CN107167927A - 45 ° of polarization beam splitter prisms that a kind of glass is combined with Iceland spar - Google Patents
45 ° of polarization beam splitter prisms that a kind of glass is combined with Iceland spar Download PDFInfo
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- CN107167927A CN107167927A CN201710339159.XA CN201710339159A CN107167927A CN 107167927 A CN107167927 A CN 107167927A CN 201710339159 A CN201710339159 A CN 201710339159A CN 107167927 A CN107167927 A CN 107167927A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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Abstract
The invention belongs to the structure design of optical element and material selection field, the polarization beam splitter prism that more particularly to a kind of glass is combined with Iceland spar.This method is combined using glass with Iceland spar, it have devised a kind of dual output polarization beam splitter prism, the combined prism beam splitting ability and 45 beam splitting Glan Thompson prisms of identical structure angle are essentially identical, the design can save calcite crystal material, reduce prism cost of manufacture, the combined prism can be used reversely, have polarization beam splitting function when reversely using.
Description
Technical field
The invention belongs to the structure design of optical element and material selection field, more particularly to a kind of glass and Iceland spar group
The polarization beam splitter prism of conjunction.
Background technology
With developing rapidly for the development of polarization optics, especially Polarization Detection technology, devating prism is always people pass
The object of note, it be light path be polarized, the core devices of analyzing.It is general at present that devating prism is made using calcite crystal, still
Natural optical grade calcite crystal resource is increasingly exhausted, and finding replacement crystal or Curve guide impeller reduces Iceland spar in single prism
The consumption of material just turns into study hotspot.
The content of the invention
It is an object of the invention to by new prism design, the method combined using optical glass with Iceland spar is designed
A kind of 45 beam splitter prisms of combination, reduce Iceland spar material consumption, are provided simultaneously with the polarization of 45 beam splitting Glan Thompson prisms
Function, the function also when combined prism is reversely used in addition with polarization beam splitting.
H-QK3L glass is a kind of conventional optical window material, as a kind of optical glass, possesses size big, low-cost
Feature, its optics is 290nm ~ 2400nm through scope, covers the transmission scope of calcite crystal prism, and the present invention selects H-
The key technology of QK3L glass is that the principal refractive index dispersion curve of its dispersion of refractive index curve and non-ordinary light in calcite crystal is near
It is perfect to overlap, as shown in Figure 1；When being combined with Iceland spar, by structure design, it can make unusual light almost without selling off
Enter glass from calcite crystal.
The technical solution adopted by the present invention is that isosceles trapezoid prism and right-angle prism pass through methanol glue, optical light glue or tree
Fat glue glued adhesion together, as shown in Figure 2：Described isosceles trapezoid prism material is calcite crystal, and right-angle prism material is H-
QK3L glass；Described H-QK3L glass is optical glass, and H-QK3L is generally acknowledged numbering of the optical field to the glass；Described
Calcite crystal is natural light classes and grades in school calcite crystal；The light pass surface of described isosceles trapezoid prism is trapezoidal bottom surface and two
Central plane, the light pass surface of right-angle prism is a right-angle surface and an inclined-plane；Described isosceles trapezoid prism and right-angle prism, thang-kng
Structure angle S all sames between face, are 67.5 °；In described Iceland spar isosceles trapezoid prism optical axis be oriented parallel to it is trapezoidal
Incident thang-kng central plane, perpendicular to the non-thang-kng right-angle surface of right-angle prism.
As shown in Fig. 2 natural light light beam is incident from prism left vertical, in Iceland spar and glass（The situation of optical cement）Or ice
Continent stone and adhesive（Use the situation of adhesive）On interface, ordinary light is totally reflected, the outgoing of vertical right upper surface, non-ordinary light
Almost without the incident glass sold off or through incident glass after adhesive, last level of approximation is polarized from its right end face outgoing, two
Angle is 45 ° between light beam light.
Existing 45 beam splitting Glan Thompson prism structure two pieces of Iceland spar crystal prisms as shown in figure 3, be made up of；This
Existing 45 beam splitting Glan Thompson prism of 45 beam splitter prisms than same specification that the glass of invention design is combined with Iceland spar
The Iceland spar materials'use amount of reduction 37%, while H-QK3L glass prices are cheap more than Iceland spar, can reduce manufacturing cost.
