CN202362475U - Polarized beam splitter prism using optical contact - Google Patents
Polarized beam splitter prism using optical contact Download PDFInfo
- Publication number
- CN202362475U CN202362475U CN2011204869588U CN201120486958U CN202362475U CN 202362475 U CN202362475 U CN 202362475U CN 2011204869588 U CN2011204869588 U CN 2011204869588U CN 201120486958 U CN201120486958 U CN 201120486958U CN 202362475 U CN202362475 U CN 202362475U
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- Prior art keywords
- glass
- prism
- optical cement
- polarized beam
- isosceles trapezoid
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Abstract
The utility model discloses a polarized beam splitter prism using optical contact. The polarized beam splitter prism is characterized by comprising a pair of glass prisms in isosceles trapezoid shape with base angles of 45 degrees, and a flat glass sheet, wherein the glass prisms and the flat glass sheet are made of regular optical glass. The same polarized beam splitting membranes are coated on the bottom surfaces of the pair of glass prisms in isosceles trapezoid shape with base angles of 45 degrees, and the flat glass sheet is bonded between the glass prisms by optical contact to form the following sandwich structure: glass/polarized beam splitting membrane/glass/polarized beam splitting membrane/glass. The polarized beam splitter prism has the characteristics of high damage threshold, high extinction ratio, low cost and simple structure, and is convenient to process and suitable for production on a large scale.
Description
Technical field
The present invention relates to optical field, especially a kind of optical cement polarization splitting prism in the optical element.
Background technology
Polarizing prism is a kind of device that often uses in the polarization light path, mainly plays the effect of polarization spectro, in laser system, and optical communication device and optical tests measurement instrument, consumption industries such as display instrument have a wide range of applications.
The structure of existing glass polarization splitting prism is: be made up of the pair of straight angle prism; The inclined-plane of one of them right-angle prism is coated with polarization beam splitter; The inclined-plane of a slice right-angle prism is a polished surface in addition; The inclined-plane gummed or the optical cement of two prisms form, and four right angle faces are coated with anti-reflection film, the reflection loss when passing through prism to reduce light.Natural light incident; Outgoing be two bundle degree of polarizations very high linearly polarized lights, Tp:Ts>1000:1, this two bundles polarized light is vertical each other; But in a lot of system applies; Need higher extinction ratio, at this moment the existing glass polarizing prism can not meet the demands, and the gummed polarization splitting prism passes through in ultraviolet hardly.
In addition, the Glan laser prism of existing High Extinction Ratio, material is a birefringece crystal, extinction ratio is high, but crystalline material costs an arm and a leg, and is prone to cleavage, deliquescence, bad processing.
Utility model patent ZL02215330.6 has announced a kind of glass polarizing prism of High Extinction Ratio; Two sides of gummed, inclined-plane of two right-angle prisms is coated with the plain film of polarization beam splitter; Adopt gluing technique, ultraviolet, deep ultraviolet wave band, glue is printing opacity hardly; And in other wave band application, the absorption of glue is big; Though guaranteed the high extinction ratio of P light, the extinction ratio that the S polarized light is still conventional.
Summary of the invention
The object of the present invention is to provide a kind of optical cement polarization splitting prism, possess superior extinction ratio performance, simple in structure, be easy to mass production, damage threshold is high.
The technical solution adopted for the present invention to solve the technical problems is:
1.A kind of optical cement polarization splitting prism; By a pair of base angle is that 45o isosceles trapezoid glass prism and a glass planar sheets optical cement combine; It is characterized in that: said a pair of base angle is that the bottom surface of 45o isosceles trapezoid glass prism is coated with identical polarization beam splitter simultaneously, the glass planar sheets of a polishing both surfaces of middle optical cement; Four waists of said 45o isosceles trapezoid prism are coated with anti-reflection film; Said base angle is that the material of 45o isosceles trapezoid glass prism and glass planar sheets can be an optical glass; Said a pair of base angle is that the bottom surface or the glass planar sheets of 45o isosceles trapezoid glass prism is coated with one deck SiO for the face that polishes
2Joint face adopts optical cement or deepens optical cement technology bonding and connects.
Light path principle of the present invention is: incidence natural lights, and the central plane vertical incidence from first 45o isosceles trapezoid prism enters into the ground floor polarization beam splitter, P transmittance, the reflection of S light; P light enters into second layer polarization beam splitter through glass planar sheets, at last from the vertical outgoing of central plane of second 45o isosceles trapezoid prism; The S light of reflection incides the end face of first 45o isosceles trapezoid prism, and total reflection takes place, and incides the first polarization spectro rete once more, and S light is secondary reflection again, from the vertical outgoing of central plane of first 45o isosceles trapezoid prism.P light and S light are all distinguished twice through polarization beam splitter, and extinction ratio all is equivalent to two existing optical cement polarization splitting prisms and is together in series.
