CN2175425Y - Adjustable angle of skew prism - Google Patents
Adjustable angle of skew prism Download PDFInfo
- Publication number
- CN2175425Y CN2175425Y CN 93242288 CN93242288U CN2175425Y CN 2175425 Y CN2175425 Y CN 2175425Y CN 93242288 CN93242288 CN 93242288 CN 93242288 U CN93242288 U CN 93242288U CN 2175425 Y CN2175425 Y CN 2175425Y
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- prism
- light
- angle
- optical
- beams
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Abstract
The name of the utility model is adjustable angle beam splitting prism belonging to the field of optical instruments. The beam splitting prism is an element which is widely used in an optical system. When the usual beam splitting prism splits a beam of light into two beams, the two beams of light are not crossed at the point of a leaving device. If an inventive novel four prism is adopted, the two beams of light can be crossed after the two beams of light leaves the prism, and cross angle can be continuously adjusted (0-20 DEG). The prism is manufactured by optical glass. The utility model solves the problem that system integrity is lowered and shock resistance is weak when a usual beam splitting device is used. The prism has the advantages of simple structure, reliable operation and convenient use, and can be used in an optical experiment and the production of information optical elements and holographic optical elements.
Description
Title of the present utility model is adjustable angle of cut beam splitter prism, belongs to the optical instrument technical field.
The utility model relates to a kind of light beam beam splitting arrangement, is called adjustable angle of cut beam splitter prism.It divides work two bundles a branch of light, and this two-beam intersects in separating device a distance, and the angle of cut is adjustable continuously.
Beam splitter is widely used a kind of optical element in the optical system.When common beam splitter was divided into two bundles with a branch of light, this two-beam was no longer crossing at the separating device place.In optical system, especially in the coherent optics system, need two light beams to intersect sometimes.At this moment,, also to use second element except using the beam splitter, such as catoptron.By the adjusting of catoptron, reach the purpose that the angle of cut is regulated.But, do like this except making the system complexity increase, also to have brought systematic entirety decline, the problem of poor seismic behavior.Making to coherent experimental and holographic element brings certain trouble.
The purpose of this utility model provides a kind of novel light beam beam splitting arrangement, and it can be divided into two bundles with a branch of light, and intersects in a distance, and its angle of cut can be regulated continuously by rotating prism.
The utility model is realized above-mentioned purpose in two ways.First kind, promptly so-called reflection mode.When a branch of light incides on the prism, the two-beam of outgoing, a branch of is reflected light, another bundle is the light of outgoing after catadioptric.Rotate prism, change the incident angle of light beam, then reflected light produces different deviations with catadioptric light, thereby changes the angle of cut of two-beam.Second kind, so-called transmission mode.Two-beam all passes through catadioptric, and from the not coplanar outgoing of prism, along with the rotation of prism, two-beam produces different deviations, thereby causes the adjustable result of the two-beam angle of cut.
Structure of the present utility model as shown in Figure 1.Grind into one four prism by optical glass, ABCD and EFGH are the upper and lower bottom surface of prism, all the other four faces are optical surface, wherein two faces of ABFE and DCGH are not parallel, around the rib direction one drift angle arranged, among the upper bottom surface ABCD perpendicular to each rib, AB and CD are not parallel (for example, when with K9 glass, can make ∠ DAB=45 °, ∠ BCD=37.2 °).Face DCGH metal-coated membrane, face ABFE plates semi-transparent semi-reflecting film, and its saturating reciprocal coefficient is determined by actual operating position.
Two kinds of working method sub reflector mode and transmission modes, respectively by Fig. 2, Fig. 3 represents.
One, reflection mode:
The O point reflection of incident beam SO on incident surface A BEF forms the first bundle emergent light, and incident light forms deflecting light beams OE in prism simultaneously.It is reflected on the DCGH face, reflects prism by the BCGF face, forms the second bundle light.Above two-beam meets at a P, forms angle of cut θ.The relation of incident angle φ and two light beam angle of cut θ is by providing among the figure.
Two, transmission mode:
The O point of incident beam SO on incident surface A DHE injected prism, form refract light OM, M point part luminous energy on face ABFE penetrates prism, form the first bundle light, part luminous energy is reflected at the M point and forms light beam MN, secondary reflection again on the DCGH face reflects prism by the BCGF face thereafter, forms the second bundle light.Above two-beam intersects at the P point, and the angle of cut is θ.
Fig. 2, Fig. 3 have also expressed the relation of incident angle φ and two light beam angle of cut θ.Can select reflection or transmission mode to use according to the situation of actual optical system.
The utility model adopts a rotating prism, the two-beam outgoing is in same prism, simple in structure, easy to adjust, use this device can simplify the structure of optical system, the overall performance of improvement system has reduced because the two light beam phase differential shake that vibrations cause has improved dried contrast of penetrating striped.It can make larger aperture by the optical glass manufacturing simultaneously.
Claims (3)
1, a kind of adjustable angle of cut beam splitter prism that is made of four prisms, it is characterized in that: there is one group of uneven opposite side in the cross section perpendicular to this device rib.
2, adjustable angle of cut beam splitter prism according to claim 1 is characterized in that: contain on two uneven optical flats of above-mentioned not parallel opposite side the metal film that is coated with the semi-transparent semi-reflecting film of optics respectively and is all-trans.
3, adjustable angle of cut beam splitter prism according to claim 1, it is characterized in that: optical surface ABFE and ADHE all can be used as the plane of incidence, device when work, by rotating prism, regulate incident angle φ and reach the purpose of the two light beam angle of cut θ that regulate outgoing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242288 CN2175425Y (en) | 1993-10-21 | 1993-10-21 | Adjustable angle of skew prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242288 CN2175425Y (en) | 1993-10-21 | 1993-10-21 | Adjustable angle of skew prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2175425Y true CN2175425Y (en) | 1994-08-24 |
Family
ID=33816030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93242288 Expired - Fee Related CN2175425Y (en) | 1993-10-21 | 1993-10-21 | Adjustable angle of skew prism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2175425Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646956A (en) * | 2019-09-27 | 2020-01-03 | 中国科学院上海高等研究院 | Shear continuously adjustable birefringent beam splitter |
-
1993
- 1993-10-21 CN CN 93242288 patent/CN2175425Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646956A (en) * | 2019-09-27 | 2020-01-03 | 中国科学院上海高等研究院 | Shear continuously adjustable birefringent beam splitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |