CN102967942A - Adjustable beam displacer - Google Patents
Adjustable beam displacer Download PDFInfo
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- CN102967942A CN102967942A CN2012104432698A CN201210443269A CN102967942A CN 102967942 A CN102967942 A CN 102967942A CN 2012104432698 A CN2012104432698 A CN 2012104432698A CN 201210443269 A CN201210443269 A CN 201210443269A CN 102967942 A CN102967942 A CN 102967942A
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Abstract
The invention discloses an adjustable beam displacer. The displacer comprises two crystal prism structures made of birefringent crystals Calcite, YVO4, TiO2, alpha-BBO, Quartz and LiNbO3, an optical axis is parallel to a light pass surface, and a structural angle satisfies the following requirements: for a negative uniaxial crystal, an e light is subjected to total transmission, and an o light is subjected to five times of total reflection; for a positive uniaxial crystal, the e light is subjected to five times of total reflection, and the o light is subjected to total transmission; and the two prisms are rotatably coupled along a slope in a mode of gluing, contact blocking or air gap connection. During adjustment, a separation distance d between the e light and the o light can be adjusted only through regulation of the position of the incident light, and the operation is convenient.
Description
Affiliated technical field
The present invention relates to a kind of beam separation device in optics and the laser field, especially a kind of adjustable light beam discrete device.
Background technology
In optics and laser field, a branch of natural light or nonpolarized light need to be separated into two bunch polarized lights, the exit direction of light is parallel with incident direction, and this device is called beam splitter beam displacer.
The conventional beam separation vessel adopts rectangular structure, and optical axis and optical direction are at 45 °, utilize e light separating distance d computing formula to be:
[0004]For the conventional beam separation vessel, there are two point defects:
1. material is certain, and distance of separation and the proportional relation of logical light length are non-adjustable; 2. need to obtain large beam separation distance, and require crystal length short, need to select the large crystal of double refractive inde, generally select Calcite, YVO
4, TiO
2Or LiNbO
3
Summary of the invention
The problem that exists in order to solve above-mentioned conventional beam separation vessel, designed a kind of adjustable light beam discrete device, comprise the positive single shaft birefringece crystal of a slice prism, a slice is born the single axial birefringence crystal prism, described positive single shaft birefringece crystal prism and negative single axial birefringence crystal prism are coupled with rotation mode along the inclined-plane, and coupling scheme can connect for gummed, optical cement or air-gap;
Described positive single shaft birefringece crystal prism optical axis is parallel with logical light face, and structure angle satisfies e light and is all-trans o light full impregnated 5 times;
Described negative single axial birefringence crystal prism optical axis is parallel with logical light face, and structure angle satisfies e light full impregnated, and o light is all-trans 5 times;
Described positive single shaft birefringece crystal and negative single axial birefringence crystalline material can be Calcite, YVO
4, TiO
2, α-BBO, Quartz, LiNbO
3
Further, require below two crystal prism processing are satisfied:
[0006]The face that all light pass through is polishing and plated film all; Reflectance coating need to be plated in the side of two prisms.
Further, the present invention is take uniaxial negative crystal as example, and natural light impinges perpendicularly on the first crystal prism from the plane of incidence, in the inclined-plane of first crystal prism (joint face) e light transmission, is directly incident in second crystal prism, from the vertical outgoing of exit facet; O light is all-trans on the inclined-plane of first crystal prism (joint face), incide the side of first crystal prism, there is polishing plating reflectance coating the side, the inclined-plane (joint face) that o light is all-trans and impinges perpendicularly on the first crystal prism, then incide the exit facet generation total reflection of second crystal prism, incide the side of second crystal prism, there is polishing plating reflectance coating the side, total reflection occurs in the o light inclined-plane (joint face) that incides second crystal prism that is all-trans, at last from the vertical outgoing of exit facet of second crystal prism; Therefore e light and o light are all from the vertical outgoing of exit facet.
Further, regulate the position of incident light, o light is because Multi reflection is finally different from the position of second crystal prism exit facet outgoing, and e light directly enters into second crystal prism from the inclined-plane transmission of first crystal prism, finally also vertical outgoing, the position of outgoing is also different.At this moment, e light and o light separating distance have produced variation.
