CN204086803U - A kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type - Google Patents
A kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type Download PDFInfo
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- CN204086803U CN204086803U CN201420459998.7U CN201420459998U CN204086803U CN 204086803 U CN204086803 U CN 204086803U CN 201420459998 U CN201420459998 U CN 201420459998U CN 204086803 U CN204086803 U CN 204086803U
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Abstract
The utility model openly provides a kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type, comprising: directional light collimator objective group, image-forming objective lens group, light splitting n pyramid and n CCD target surface, wherein, and n >=8; N overlap inputted restraints laser after shadow graph successively by directional light collimator objective group, image-forming objective lens group and light splitting n pyramid, light splitting n pyramid is restrainted laser beam to n and is divided into n road equably, carries out blur-free imaging respectively on n CCD target surface to the imaging facula of target.Adopt the technical solution of the utility model, make the amplitude-frequency of hypervelocity laser shadowgraph imaging reach ten million width/more than second, meet hypervelocity laser shadowgraph imaging requirement of experiment.
Description
Technical field
The utility model relates to a kind of hypervelocity laser shadowgraph imaging technical field, particularly relates to a kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type.
Background technology
The framing camera that modern science and technology research needs performance higher.In order to promote further developing of science and technology, each developed country of the world has developed novel high speed camera-very high speed digital framing camera that temporal resolution can reach a few nanosecond.It can provide the two-dimensional space information of High-speed transient process, can the development trend of solution preocess and the motion process of object from sequence image, very intuitively, has the irreplaceable advantage of alternate manner.
At present, very high speed digital framing camera generally uses digital type high speed ICCD camera (infrared camera), digital type high speed ICCD camera employs microchannel plate technology, what the usual imaging system of the digital camera of the type adopted is light beam four tunnel light splitting, recycling microchannel plate break-make controls the break-make of the 5th road to the 8th road light beam and the exposure etc. of ICCD, due on an ICCD target surface repeatedly imaging time, need the image information shifting previous acquisition from ICCD, and reach 300 nanoseconds more than this transfer time, the while of causing this kind of camera more than eight width images during imaging, amplitude-frequency is only millions of width/second.When carrying out hypervelocity laser shadowgraph imaging, because test visual field only has 100mm-200mm, and the object variations time of test only had for tens nanoseconds, all sequence images that will obtain several in effective field range, the amplitude-frequency of framing camera is needed to reach ten million width/more than second, could testing requirement be met.Current digital type high speed ICCD camera cannot hypervelocity laser shadowgraph imaging requirement of experiment.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of hypervelocity laser sequence shadowgraph imaging device based on light splitting pyramid-type, makes the amplitude-frequency of hypervelocity laser shadowgraph imaging reach ten million width/more than second, meet hypervelocity laser shadowgraph imaging requirement of experiment.
Hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type comprises: directional light collimator objective group, image-forming objective lens group, light splitting n pyramid and a n CCD target surface, wherein, and n >=8; N overlap inputted restraints laser after shadow graph successively by directional light collimator objective group, image-forming objective lens group and light splitting n pyramid, light splitting n pyramid is restrainted laser beam to n and is divided into n road equably, carries out blur-free imaging respectively on n CCD target surface to the imaging facula of target.
A kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type, described directional light collimator objective group comprises: Entry pupil diameters be 20mm-60mm and focal length be 156.14mm biconvex lens, Entry pupil diameters is 20mm-60mm and focal length is 177.85mm biconvex lens, two biconvex lens are arranged in lens barrel unit, ensure there is 3mm clearance band between lens and lens; Described image-forming objective lens group comprises: Entry pupil diameters is 20mm-60mm and focal length 125.76mm biconvex lens, Entry pupil diameters 20mm-60mm and focal length is the concavees lens of 2427.52mm, two lens are arranged in lens barrel unit, ensure there is 3mm clearance band between lens and lens.
The n that overlap inputs by the utility model restraints laser and be divided into n road equably by directional light collimator objective group, image-forming objective lens group and light splitting n pyramid successively after shadow graph, sharply defined image is become respectively on n CCD target surface, to realize hypervelocity sequence photograph, by controlling the LASER Light Source bright dipping sequential time, make the amplitude-frequency of framing camera reach ten million width/second, even the amplitude-frequency of framing camera can be reached hundred million width/second by the pulse width time controlling laser source system.Avoid existing on an ICCD target surface repeatedly imaging time, need to shift the image information of previous acquisition from ICCD.
Accompanying drawing explanation
Fig. 1 is hypervelocity sequence laser shadowgraph imaging device light path arrangement figure of the present utility model.
1. shadow graph knife-edge positions, 2. directional light collimator objective group in figure, 3. once as, 4. image-forming objective lens group, 5. light splitting n pyramid, 6. two pictures, 7.CCD.
