CN1673707A - Large aperture linear array Hartmann wavefront sensor - Google Patents
Large aperture linear array Hartmann wavefront sensor Download PDFInfo
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- CN1673707A CN1673707A CN 200510031463 CN200510031463A CN1673707A CN 1673707 A CN1673707 A CN 1673707A CN 200510031463 CN200510031463 CN 200510031463 CN 200510031463 A CN200510031463 A CN 200510031463A CN 1673707 A CN1673707 A CN 1673707A
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Abstract
The present invention discloses one kind of large aperture linear array Hartmann wave front sensor, and aims at providing one kind of large aperture linear array Hartmann wave front sensor with convenient regulation, flexible configuration, good machining technological performance, low manufacture cost and no large aperture laser beam-expanding telescope. The large aperture linear array Hartmann wave front sensor includes micro cylindrical lens array, linear CCD detector array, stepped beam splitting reflector set before the micro cylindrical lens array to split the large aperture detected light beam, and synchronous driving circuit connected to the linear CCD detector array.
Description
Technical field
The invention belongs to a kind of Hartmann wave front sensor, be specifically related to a kind of large aperture linear array Hartmann wavefront sensor.
Background technology
Optical chromatography is a kind of advanced person's noncontact (intervention) method for quantitative measuring that transparent gas flow field density (temperature, component) distributes that obtains, these methods must adopt detector to obtain the data for projection of different angles direction, often select for use to have vibrating the Hartmann wave front sensor of insensitive advantage.In flow field laminar analysis measurement at a high speed, linear array Hartmann wavefront sensor is the desirable detector that obtains data for projection especially.
Existing a kind of high-velocity bed analysis system that adopts Hartmann wave front sensor as detector, it directly utilizes the aperture of line array CCD, the length of microlens array and linear array CCD camera coupling, the front is not provided with the laser bundle device that contracts, and measures the zone less than 3cm; Actual tested flow field spatial dimension is big (diameter range reaches 10cm) often, if directly adopt existing detector can only obtain the partial projection data, can't be reconstructed calculating.For accurate measurement, single direction projection needs the large-caliber laser bundle to cover, the method that contracts and restraint before can adopting existing linear array Hartmann wavefront sensor to receive is generally realized by the large-caliber laser beam expanding telescope (common so-called laser bundle-enlarging collimation device) of reverse placement.The large-caliber laser beam expanding telescope, because the laser-beam divergence angle is less, the aberration that proofread and correct is mainly a last spherical aberration and sinusoidal poor, so will adopt the aspheric surface simple lens, the processing cost height; If be applied to the measurement occasion of the exploring laser light of several different wave lengths, consider to reduce aberration; Make whole laser-beam-expanding telescope volume bigger like this, Installation and Debugging inconvenience.And, whole observation scope contracted restraint a microlens array and CCD camera aperture, improve measurement spatial resolution, palpus lenticular microlens array of greater number and more high-resolution CCD camera, the lenticular microlens array difficulty of processing of greater number is big, and processing technology and precision are wayward, and the high resolving power of CCD camera then is subjected to the restriction of current techniques, make to improve very difficulty of measurement spatial resolution.
Summary of the invention
Technical matters to be solved by this invention is the defective that overcomes above-mentioned prior art, provides a kind of light path debugging convenient, flexible configuration, and the spatial resolution height, processing technology is good, the large aperture linear array Hartmann wavefront sensor of low cost of manufacture.
The present invention is for solving the problems of the technologies described above the employing following technical proposals.A kind of large aperture linear array Hartmann wavefront sensor, comprise cylindrical microlenses array and line array CCD detector, it is characterized in that the stepped appearance that is provided with the beam splitting of heavy caliber detecting light beam divides beam reflector before the cylindrical microlenses array, this stepped appearance divides beam reflector by bonding the forming of plane mirror chunk more than two or two, it is the plane reflection face that described each plane mirror chunk has an end face, plane reflection face more than two or two is formed the stepped appearance reflecting surface, the quantity of described cylindrical microlenses array and line array CCD detector is identical with the quantity of plane mirror chunk, and the line array CCD detector is set in parallel in after the cylindrical microlenses array.
Described plane reflection face is 45 ° of reflectings surface, the optical axis angle at 45 of these 45 ° of reflectings surface and cylindrical microlenses array and line array CCD detector.