The separating distance of e light and o light just can be regulated in the position that patent of the present invention only need to be regulated incident light, and is easy to operate.
Description of drawings
Figure (1) is traditional beam separation device structural representation
Figure (2) be a kind of adjustable light beam discrete device structural representation of the present invention wherein 11 for positive single shaft birefringece crystal prism, 12 for bearing the single axial birefringence crystal prism, 13 is cementing layer, 101 are logical light face, and 102 is the inclined-plane, and 103 is the inclined-plane, 104 is the inclined-plane, and 105 are logical light face, and 106 is the inclined-plane.
Specific embodiment
Now the present invention is further described with embodiment by reference to the accompanying drawings.
Embodiment 1:
Such as figure (1), be a kind of adjustable light beam discrete device structural representation of the present invention, comprise two crystal prism structures 11 and 12, air-gap 13; Crystalline material is selected Calcite, crystal prism 11 is parallel with 105 with logical light face 101 respectively with 12 optical axis, and structure angle α is 36.5 °-42.5 °, and it is 39.7 ° of convenient calculating that this example is chosen α, and two crystal prism 11 and 12 103 and 104 are coupled with rotation mode along the inclined-plane; 101,102,103 mirror polish of crystal prism 11,102 faces are coated with the high-reflecting film to o light; 104,105,106 mirror polish of crystal prism 12,106 faces are coated with the high-reflecting film to o light.
Further, natural light impinges perpendicularly on first crystal prism 11 from the plane of incidence 101, in the inclined-plane of first crystal prism (joint face) 103 e light transmission, is directly incident in second crystal prism 12, from exit facet 105 vertical outgoing; 103 o light are all-trans on the inclined-plane of first crystal prism 11 (joint face), incide the side 102 of first crystal prism 11, there is polishing plating reflectance coating side 102, the inclined-plane 103(joint face that o light is all-trans and impinges perpendicularly on first crystal prism 11), total reflection occurs in the exit facet 105 that then incides second crystal prism 12, incide the side 106 of second crystal prism 12, there is polishing plating reflectance coating side 106, total reflections occur in the o light inclined-plane (joint face) 104 that incides second crystal prism 12 that is all-trans, at last from the exit facet 105 vertical outgoing of second crystal prism 12; At this moment, e light and o light are all from the vertical outgoing of exit facet.
Further, regulate the position of incident light, o light is because Multi reflection is finally different from the position of second crystal prism, 12 exit facets, 105 outgoing, e light directly enters into second crystal prism 12 from inclined-plane 103 transmissions of first crystal prism 11, finally also vertical outgoing, the position of outgoing is also different.Therefore, e light and o light separating distance have produced variation.The separating distance d of e light and o light just can be regulated in the position that only need to regulate incident light, and is easy to operate.
Embodiment 2:
Such as figure (1), be a kind of adjustable light beam discrete device structural representation of the present invention, comprise two crystal prism structures 11 and 12, air-gap 13; Crystalline material is selected YVO
4, crystal prism 11 is parallel with 105 with logical light face 101 respectively with 12 optical axis, and structure angle α is 26.5 °-31 °, and it is 39.7 ° of convenient calculating that this example is chosen α, and two crystal prism 11 and 12 103 and 104 are coupled with rotation mode along the inclined-plane; 101,102,103 mirror polish of crystal prism 11,102 faces are coated with the high-reflecting film to e light; 104,105,106 mirror polish of crystal prism 12,106 faces are coated with the high-reflecting film to e light.
Further, natural light impinges perpendicularly on first crystal prism 11 from the plane of incidence 101, in the inclined-plane of first crystal prism (joint face) 103 o light transmission, is directly incident in second crystal prism 12, from exit facet 105 vertical outgoing; 103 e light are all-trans on the inclined-plane of first crystal prism 11 (joint face), incide the side 102 of first crystal prism 11, there is polishing plating reflectance coating side 102, the inclined-plane 103(joint face that e light is all-trans and impinges perpendicularly on first crystal prism 11), total reflection occurs in the exit facet 105 that then incides second crystal prism 12, incide the side 106 of second crystal prism 12, there is polishing plating reflectance coating side 106, total reflections occur in the e light inclined-plane (joint face) 104 that incides second crystal prism 12 that is all-trans, at last from the exit facet 105 vertical outgoing of second crystal prism 12; At this moment, e light and o light are all from the vertical outgoing of exit facet.