Embodiment
The utility model provides a kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type to comprise: the target surface 7, n >=8 of directional light collimator objective group 2, image-forming objective lens group 4, light splitting n pyramid 5 and n CCD (regular camera).
Described directional light collimator objective group 2 comprises: Entry pupil diameters be 20mm-60mm and focal length be 156.14mm biconvex lens, Entry pupil diameters is 20mm-60mm and focal length is 177.85mm biconvex lens, two biconvex lens are arranged in lens barrel unit, ensure 3mm clearance band between lens and lens.Described image-forming objective lens group 4 comprises: Entry pupil diameters is 20mm-60mm and focal length 125.76mm biconvex lens, Entry pupil diameters 20mm-60mm and focal length is the concavees lens of 2427.52mm, two lens are arranged in lens barrel unit, ensure 3mm clearance band between lens and lens;
Divergent beams are constrained to parallel beam and enter image-forming objective lens group by directional light collimator objective group, and image-forming objective lens group is converged to picture to parallel beam.Meanwhile, by directional light collimator objective and image-forming objective lens group, the aberration to system light path corrects light beam.
N overlap inputted restraints laser after shadow graph successively by directional light collimator objective group 2, image-forming objective lens group 4 and light splitting n pyramid 5, light splitting n pyramid 5 couples of n restraint laser beam and are divided into n road equably, carry out blur-free imaging on the surface respectively at n CCD7 to the imaging facula of target.
N overlap inputted restraints laser first through shadow graph knife-edge positions 1, and after knife-edge positions, place directional light collimator objective group 2, directional light collimator objective group 2 take knife-edge positions as object plane, is directional light by its outgoing laser beams collimation; Directional light collimator objective group 2 formed below target shadow object plane once as.Form the secondary picture of target shadow object plane again through image-forming objective lens group 4, form target edge of a knife picture below in image-forming objective lens group 4.In target edge of a knife image position can by light splitting n pyramid 5 by each road beam reflection to different direction, then by CCD7 can gather respectively each road outgoing beam form the picture of target shadow object plane.
The embodiment of just this utility model described in instructions.Although describe embodiment of the present utility model by reference to the accompanying drawings, in this area, those skilled in the art can make various distortion or amendment within the scope of the appended claims.
Claims (2)
1. the hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type, it is characterized in that, comprise: directional light collimator objective group (2), image-forming objective lens group (4), light splitting n pyramid (5) and n CCD target surface (7), wherein, n >=8; N overlap inputted restraints laser after shadow graph successively by directional light collimator objective group (2), image-forming objective lens group (4) and light splitting n pyramid (5), light splitting n pyramid (5) is restrainted laser beam to n and is divided into n road equably, carries out blur-free imaging respectively on n CCD target surface (7) to the imaging facula of target.
2. a kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type as claimed in claim 1, it is characterized in that, described directional light collimator objective group (2) comprising: Entry pupil diameters be 20mm-60mm and focal length be 156.14mm biconvex lens, Entry pupil diameters is 20mm-60mm and focal length is 177.85mm biconvex lens, two biconvex lens are arranged in lens barrel unit, ensure there is 3mm clearance band between lens and lens; Described image-forming objective lens group (4) comprising: Entry pupil diameters is 20mm-60mm and focal length 125.76mm biconvex lens, Entry pupil diameters 20mm-60mm and focal length is the concavees lens of 2427.52mm, two lens are arranged in lens barrel unit, ensure there is 3mm clearance band between lens and lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420459998.7U CN204086803U (en) | 2014-08-08 | 2014-08-08 | A kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type |
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| CN201420459998.7U CN204086803U (en) | 2014-08-08 | 2014-08-08 | A kind of hypervelocity sequence laser shadowgraph imaging device based on light splitting pyramid-type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730855A (en) * | 2014-08-08 | 2015-06-24 | 中国空气动力研究与发展中心超高速空气动力研究所 | Superspeed sequence laser shadow imaging device based on beam split pyramid type |
| CN108828895A (en) * | 2018-05-31 | 2018-11-16 | 航天东方红卫星有限公司 | A kind of optical imaging system and superelevation frame frequency imaging method based on Amici prism |
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2014
- 2014-08-08 CN CN201420459998.7U patent/CN204086803U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730855A (en) * | 2014-08-08 | 2015-06-24 | 中国空气动力研究与发展中心超高速空气动力研究所 | Superspeed sequence laser shadow imaging device based on beam split pyramid type |
| CN108828895A (en) * | 2018-05-31 | 2018-11-16 | 航天东方红卫星有限公司 | A kind of optical imaging system and superelevation frame frequency imaging method based on Amici prism |
| CN108828895B (en) * | 2018-05-31 | 2020-08-14 | 航天东方红卫星有限公司 | Optical imaging system based on beam splitter prism and ultrahigh frame frequency imaging method |
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