitting method is characterized in that light beam is injected the unit with-3 °～3 ° incident angle scope reflects Rochon prism very much;
Described unit reflects Rochon prism and makes the single axial birefringence crystal prism of monolithic rectangular structure lateral arrangement by the icelandspar crystal very much, and the length aperture of prism is than (L/A) 8～10; The incident end face of described single axial birefringence crystal prism, outgoing end face and reflecting interface polishing; Optical axis of crystal angle α
o(angle of the optical axis of crystal and rectangular coordinate system x axle) span is 46.6 °～46.3 °;
O light is directly by the single axial birefringence crystal prism, and maintenance and incident beam are in the same way after the outgoing; A total reflection takes place at single axial birefringence crystal prism inside surface in the e light that very refraction takes place at incident end face, arrives the outgoing end face once more through very refraction, will produce splitting angle with the o light of outgoing after the outgoing.
Below introduce in detail invention and constitute: a kind of unit reflects the monolithic rectangular parallelepiped that Rochon prism made by the icelandspar crystal and constitutes very much, and the length aperture that its feature one is a prism is than (L/A) 8～10; The incident end face that its feature two is single axial birefringence crystal prism, outgoing end face and reflecting interface polishing; Its feature three is optical axis of crystal angle α
oValue be: (1) if prism is used in single wavelength or little spectral range, and light positive incident obtains the α of maximum splitting angle
oValue sees attached list 1; (2) if prism is used in big spectral range, α
oOptimize 46.42 ° of values.
A kind of very refraction polarized beam splitting method is characterized in that light beam is injected the unit with-3 °～3 ° angular ranges reflects Rochon prism very much; The direct transmission of o light, e light is through very refraction-total reflection-very process outgoing of refraction, and two-beam will produce splitting angle after the outgoing of outgoing end face.
When the present invention worked, light beam can normal incidence, also can be-3 °～3 ° scope oblique incidences, and the direct transmission of o light, and maintenance and incident light are in the same way; Very refraction takes place at incident end face in e light, and total reflection can take place in the side that reaches crystal prism, then reflects very much outgoing at a certain angle once more at the outgoing end face, thereby o, e light produce certain splitting angle.The use spectral range 300nm～1800nm of prism.
The technique effect of the polarizing-splitting prism among the present invention is: the very refracting characteristic that has 1. utilized e light in the single axial birefringence crystal, finished partially and the dispersing of o, e light at incident end face, finish the total reflection of e light in the side, finish the generation of o, the big splitting angle of e light at the outgoing end face, thereby realized that rising of device is inclined to one side and divided beam function.What 2. adopt is unit crystal structure design, than previous binary or triple combination prisms such as Rochon prism, has avoided the influence of cementing layer to polarisation of light beam splitting process; Owing to there is not cementing layer, the use spectral range of prism directly depends on the clear area of o in the icelandspar crystal, e light, and promptly 300nm～1800nm than binary or triple combination prism, uses spectrum to be extended to 300nm by 350nm ultraviolet; Owing to be the unit crystal structure, improved the optic damage threshold value of device, structure is also more firm.3. the similar Romania and Hungary of polarization beam splitting effect prism, i.e. the o light of outgoing is parallel with the incident light direction all the time, and only the e light deflection produces splitting angle; When the range of incident angle at-3 °～3 °, splitting angle can change continuously in the scope greater than 12 °.The unit reflects very that Rochon prism has polarization beam splitting, splitting angle is adjustable, rises partially and the feature of the multiple function integration of analyzing obviously.The present invention is the very refracting characteristic according to e light in the birefringece crystal, a kind of brand-new polarized beam splitting device of development and design, the similar Rochon prism of its beam splitting effect, still be referred to as to reflect very much Rochon prism.Unique beam-splitting method can obtain the splitting angle greater than 20 °, is 2～3 times of the Rochon prism splitting angle that can produce.Characteristics of the present invention are unit crystal structure prisms, one-piece construction is firm, the optic damage threshold value height, splitting angle is big and adjustable, have polarization beam splitting, rise partially and the analyzing multi-functional, practical, these all are its key characters that is better than existing polarization beam splitter prism, make the application of such device more extensive, be applicable to that polarization beam splitting reaches, the scientific experiment of analyzing and utility unit than existing device; Have high technical feature and reliability, this has very important meaning in applications such as laser technology, optic test, optical modulation.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention; Polarization beam splitting light path synoptic diagram when accompanying drawing 2 is normal incidence; Polarization beam splitting light path synoptic diagram when accompanying drawing 3 is oblique incidence.