Further, regulate the position of incident light, e light is because Multi reflection is finally different from the position of second crystal prism, 12 exit facets, 105 outgoing, o light directly enters into second crystal prism 12 from the inclined-plane transmission of first crystal prism, finally also vertical outgoing, the position of outgoing is also different.Therefore, e light and o light separating distance have produced variation.The separating distance d of e light and o light just can be regulated in the position that only need to regulate incident light, and is easy to operate.
Claims (4)
1. adjustable light beam discrete device, comprise the positive single shaft birefringece crystal of a slice prism, a slice is born the single axial birefringence crystal prism, it is characterized in that: positive single shaft birefringece crystal prism and negative single axial birefringence crystal prism are coupled with rotation mode along the inclined-plane, and coupling scheme can connect for gummed, optical cement or air-gap.
2. a kind of adjustable light beam discrete device according to claim 1 is characterized in that described positive single shaft birefringece crystal prism optical axis is parallel with logical light face, and structure angle satisfies e light and is all-trans o light full impregnated 5 times.
3. a kind of adjustable light beam discrete device according to claim 1 is characterized in that described negative single axial birefringence crystal prism optical axis is parallel with logical light face, and structure angle satisfies e light full impregnated, and o light is all-trans 5 times.
4. a kind of adjustable light beam discrete device according to claim 1 is characterized in that described positive single shaft birefringece crystal and negative single axial birefringence crystalline material can be Calcite, YVO
4, TiO
2, α-BBO, Quartz, LiNbO
3
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|---|---|---|---|
| CN2012104432698A CN102967942A (en) | 2012-11-08 | 2012-11-08 | Adjustable beam displacer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104432698A CN102967942A (en) | 2012-11-08 | 2012-11-08 | Adjustable beam displacer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3449039A (en) * | 1965-07-02 | 1969-06-10 | Ibm | Non-parallel surfaced light-deflector selector |
| US5426529A (en) * | 1991-09-26 | 1995-06-20 | Linotype-Hell Ag | Light beam deflection means |
| CN1459640A (en) * | 2002-05-21 | 2003-12-03 | 中国科学院福建物质结构研究所 | Polarized prism made of yttrium vonadate crystal |
| CN1650200A (en) * | 2002-04-26 | 2005-08-03 | 国际商业机器公司 | Polarizing beamsplitter |
| CN201004093Y (en) * | 2006-06-26 | 2008-01-09 | 福州高意通讯有限公司 | A polarization bundle prism |
| CN101551484A (en) * | 2009-05-08 | 2009-10-07 | 福州福特科光电有限公司 | Deep ultraviolet ultra-wideband polarizer |
| CN202904134U (en) * | 2012-11-08 | 2013-04-24 | 福建福晶科技股份有限公司 | Adjustable beam displacer |
-
2012
- 2012-11-08 CN CN2012104432698A patent/CN102967942A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3449039A (en) * | 1965-07-02 | 1969-06-10 | Ibm | Non-parallel surfaced light-deflector selector |
| US5426529A (en) * | 1991-09-26 | 1995-06-20 | Linotype-Hell Ag | Light beam deflection means |
| CN1650200A (en) * | 2002-04-26 | 2005-08-03 | 国际商业机器公司 | Polarizing beamsplitter |
| CN1459640A (en) * | 2002-05-21 | 2003-12-03 | 中国科学院福建物质结构研究所 | Polarized prism made of yttrium vonadate crystal |
| CN201004093Y (en) * | 2006-06-26 | 2008-01-09 | 福州高意通讯有限公司 | A polarization bundle prism |
| CN101551484A (en) * | 2009-05-08 | 2009-10-07 | 福州福特科光电有限公司 | Deep ultraviolet ultra-wideband polarizer |
| CN202904134U (en) * | 2012-11-08 | 2013-04-24 | 福建福晶科技股份有限公司 | Adjustable beam displacer |
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Application publication date: 20130313 |