45 beam splitter prisms that the glass that the present invention is designed is combined with Iceland spar, the H-QK3L glass transmission scopes of use are covered
Lid calcite crystal prism transparency range, therefore the beam splitting Glan Thompson rib of Iceland spar 45 can be completely covered in the combined prism
The applicable wavelengths scope of mirror.
Incidence of the optical axis of Iceland spar isosceles trapezoid prism parallel to isosceles trapezoid in 45 beam splitter prisms that the present invention is designed
Thang-kng central plane, perpendicular to the non-thang-kng right-angle surface of right-angle prism, on the interface of Iceland spar and glass or adhesive, transmitted light beam
The P light for being direction of vibration in plane of incidence, 45 beam splitting Glan Thompson ribs of its transmissivity compared with conventional Iceland spar shown in Fig. 3
Mirror is big, and corresponding reflectivity is small, so 45 beam splitting Glans of the extinction ratio of reflected light light beam than conventional Iceland spar shown in Fig. 3
Thompson prism is high.
45 beam splitter prisms that the glass that the present invention is designed is combined with Iceland spar also have polarization beam splitting when reversely using
Function, as shown in figure 4, natural light light beam is from its right end face vertical incidence：In the case of combined prism uses optical cement, in glass
On Iceland spar interface, light beam enters Iceland spar from glass birefringence, according to folding law, because glass refraction is non-with Iceland spar
Ordinary light principal refractive index approximately equal, non-ordinary light level of approximation, and ordinary light deviates horizontal direction, and in left side outgoing end face again
Outgoing after deviation；In the case of combined prism uses adhesive, light beam enters adhesive from glass refraction, afterwards in adhesive
On Iceland spar interface, light beam enters Iceland spar from adhesive birefringence, according to folding law, because glass refraction and Iceland spar
Non- ordinary light principal refractive index approximately equal, very anaclasis direction are approximately horizontal direction, and ordinary light deviation horizontal direction, and
The outgoing after deviation again of left side outgoing end face.
The beneficial effects of the invention are as follows：Save natural light classes and grades in school calcite crystal resource, prism low manufacture cost, light path point
Beam function is identical with 45 beam splitting Glan Thompson prisms, and the reflected beams extinction ratio is higher than 45 beam splitting Glan Thompson prisms,
Can reversely it use, combined prism has polarization beam splitting function when reversely using.
Brief description of the drawings：
The dispersion of refractive index curve for the H-QK3L glass that Fig. 1 uses for the present invention and the non-ordinary light principal refractive index dispersion curve of Iceland spar
Figure, wherein ngFor the refractive index of H-QK3L glass, neFor the principal refractive index of the non-ordinary light of Iceland spar；
The 45 beam splitter prism structural representations that Fig. 2 combines for the glass of the present invention with Iceland spar, wherein four-headed arrow represents crystal
The direction of optical axis；
Fig. 3 be the existing beam splitting Glan Thompson prism structure schematic diagram of Iceland spar 45, its orbicular spot represent direction perpendicular to
Paper；
Fig. 4 reversely uses light channel structure schematic diagram for 45 beam splitter prisms that the glass of the present invention is combined with Iceland spar, wherein two-way
Arrow represents the direction of the optical axis of crystal.
Embodiment
Embodiment one：As shown in Fig. 2 the material of the isosceles trapezoid prism of composition devating prism is calcite crystal, right angle
The material of prism is H-QK3L glass, and calcite crystal optical axis direction is parallel to trapezoidal incident thang-kng central plane, perpendicular to right angle
Carrying out the structure angle S between gluing, light pass surface by optical light glue between the non-thang-kng right-angle surface of prism, two prisms light pass surface is
67.5, it is 632.8nm to take lambda1-wavelength, now, and the refractive index of optical light glue is 1.5240, H-QK3L optical glass
Refractive index is 1.48601, and the non-ordinary light principal refractive index of calcite crystal is 1.48515, and ordinary light principal refractive index is 1.65567,
Natural light light beam is incident from prism left vertical, on Iceland spar and light-sensitive emulsion interface, and according to the law of refraction, ordinary light occurs complete
Reflection, vertical right upper surface outgoing, non-ordinary light passes through incident glass after adhesive, because of the non-ordinary light principal refractive index of calcite crystal
With glass refraction approximately equal, last level of approximation from angle between its right end face outgoing, two light beam light be 45 °；Will
Combined prism is reversely used, and natural light light beam is incident from prism Right vertical, in adhesive/glass and Iceland spar/adhesive two
On interface, according to the law of refraction, because of non-ordinary light principal refractive index and the glass refraction approximately equal of calcite crystal, non-ordinary light is most
Level of approximation is from left end face outgoing afterwards, and deviation occurs for ordinary light, the outgoing, two beam angles after deviation again in left end face
For 19.2 °.