Embodiment
Embodiment 1
To reflect very much Rochon prism be the single axial birefringence crystal prism of being made monolithic rectangular structure lateral arrangement by the icelandspar crystal in the unit as shown in Figure 1, the incident interface of described single axial birefringence crystal prism, outgoing interface and reflecting interface polishing; Optical axis of crystal angle α
oSpan is 46.6 °, and light beam wavelength value 300nm, the splitting angle of light beam normal incidence are 23.94 °.
As Fig. 2, shown in Figure 3, a kind of very refraction polarized beam splitting method is injected the unit with light beam with one 3 °～3 ° incident angle scopes and is reflected very much Rochon prism; Described unit reflects Rochon prism and makes the single axial birefringence crystal prism of monolithic rectangular structure lateral arrangement by the icelandspar crystal very much, and the length aperture of prism is than (L/A) 8～10; The incident end face of described single axial birefringence crystal prism, outgoing end face and reflecting interface polishing, optical axis of crystal angle α
oSpan is 46.6～46.3 °; O light is directly by the single axial birefringence crystal prism, and maintenance and incident beam are in the same way after the outgoing; A total reflection takes place at single axial birefringence crystal prism inside surface in the e light that very refraction takes place at incident end face, arrives the outgoing end face once more through reflecting very much outgoing at a certain angle, thereby o, e light produce certain splitting angle.Prism material is the icelandspar crystal of optical grade; α among the figure
oBe called optical angle (being the angle of the optical axis of crystal and rectangular coordinate system x axle), if prism is used in single wavelength or little spectral range, and light positive incident, obtain maximum splitting angle φ
Maxα
oValue sees attached list 1; If prism is used in big spectral range, α
oGet 46.42 °.
Polarization beam splitting light path synoptic diagram when accompanying drawing 2 is normal incidence.When light beam normal incidence, the obtainable maximum splitting angle of different wave length sees attached list 1.
Subordinate list 1. normal incidences obtain maximum splitting angle
Optical angle α
oWith the wavelength X corresponding tables
Polarized beam splitting light path synoptic diagram when accompanying drawing 3 is oblique incidence.For α
oGet 46.42 ° prism, when the incident angle of light range, see attached list 2 in the adjustable extent of 300nm～1800nm splitting angle at-3 °～3 °.
Splitting angle when subordinate list 2 incident angle i are respectively 3 ° ,-3 °
With the wavelength X corresponding tables
Embodiment 2
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.5 ° of values, light beam wavelength value 410nm, the splitting angle of light beam normal incidence are 21.39 °.
Embodiment 3
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.4 ° of values, light beam wavelength value 650nm, the splitting angle of light beam normal incidence are 19.74 °.
Embodiment 4
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.4 ° of values, light beam wavelength value 880nm, the splitting angle of light beam normal incidence are 19.23 °.
Embodiment 5
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.4 ° of values, light beam wavelength value 1060nm, the splitting angle of light beam normal incidence are 19.01 °.
Embodiment 6
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.3 ° of values, light beam wavelength value 1300nm, the splitting angle of light beam normal incidence are 18.80 °.
Embodiment 7
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.3 ° of values, light beam wavelength value 1540nm, the splitting angle of light beam normal incidence are 18.63 °.
Embodiment 8
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.3 ° of values, light beam wavelength value 1800nm, the splitting angle of light beam normal incidence are 18.46 °.
Embodiment 9
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 300nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 17.79 °～30.14 °.
Embodiment 10
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 390nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 15.57 °～27.85 °.
Embodiment 11
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 650nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 13.65 °～25.88 °.
Embodiment 12
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 880nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 13.14 °～25.35 °.
Embodiment 13
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 1060nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 12.93 °～25.13 °.
Embodiment 14
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 1300nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 12.72 °～24.92 °.
Embodiment 15
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 1540nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 12.55 °～24.75 °.
Embodiment 16
Present embodiment and embodiment 1 something in common repeat no more, and difference is optical axis of crystal angle α
o46.42 ° of values, light beam wavelength value 1800nm, 3 °～-3 ° of beam incident angle values, corresponding splitting angle
Scope be 12.38 °～24.57 °.
Claims (7)
1. a unit reflects Rochon prism very much, it is characterized in that it makes the single axial birefringence crystal prism of monolithic rectangular structure lateral arrangement by the icelandspar crystal, and the length aperture of prism is than 8～10; The incident end face of described single axial birefringence crystal prism, outgoing end face and reflecting interface polishing; Optical axis of crystal angle α
oSpan is 46.6 °～46.3 °, and beam incident angle is-3 °～3 °, the wavelength coverage 300nm～1800nm that is suitable for.