Described each line array CCD detector is connected with synchronous drive circuit.Synchronous drive circuit is to be connected in parallel by circuit by the output drive clock of outside universal timepiece generation circuit generation and output stage set to form, and each line array CCD detector is produced identical synchronized signal.
Line array CCD detector of the present invention can adopt Dalsa IL-P3-B Linear CCD Image Sensors, and picture dot is 512,1024,2048; Cylindrical microlenses array array number: 28 * 1, the sub-aperture size of each cylindrical microlenses: 602 μ m * 3mm cover 21 CCD picture dots, focal length: 30mm ± 2mm.Stepped appearance divides beam reflector by three bonding forming of plane mirror chunk, is respectively the first plane mirror chunk, the second plane mirror chunk, the 3rd plane mirror chunk.
Compared with prior art, beneficial effect of the present invention is: owing to do not use the large-caliber laser beam expanding telescope, and adopt easy to process and 45 ° of plane mirror chunks that precision is high are bonding forms, the stepped appearance of heavy caliber detecting light beam beam splitting can be divided beam steering mirror, the volume and the cost of system have been reduced, present optics processing technology is easy to guarantee the machining precision of level crossing, guarantees very small aberration.Because with dividing beam steering mirror with the beam splitting of heavy caliber detecting light beam, and have and to determine that according to the tested flow field spatial dimension of reality the plane mirror number of chunks is the advantage of beam splitting number, increased configuration flexibility, the zone of being surveyed by a line array CCD detector of the prior art is divided into several line array CCD detectors surveys, spatial resolution has been improved several times.The cylindrical microlenses array adopts cylindrical microlenses, and each small-bore cylinder microlens array and line array CCD are separately put, and makes things convenient for the light path debugging.The present invention also disposes common signal and reads and drive to realize that CCD exports synchronously, makes that the high speed image data are reliable.
In sum, the present invention has characteristics such as light path debugging convenience, flexible configuration, spatial resolution height, processing technology are good, low cost of manufacture.
The present invention is further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 divides the structural representation front view of beam reflector for stepped appearance;
Fig. 3 divides the structural representation right view of beam reflector for stepped appearance;
Fig. 4 is the structural representation front view of cylindrical microlenses array and line array CCD detector;
Fig. 5 is the structural representation right view of cylindrical microlenses array and line array CCD detector;
Fig. 6 is the synchronous drive circuit connection diagram of line array CCD detector.
Each label is represented among the figure:
1, heavy caliber detecting light beam 2, tested flow field 3, stepped appearance divide beam reflector
4, cylindrical microlenses array 5, line array CCD detector 6, the first plane mirror chunk
7, the second plane mirror chunk 8, the 3rd plane mirror chunk 9, reflecting surface.
Embodiment
Shown in Fig. 1～3, large aperture linear array Hartmann wavefront sensor of the present invention, comprise cylindrical microlenses array 4 and line array CCD detector 5, the stepped appearance that is provided with before cylindrical microlenses array 4 beam splitting of heavy caliber detecting light beam divides beam reflector 3, this stepped appearance divides the beam reflector 3 can be by bonding the forming of plane mirror chunk more than two or two, it is plane reflection face 9 that each plane mirror chunk has an end face, the length difference of each chunk, divide beam reflector 3 with bonding one-tenth stepped appearance, and form the stepped appearance reflecting surface by the plane reflection face 9 more than two or two.Present optics processing technology is easy to guarantee the machining precision of these plane mirror chunks, guarantees very small aberration.The quantity of cylindrical microlenses array 4 and line array CCD detector 5 is identical with the quantity of plane mirror chunk, and line array CCD detector 5 is set in parallel in after the cylindrical microlenses array 4.Above-mentioned plane reflection face 9 is 45 ° of reflectings surface, the optical axis angle at 45 of these 45 ° of reflectings surface and cylindrical microlenses array 4 and line array CCD detector 5.