Embodiment two：As shown in Fig. 2 the material of the isosceles trapezoid prism of composition devating prism is calcite crystal, right angle
The material of prism is H-QK3L glass, and calcite crystal optical axis direction is parallel to trapezoidal incident thang-kng central plane, perpendicular to right angle
Carrying out the structure angle S between gluing, light pass surface by Canada balsam between the non-thang-kng right-angle surface of prism, two prisms light pass surface is
67.5, it is 632.8nm to take lambda1-wavelength, now, and the refractive index of Canada balsam is the folding of 1.52, H-QK3L optical glass
It is 1.48601 to penetrate rate, and the non-ordinary light principal refractive index of calcite crystal is 1.48515, and ordinary light principal refractive index is 1.65567, from
Right light light beam is incident from prism left vertical, and on Iceland spar and resin glue interface, according to the law of refraction, ordinary light is all-trans
Penetrate, the outgoing of vertical right upper surface, non-ordinary light pass through adhesive after incident glass, because calcite crystal non-ordinary light principal refractive index with
Glass refraction approximately equal, last level of approximation from angle between its right end face outgoing, two light beam light be 45 °；By group
Close prism reversely to use, natural light light beam is incident from prism Right vertical, in adhesive/glass and the boundary of Iceland spar/adhesive two
On face, according to the law of refraction, because of non-ordinary light principal refractive index and the glass refraction approximately equal of calcite crystal, non-ordinary light is last
Level of approximation is from left end face outgoing, and deviation occurs for ordinary light, the outgoing after deviation again in left end face, and two beam angles are
19.2°。
Embodiment three：As shown in Fig. 2 the material of the isosceles trapezoid prism of composition devating prism is calcite crystal, right angle
The material of prism is H-QK3L glass, and calcite crystal optical axis direction is parallel to trapezoidal incident thang-kng central plane, perpendicular to right angle
Carrying out the structure angle S between gluing, light pass surface by methanol glue between the non-thang-kng right-angle surface of prism, two prisms light pass surface is
67.5, it is 632.8nm to take lambda1-wavelength, now, and the refractive index of methanol glue is the refractive index of 1.519, H-QK3L optical glass
For 1.48601, the non-ordinary light principal refractive index of calcite crystal is 1.48515, and ordinary light principal refractive index is 1.65567, natural light
Light beam is incident from prism left vertical, and on Iceland spar and methanol glue interface, according to the law of refraction, ordinary light is totally reflected,
Vertical right upper surface outgoing, non-ordinary light passes through incident glass after adhesive, because of the non-ordinary light principal refractive index and glass of calcite crystal
Glass refractive index approximately equal, last level of approximation from angle between its right end face outgoing, two light beam light be 45 °；Will combination
Prism is reversely used, and natural light light beam is incident from prism Right vertical, in adhesive/glass and the interface of Iceland spar/adhesive two
On, according to the law of refraction, because of non-ordinary light principal refractive index and the glass refraction approximately equal of calcite crystal, non-ordinary light is finally near
Like level from left end face outgoing, deviation occurs for ordinary light, the outgoing after deviation again in left end face, and two beam angles are
19.2°。
Example IV：As shown in Fig. 2 the material of the isosceles trapezoid prism of composition devating prism is calcite crystal, right angle
The material of prism is H-QK3L glass, and calcite crystal optical axis direction is parallel to trapezoidal incident thang-kng central plane, perpendicular to right angle
Optical cement is glued between the non-thang-kng right-angle surface of prism, two prisms light pass surface, and the structure angle S between light pass surface is 67.5, takes incident light
Wavelength is 632.8nm, now, and the refractive index of H-QK3L optical glass is 1.48601, the non-ordinary light principal refractive index of calcite crystal
For 1.48515, ordinary light principal refractive index is 1.65567, and natural light light beam is incident from prism left vertical, in Iceland spar and glass
On interface, according to the law of refraction, ordinary light is totally reflected, and the outgoing of vertical right upper surface, very anaclasis enter glass, because of ice
The non-ordinary light principal refractive index of continent stone crystal and glass refraction approximately equal, last level of approximation are inclined from its right end face outgoing, two
The angle between light beam light that shakes is 45 °；Combined prism is reversely used, natural light light beam is incident from prism Right vertical, in ice continent
On stone and glass interface, according to the law of refraction, occurs birefringence, because of the non-ordinary light principal refractive index and glass refraction of calcite crystal
Rate approximately equal, the non-last level of approximation of ordinary light is from left end face outgoing, and deviation occurs for ordinary light, inclined again in left end face
Outgoing after folding, two beam angles are 19.2 °.
