CN1393702A - Polarizing-splitting prism - Google Patents
Polarizing-splitting prism Download PDFInfo
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- CN1393702A CN1393702A CN 01115107 CN01115107A CN1393702A CN 1393702 A CN1393702 A CN 1393702A CN 01115107 CN01115107 CN 01115107 CN 01115107 A CN01115107 A CN 01115107A CN 1393702 A CN1393702 A CN 1393702A
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- voussoir
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- polarizing
- splitting prism
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Abstract
A polarizing and splitting prism is composed of a fixing frame, lower and upper crystal wedges made of gadolinium vanadate, and an interface between the said wedges. The wedge angle of the said wedges is 63-75 deg, the width of light incidance plane a=8-20 mm, and its height b=8-20 mm. The optical axises of said wedges are parallel, the reflection of said interface is less than 0.25%.
Description
What the present invention relates to is the optical device of using in laser technology and the optical communication technique, especially a kind of polarizing-splitting prism.
In polarization interference microscope, optical activity meter and monitoring of some polarized lights and light intensity detection system, the widespread use polarizing-splitting prism, and polarizing-splitting prism in the prior art is to make down crystal voussoir and last crystal voussoir with calcite crystal or quartz crystal, this also is unique two kinds of beam splitter prisms that can make transmitted light beam not produce transversal displacement, but calcite crystal is difficult for being made into accurate optical device, occur easily man-hour adding " fall caye ", can't obtain high optical quality, make the transmitted light beam quality extreme difference of prism, often influence the precision of total system; If adopt quartz crystal to make, because the optically-active effect of quartz crystal itself can't obtain high-quality polarization light again.
Purpose of the present invention, be exactly at the existing in prior technology deficiency, and a kind of polarizing-splitting prism technical scheme is provided, its ordinary refraction index of vanadic acid gadolinium crystal of this scheme and unusual optical index are all very big, thereby, the cirtical angle of total reflection and Brewster angle are very approaching, thereby suppressed the repeatedly reflection loss of crystal voussoir surface of contact, transmittance is obviously improved, guaranteed the quality of transmitted light beam, and do not produce the optically-active effect, can obviously improve the performance of system.
This programme is realized by following technical measures.Mainly include fixed cover and the following crystal voussoir of fixed cover internal fixation, on crystal voussoir and two crystal voussoir surface of contact, the characteristics of this programme are that described crystal voussoir down and last crystal voussoir are the vanadic acid gadolinium crystals that adopts, two direction of optic axis of following crystal voussoir and last crystal voussoir are vertical mutually, and the optical axis of the following crystal voussoir of light beam incident direction is parallel with the incident ray of vertical incidence surface; The angle of wedge S of following crystal voussoir and last crystal voussoir is the 65-75 degree, the width a=8-20 millimeter of incidence surface, height b=8-20 millimeter.The concrete characteristics of this programme also have, and the described crystal voussoir down and the logical light face of last crystal voussoir and the flatness of two crystal voussoir surface of contact are better than 1/4th of 632.8 nano wave lengths.The surface reflection behind the plating anti-reflection film of the logical light face of described crystal voussoir down and last crystal voussoir and two crystal voussoir surface of contact is less than 0.25%.
According to as can be known to the narration of such scheme, because the following crystal voussoir and the last crystal voussoir that in this scheme, have adopted the vanadic acid gadolinium crystal to be processed into, and the vanadic acid gadolinium crystal can adopt manual method to produce in batches, vanadic acid gadolinium crystal defective with artificial growth is few, visible absorption is more little, deliquescence not, temperature stability is good, has processing characteristics preferably, and its ordinary refraction index of vanadic acid gadolinium crystal and unusual optical index are all very big, thereby, the cirtical angle of total reflection and Brewster angle are very approaching, thereby suppressed the repeatedly reflection loss of crystal voussoir surface of contact, the logical light face and the two crystal voussoir surface of contact that add crystal again are higher through the precise polished flatness that makes, and make surface reflection little behind the plating anti-reflection film again, this all makes the light beam transmittance obviously improve, generally can reach 95%-96%, and the wavefront distortion of transmitted beam has guaranteed the quality of transmitted light beam less than 1/10th of 632.8 nano wave lengths, and do not produce the optically-active effect, can obviously improve the performance of system.This shows that the present invention compared with prior art has outstanding substantive distinguishing features and obvious improvement, its implementation result also is conspicuous.
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by two specific embodiments.
Description of drawings:
Fig. 1 is the sectional structure synoptic diagram of the embodiment of the invention;
Fig. 2 is the left TV structure synoptic diagram of Fig. 1.
Embodiment 1: be Romania and Hungary (Rochen) polarizing-splitting prism, by accompanying drawing as can be seen, the Romania and Hungary of present embodiment (Rochen) polarizing-splitting prism, mainly include fixed cover 1 and at the following crystal voussoir 2 of fixed cover 1 internal fixation, last crystal voussoir 4 and two crystal voussoir surface of contact 3, the characteristics of this programme are that described crystal voussoir 2 down and last crystal voussoir 4 are the vanadic acid gadolinium crystals that adopt, two direction of optic axis of following crystal voussoir 2 and last crystal voussoir 4 are vertical mutually, and the optical axis of the following crystal voussoir 2 of light beam incident direction is parallel with the incident ray of vertical incidence surface, and the direction of optic axis of last crystal voussoir 4 is that horizontal direction is vertical with the optical axis of following crystal voussoir 2; The angle of wedge S of following crystal voussoir 2 and last crystal voussoir 4 is the 63-75 degree, the width a=8-20 millimeter of incidence surface, and height b=8-20 millimeter, the synthetic length of two voussoir crystal is then pressed application requirements and is decided.The described crystal voussoir 2 down and the logical light face of last crystal voussoir 4 and the flatness of two crystal voussoir surface of contact 3 are better than 1/4th of 632.8 nano wave lengths.The surface reflection behind the plating anti-reflection film of the logical light face of described crystal voussoir 2 down and last crystal voussoir 4 and two crystal voussoir surface of contact 3 is less than 0.25%.
Embodiment 2: be Sai Nameng (Senarmont) polarizing-splitting prism, by accompanying drawing as can be seen, the Sai Nameng of present embodiment (Senarmont) polarizing-splitting prism, mainly include fixed cover 1 and at the following crystal voussoir 2 of fixed cover 1 internal fixation, last crystal voussoir 4 and two crystal voussoir surface of contact 3, the characteristics of this programme are that described crystal voussoir 2 down and last crystal voussoir 4 are the vanadic acid gadolinium crystals that adopt, two direction of optic axis of following crystal voussoir 2 and last crystal voussoir 4 are vertical mutually, and the optical axis of the following crystal voussoir 2 of light beam incident direction is parallel with the incident ray of vertical incidence surface, and the direction of optic axis of last crystal voussoir 4 is that vertical direction is vertical with the optical axis of following crystal voussoir 2; The angle of wedge S of following crystal voussoir 2 and last crystal voussoir 4 is the 63-75 degree, the width a=8-20 millimeter of incidence surface, and height b=8-20 millimeter, the synthetic length of two voussoir crystal is then pressed application requirements and is decided.The described crystal voussoir 2 down and the logical light face of last crystal voussoir 4 and the flatness of two crystal voussoir surface of contact 3 are better than 1/4th of 632.8 nano wave lengths.The surface reflection behind the plating anti-reflection film of the logical light face of described crystal voussoir 2 down and last crystal voussoir 4 and two crystal voussoir surface of contact 3 is less than 0.25%.
Claims (3)
1. polarizing-splitting prism, mainly include fixed cover [1] and at the following crystal voussoir [2] of fixed cover [1] internal fixation, go up crystal voussoir [4] and two crystal voussoir surface of contact [3], it is characterized in that described crystal voussoir [2] down and last crystal voussoir [4] are the vanadic acid gadolinium crystals that adopts, following crystal voussoir [2] is vertical mutually with two direction of optic axis of last crystal voussoir [4], and the optical axis of the following crystal voussoir [2] of light beam incident direction is parallel with the incident ray of vertical incidence surface; The angle of wedge S of following crystal voussoir [2] and last crystal voussoir [4] is the 63-75 degree, the width a=8-20 millimeter of incidence surface, height b=8-20 millimeter.
2. polarizing-splitting prism according to claim 1 is characterized in that the described crystal voussoir [2] down and the logical light face of last crystal voussoir [4] and the flatness of two crystal voussoir surface of contact [3] are better than 1/4th of 632.8 nano wave lengths.
3. polarizing-splitting prism according to claim 1 and 2 is characterized in that the logical light face of described down crystal voussoir [2] and last crystal voussoir [4] and the surface reflection of two crystal voussoir surface of contact [3] after plating anti-reflection film are less than 0.25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115107 CN1393702A (en) | 2001-06-26 | 2001-06-26 | Polarizing-splitting prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115107 CN1393702A (en) | 2001-06-26 | 2001-06-26 | Polarizing-splitting prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1393702A true CN1393702A (en) | 2003-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01115107 Pending CN1393702A (en) | 2001-06-26 | 2001-06-26 | Polarizing-splitting prism |
Country Status (1)
| Country | Link |
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| CN (1) | CN1393702A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200597A (en) * | 2010-03-23 | 2011-09-28 | 宋连科 | Air gap type BBO (Barium Boron Oxide) laser polarizing prism |
| CN101866058B (en) * | 2005-01-21 | 2013-12-04 | 株式会社尼康 | Polarization conversion device |
-
2001
- 2001-06-26 CN CN 01115107 patent/CN1393702A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866058B (en) * | 2005-01-21 | 2013-12-04 | 株式会社尼康 | Polarization conversion device |
| CN102200597A (en) * | 2010-03-23 | 2011-09-28 | 宋连科 | Air gap type BBO (Barium Boron Oxide) laser polarizing prism |
| CN102200597B (en) * | 2010-03-23 | 2012-11-14 | 宋连科 | Air gap type BBO (Barium Boron Oxide) laser polarizing prism |
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