The present invention divides beam reflector 3 that the beam splitting of heavy caliber detecting light beam is the divided beams identical with the plane mirror number of chunks by stepped appearance, can determine that the plane mirror number of chunks is the beam splitting number according to the tested flow field spatial dimension of reality, flexible configuration.In the present embodiment, the plane mirror chunk is set to three, is respectively the first plane mirror chunk 6, the second plane mirror chunk 7 and the 3rd plane mirror chunk 8; Correspondingly, the quantity of cylindrical microlenses array 4 and line array CCD detector 5 is three.Heavy caliber detecting light beam 1 is incident to stepped appearance with 45 ° of incident angles and divides beam reflector 3, be decomposed into three light beams through the first plane mirror chunk 6, the second plane mirror chunk 7 and the 3rd plane mirror chunk 8 with 45 ° of reflection angle reflections, be incident in corresponding the cylindrical microlenses array 4 and line array CCD detector 5 perpendicular to cylindrical microlenses array 4 respectively again, obtain data for projection.
The present invention adopts stepped appearance to divide beam reflector 3 with 1 beam splitting of heavy caliber detecting light beam, at interval determine (as shown in Figure 1, 2) by the interval D between each plane mirror chunk between each beam splitting, this interval D is determined according to the physical dimension of actual light path needs and cylindrical microlenses array 4, line array CCD detector 5.In the present embodiment, line array CCD detector 5 adopts the DalsaIL-P3-B Linear CCD Image Sensors, and spatial resolution selections such as 512,1024,2048 picture dots are arranged.Cylindrical microlenses array 4 array numbers: 28 * 1, the sub-aperture size of each cylindrical microlenses: 602 μ m * 3mm cover 21 CCD picture dots, focal length: 30mm+2mm.The interval D value is 3cm, then is spaced apart 3cm between each beam splitting.To each beam splitting, survey with small-bore cylindrical microlenses array 4 and line array CCD detector 5, this minute light beams perpendicular to small-bore cylinder microlens array 4 incidents, cylindrical microlenses array 4 is parallel with line array CCD detector 5, shown in Fig. 4,5.Divide the beam splitting of beam steering mirror to make each small-bore cylinder microlens array 4 and line array CCD detector 5 separately put, make things convenient for the light path debugging.Adopt each CCD to export synchronously simultaneously, guarantee that the pictorial data of high speed acquisition is reliable.The realization of the synchronous output of each line array CCD detector is to the identical synchronized signal of each ccd detector, the output drive clock and the output stage set that are produced the circuit generation by outside universal timepiece are connected in parallel by circuit, and each line array CCD detector is produced identical synchronized signal; As shown in Figure 6, produce output drive clock 1 Clock drive 1, output drive clock 2 Clock drive 2 and the output stage set Output reset that circuit produces by outside universal timepiece, be connected in parallel by circuit, give three line array CCD detectors 5 identical synchronized signal, realize that CCD exports synchronously.
The course of work of the present invention is: heavy caliber detecting light beam 1 passes 2 backs, tested flow field and is incident to stepped appearance with 45 ° of incident angles and divides beam reflector 3, divided beam reflector 3 to be decomposed into three light beams with 45 ° of reflection angle reflections by stepped appearance, be incident in corresponding the cylindrical microlenses array 4 and line array CCD detector 5 perpendicular to cylindrical microlenses array 4 respectively again through three plane mirror chunks.Be spaced apart 3cm between each beam splitting, D is that 3cm realizes among Fig. 2 by making when bonding stepped appearance divides beam reflector 3.Each beam splitting is surveyed by corresponding cylindrical microlenses array 4 and line array CCD detector 5.
Claims (7)
1, a kind of large aperture linear array Hartmann wavefront sensor, comprise cylindrical microlenses array and line array CCD detector, it is characterized in that the stepped appearance that is provided with the beam splitting of heavy caliber detecting light beam divides beam reflector before the cylindrical microlenses array, this stepped appearance divides beam reflector by bonding the forming of plane mirror chunk more than two or two, it is the plane reflection face that described each plane mirror chunk has an end face, plane reflection face more than two or two is formed the stepped appearance reflecting surface, the quantity of described cylindrical microlenses array and line array CCD detector is identical with the quantity of plane mirror chunk, and the line array CCD detector is set in parallel in after the cylindrical microlenses array.
2, large aperture linear array Hartmann wavefront sensor according to claim 1 is characterized in that described plane reflection face is 45 ° of reflectings surface, the optical axis angle at 45 of these 45 ° of reflectings surface and cylindrical microlenses array and line array CCD detector.