2. unit according to claim 1 reflects Rochon prism very much, it is characterized in that optical axis of crystal angle α
o46.6 ° of values, light beam normal incidence and suitable wavelength coverage 300nm～351nm.
3. unit according to claim 1 reflects Rochon prism very much, it is characterized in that optical axis of crystal angle α
o46.5 ° of values, light beam normal incidence and suitable wavelength coverage 352nm～482nm.
4. unit according to claim 1 reflects Rochon prism very much, it is characterized in that optical axis of crystal angle α
o46.4 ° of values, light beam normal incidence and suitable wavelength coverage 483nm～1172nm.
5. unit according to claim 1 reflects Rochon prism very much, it is characterized in that optical axis of crystal angle α
o46.3 ° of values, light beam normal incidence and suitable wavelength coverage 1173nm～1800nm.
6. unit according to claim 1 reflects Rochon prism very much, it is characterized in that optical axis of crystal angle α
oOptimize 46.42 ° of values, beam incident angle scope-3 °～3 ° and the wavelength coverage 300nm～1800nm that is suitable for.
7. a unusual refraction polarized beam splitting method is characterized in that light beam is injected the unit with-3 °～3 ° incident angle scope reflects Rochon prism very much;
Described unit reflects Rochon prism and makes the single axial birefringence crystal prism of monolithic rectangular structure lateral arrangement by the icelandspar crystal very much, and the length aperture of prism is than 8～10; The incident end face of described single axial birefringence crystal prism, outgoing end face and reflecting interface polishing; Optical axis of crystal angle α
oSpan is 46.6 °～46.3 °;
O light is directly by the single axial birefringence crystal prism, and maintenance and incident beam are in the same way after the outgoing; A total reflection takes place at single axial birefringence crystal prism inside surface in the e light that very refraction takes place at incident end face, arrives the outgoing end face once more through very refraction, will produce splitting angle with the o light of outgoing after the outgoing.
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| CN 201010110065 CN101782690B (en) | 2010-02-20 | 2010-02-20 | Polarized beam splitting prism and method |
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| CN 201010110065 CN101782690B (en) | 2010-02-20 | 2010-02-20 | Polarized beam splitting prism and method |
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| CN101782690B CN101782690B (en) | 2011-07-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073143A (en) * | 2010-12-10 | 2011-05-25 | 福州高意光学有限公司 | Crystal polarizing, combining and splitting device |
| CN103293586A (en) * | 2013-06-13 | 2013-09-11 | 曲阜师范大学 | Negative refraction single-element polarization beam-splitting prism and polarization beam-splitting method |
| CN107085311A (en) * | 2017-06-06 | 2017-08-22 | 曲阜师范大学 | One kind turns to symmetric splitting ahrens prism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155006A (en) * | 1986-12-19 | 1988-06-28 | Fujitsu Ltd | Polarizing element |
| US20030035112A1 (en) * | 2001-08-20 | 2003-02-20 | Nevis Elizabeth A. | Birefringent beam combiners for polarized beams in interferometers |
| CN1700057A (en) * | 2005-04-27 | 2005-11-23 | 南京大学 | Polarization beam splitting method and apparatus |
| CN101556185A (en) * | 2009-04-15 | 2009-10-14 | 中国科学院上海光学精密机械研究所 | Double frequency shift laser doppler vibration measuring device |
-
2010
- 2010-02-20 CN CN 201010110065 patent/CN101782690B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155006A (en) * | 1986-12-19 | 1988-06-28 | Fujitsu Ltd | Polarizing element |
| US20030035112A1 (en) * | 2001-08-20 | 2003-02-20 | Nevis Elizabeth A. | Birefringent beam combiners for polarized beams in interferometers |
| CN1700057A (en) * | 2005-04-27 | 2005-11-23 | 南京大学 | Polarization beam splitting method and apparatus |
| CN101556185A (en) * | 2009-04-15 | 2009-10-14 | 中国科学院上海光学精密机械研究所 | Double frequency shift laser doppler vibration measuring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073143A (en) * | 2010-12-10 | 2011-05-25 | 福州高意光学有限公司 | Crystal polarizing, combining and splitting device |
| CN103293586A (en) * | 2013-06-13 | 2013-09-11 | 曲阜师范大学 | Negative refraction single-element polarization beam-splitting prism and polarization beam-splitting method |
| CN107085311A (en) * | 2017-06-06 | 2017-08-22 | 曲阜师范大学 | One kind turns to symmetric splitting ahrens prism |
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| CN101782690B (en) | 2011-07-20 |
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