Description of drawings
Fig. 1 is the structural representation one of a kind of optical cement polarization splitting prism of the present invention.
Fig. 2 is the structural representation two of a kind of optical cement polarization splitting prism of the present invention.
Fig. 3 is the structural representation three of a kind of optical cement polarization splitting prism of the present invention.
Embodiment
Like Fig. 1, choose optical glass SF2, being processed into two the same base angles is 45o isosceles trapezoid glass prism 101 and 103 and glass planar sheets 102, face 201 to 212 polishings, four waists 201,207,203,205 of 45o isosceles trapezoid prism are coated with anti-reflection film; Bottom surface 209,212 plating polarization beam splitters, 209 optical cements of glass blocks 210 and 45o isosceles trapezoid glass prism are perhaps deepened optical cement and are connected; 212 optical cements of glass blocks 211 and 45o isosceles trapezoid glass prism are perhaps deepened optical cement and are connected.
Incidence natural lights, central plane 201 vertical incidence from first 45o isosceles trapezoid prism enter into ground floor polarization beam splitter 209, P transmittance, the reflection of S light; P light enters into second layer polarization beam splitter 212 through glass planar sheets 102, at last from the central plane 205 vertical outgoing of second 45o isosceles trapezoid prism; The S light of reflection incides the end face 208 of first 45o isosceles trapezoid prism, and total reflection takes place, and incides the first polarization spectro rete 209 once more, and S light is secondary reflection again, from the central plane 207 vertical outgoing of first 45o isosceles trapezoid prism.P light and S light are all distinguished twice through polarization beam splitter, and extinction ratio all is equivalent to two existing optical cement polarization splitting prisms and is together in series.
Claims (4)
1. optical cement polarization splitting prism; By a pair of base angle is that 45o isosceles trapezoid glass prism and a glass planar sheets optical cement combine; It is characterized in that: said a pair of base angle is that the bottom surface of 45o isosceles trapezoid glass prism is coated with identical polarization beam splitter simultaneously, the glass planar sheets of a polishing both surfaces of middle optical cement.
2. a kind of optical cement polarization splitting prism according to claim 1 is characterized in that: four waists of said 45o isosceles trapezoid prism are coated with anti-reflection film.
3. a kind of optical cement polarization splitting prism according to claim 1 is characterized in that: said base angle is that the bottom surface or the glass planar sheets of 45o isosceles trapezoid glass prism is coated with one deck SiO for the face that polishes
2
4. a kind of optical cement polarization splitting prism according to claim 1 is characterized in that: joint face adopts optical cement or deepens optical cement technology bonding and connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204869588U CN202362475U (en) | 2011-11-30 | 2011-11-30 | Polarized beam splitter prism using optical contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204869588U CN202362475U (en) | 2011-11-30 | 2011-11-30 | Polarized beam splitter prism using optical contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362475U true CN202362475U (en) | 2012-08-01 |
Family
ID=46573653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204869588U Expired - Fee Related CN202362475U (en) | 2011-11-30 | 2011-11-30 | Polarized beam splitter prism using optical contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362475U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495436A (en) * | 2011-11-30 | 2012-06-13 | 福建福晶科技股份有限公司 | Optical-cement polarized beam splitting prism |
| CN105093366A (en) * | 2014-04-30 | 2015-11-25 | 诺方（哈尔滨）科技股份有限公司 | Polarization beam splitting prism, fundamental wave interference unit and comb wave separator |
-
2011
- 2011-11-30 CN CN2011204869588U patent/CN202362475U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495436A (en) * | 2011-11-30 | 2012-06-13 | 福建福晶科技股份有限公司 | Optical-cement polarized beam splitting prism |
| CN105093366A (en) * | 2014-04-30 | 2015-11-25 | 诺方（哈尔滨）科技股份有限公司 | Polarization beam splitting prism, fundamental wave interference unit and comb wave separator |
| CN105093366B (en) * | 2014-04-30 | 2017-11-14 | 诺方（哈尔滨）科技股份有限公司 | Polarization splitting prism, fundamental wave interference unit and Interleaver |
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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: 20151130 |
|
| EXPY | Termination of patent right or utility model |