3, large aperture linear array Hartmann wavefront sensor according to claim 1 and 2 is characterized in that described each line array CCD detector is connected with synchronous drive circuit.
4, large aperture linear array Hartmann wavefront sensor according to claim 3, it is characterized in that described synchronous drive circuit is to produce output drive clock that circuit produces and output stage set by outside universal timepiece to be connected in parallel by circuit and to form, and produces identical synchronized signal to each line array CCD detector.
5, large aperture linear array Hartmann wavefront sensor according to claim 4 is characterized in that described line array CCD detector adopts Dalsa IL-P3-B Linear CCD Image Sensors, and picture dot is 512,1024,2048; Described cylindrical microlenses array array number: 28 * 1, the sub-aperture size of each cylindrical microlenses: 602 μ m * 3mm cover 21 CCD picture dots, focal length: 30mm ± 2mm.
6, large aperture linear array Hartmann wavefront sensor according to claim 5, it is characterized in that described stepped appearance divides beam reflector by three bonding forming of plane mirror chunk, is respectively the first plane mirror chunk, the second plane mirror chunk, the 3rd plane mirror chunk.
7, large aperture linear array Hartmann wavefront sensor according to claim 6, it is characterized in that the 3cm that is spaced apart between the plane reflection face on the described first plane mirror chunk and the second plane mirror chunk, be spaced apart 3cm between the plane reflection face on the second plane mirror chunk and the 3rd plane mirror chunk.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100314635A CN100449349C (en) | 2005-04-20 | 2005-04-20 | Large aperture linear array Hartmann wavefront sensor |
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| CNB2005100314635A CN100449349C (en) | 2005-04-20 | 2005-04-20 | Large aperture linear array Hartmann wavefront sensor |
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| CN1673707A true CN1673707A (en) | 2005-09-28 |
| CN100449349C CN100449349C (en) | 2009-01-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100573064C (en) * | 2006-01-16 | 2009-12-23 | 中国科学院光电技术研究所 | Hartmann wave front sensor based on visual field offset of beam splitter prism |
| CN102914373A (en) * | 2012-11-20 | 2013-02-06 | 天津理工大学 | Hartmann wave-front sensor based on micro-cylindrical lens array |
| CN108344507A (en) * | 2017-12-26 | 2018-07-31 | 湖北航天技术研究院总体设计所 | A kind of performance testing device and method of Spectral beam combining system |
| CN111796302A (en) * | 2020-07-03 | 2020-10-20 | 中国科学院合肥物质科学研究院 | Trapezoidal lens-based multi-designated-height CCD imaging system and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5229889A (en) * | 1991-12-10 | 1993-07-20 | Hughes Aircraft Company | Simple adaptive optical system |
| JPH0821964A (en) * | 1994-07-05 | 1996-01-23 | Hitachi Ltd | Control method of shape variable mirror and compensation optical device |
| US5777719A (en) * | 1996-12-23 | 1998-07-07 | University Of Rochester | Method and apparatus for improving vision and the resolution of retinal images |
| US6575572B2 (en) * | 2001-09-21 | 2003-06-10 | Carl Zeiss Ophthalmic Systems, Inc. | Method and apparatus for measuring optical aberrations of an eye |
| CN1207548C (en) * | 2002-06-24 | 2005-06-22 | 中国科学院光电技术研究所 | Hartmann wavefront sensor with adjustable light spot array arrangement |
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- 2005-04-20 CN CNB2005100314635A patent/CN100449349C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100573064C (en) * | 2006-01-16 | 2009-12-23 | 中国科学院光电技术研究所 | Hartmann wave front sensor based on visual field offset of beam splitter prism |
| CN102914373A (en) * | 2012-11-20 | 2013-02-06 | 天津理工大学 | Hartmann wave-front sensor based on micro-cylindrical lens array |
| CN108344507A (en) * | 2017-12-26 | 2018-07-31 | 湖北航天技术研究院总体设计所 | A kind of performance testing device and method of Spectral beam combining system |
| CN111796302A (en) * | 2020-07-03 | 2020-10-20 | 中国科学院合肥物质科学研究院 | Trapezoidal lens-based multi-designated-height CCD imaging system and method |
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| CN100449349C (en) | 2009-01-07 |
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