Claims (2)
1. 45 polarization beam splitter prisms that a kind of glass is combined with Iceland spar, including one piece of isosceles trapezoid prism and one piece of right-angled edge
Mirror, the light pass surface of isosceles trapezoid prism is trapezoidal bottom surface and two central planes, and the light pass surface of right-angle prism is a right-angle surface and oblique
Structure angle between face, light pass surface is 67.5 °, it is characterised in that：Described isosceles trapezoid prism, right-angle prism material are respectively
Calcite crystal and H-QK3L glass, the optical axis of Iceland spar isosceles trapezoid prism parallel to isosceles trapezoid incident thang-kng central plane,
Perpendicular to the non-thang-kng right-angle surface of right-angle prism.
2. 45 polarization beam splitter prisms that a kind of glass according to claim 1 is combined with Iceland spar, it is characterised in that：Two
Combination between prism light pass surface can be optical cement, methanol glue, optical light glue or resin glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339159.XA CN107167927A (en) | 2017-05-15 | 2017-05-15 | 45 ° of polarization beam splitter prisms that a kind of glass is combined with Iceland spar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339159.XA CN107167927A (en) | 2017-05-15 | 2017-05-15 | 45 ° of polarization beam splitter prisms that a kind of glass is combined with Iceland spar |
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| Publication Number | Publication Date |
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| CN107167927A true CN107167927A (en) | 2017-09-15 |
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| CN201710339159.XA Pending CN107167927A (en) | 2017-05-15 | 2017-05-15 | 45 ° of polarization beam splitter prisms that a kind of glass is combined with Iceland spar |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5945037A (en) * | 1996-03-05 | 1999-08-31 | The Regents Of The University Of California | Optical polarizer material |
| CN101587202A (en) * | 2009-06-24 | 2009-11-25 | 福州高意通讯有限公司 | Polarizer of optical body |
| CN201489132U (en) * | 2009-06-24 | 2010-05-26 | 福州高意通讯有限公司 | crystal polarizer |
| CN102749670A (en) * | 2012-07-02 | 2012-10-24 | 杭州科汀光学技术有限公司 | Broadband prism multilayer film polarizing beam splitter |
-
2017
- 2017-05-15 CN CN201710339159.XA patent/CN107167927A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5945037A (en) * | 1996-03-05 | 1999-08-31 | The Regents Of The University Of California | Optical polarizer material |
| CN101587202A (en) * | 2009-06-24 | 2009-11-25 | 福州高意通讯有限公司 | Polarizer of optical body |
| CN201489132U (en) * | 2009-06-24 | 2010-05-26 | 福州高意通讯有限公司 | crystal polarizer |
| CN102749670A (en) * | 2012-07-02 | 2012-10-24 | 杭州科汀光学技术有限公司 | Broadband prism multilayer film polarizing beam splitter |
Non-Patent Citations (1)
| Title |
|---|
| 任树锋: "冰洲石-玻璃组合偏光棱镜的研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
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Application publication date: 20170915 |