CN102096091B - Particle field optical holographic high-precision reproduction collecting system and method - Google Patents
Particle field optical holographic high-precision reproduction collecting system and method Download PDFInfo
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- CN102096091B CN102096091B CN201110002074A CN201110002074A CN102096091B CN 102096091 B CN102096091 B CN 102096091B CN 201110002074 A CN201110002074 A CN 201110002074A CN 201110002074 A CN201110002074 A CN 201110002074A CN 102096091 B CN102096091 B CN 102096091B
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Abstract
The invention relates to a particle field optical holographic high-precision reproduction collecting system and a particle field optical holographic high-precision reproduction collecting method. A beam expanding alignment unit, a particle field information carrier, an imaging lens, and a charge coupled device (CCD) are arranged on the output optical path of a laser in turn, and the CCD is connected with a computer; the sensitive face of the CCD is positioned at the rear focusing face of the imaging lens; the particle field information carrier is a holographic photographic plate carrying particle field information; a carrier positioning and moving device comprises a three-dimensional translation platform; a CCD positioning and moving device comprises a one-dimensional translation platform and a lens focusing face positioning device; the lens focusing face positioning device comprises a positioning part and a standard partition plate; and the standard partition plate is arranged on one end face of the positioning part, while the other part of the positioning part is connected with an object face side of the imaging lens. The device and the method solve the problems of low efficiency and low precision of the conventional optical path adjustment and low final data precision of the system caused thereby, realize accurate adjustment to the system optical path according to the lens imaging principle and improve the final data precision of the system.
Description
Technical field
The present invention relates to a kind of image optics diagnostic system and method, be specifically related to a kind of Particle Field optical holography and reproduce acquisition system and method.
Background technology
Particle Field holographic diagnostics technology possesses advantages such as noncontact, high precision, the test space are big, and particularly it can directly provide the three-dimensional information of Particle Field, has become the standard method that Particle Field is measured.The reproduction collection of Particle Field is a requisite link in the Particle Field optical holography diagnostic techniques.The holographic interference pattern of record Particle Field information obtains the 3-d reproduction picture of primary particle field through optical reproduction, accepts the reproduced image of each aspect of Particle Field and its input computing machine is stored and post-processed with CCD, and this process is called the reproduction collection of Particle Field.
Because mostly the particle of Particle Field diagnosis is the small-particle of micron dimension,, to the reproduction Particle Field be imaged onto the CCD sensitive face again after imaging len amplifies usually and accepts for satisfying the resolution requirement of picture receiver spare CCD.Because the Particle Field diagnosis requirement quantitatively provides parameters such as the yardstick that reproduces particle and locus, therefore before IMAQ begins, the sensitive face that must will reproduce reference field and the CCD of Particle Field accurately navigates to the front focal plane and the back focal plane place of imaging len respectively.
Because there are the exterior mechanical interface unit in imaging len and CCD sensitive face, directly can't accurately confirm the position of holographic dry plate and CCD in the experiment through linear measure longimetry.Particle Field optical holography in current use reproduces in the acquisition system, earlier according to imaging len given object distance and image distance, places holographic dry plate and CCD roughly usually, and then fine adjustments.The foundation of its adjusting is: the front focal plane that accurately navigates to imaging len respectively when the sensitive face of reference field that reproduces Particle Field and CCD is during with back focal plane, and the reproduction of standard silk is as clear and its enlargement factor is identical with the enlargement factor that imaging len designs use on the reference field.Because adjustment process not have fixing reference, and the sharpness of picture has direct influence to the accuracy of measurement of picture size, makes just blindness very of adjustment process, and it is many not only to expend time in, and bearing accuracy is low, has influenced system's final data precision.
For fear of blindness, to increase work efficiency, another kind of way is: the sensitive face of estimation CCD in conjunction with the set-point of lens image distance, is directly confirmed the position of CCD to the distance of its mechanical interface through linear measure longimetry; Sensitive face with CCD is the back focal plane of lens again, according to the lens imaging principle, confirms the position of holographic dry plate through the reproduction image sharpness of standard silk on the interpretation reference field.In this way,, make that the location of CCD is accurate inadequately, the deviation of mm magnitude is often arranged, reduced system's final data precision owing to have estimation error and linear measure longimetry error.
Summary of the invention
Reproduce the low problem of system's final data precision that the efficient that light path is regulated in the acquisition technique is low, precision is low and cause in order to solve existing Particle Field optical holography; The invention provides a kind of Particle Field optical holography high precision and reproduce the system and method for gathering; By the lens focal plane locating device; According to lens imaging principle Rapid Realization the accurate adjusting of system light path, improved system's final data precision.
Technical solution of the present invention is:
A kind of Particle Field optical holography high precision is reproduced acquisition system, comprises laser instrument 1, beam-expanding collimation device 2, Particle Field information carrier, carrier location and mobile device, imaging len 5, CCD7, CCD location and mobile device, computing machine 9; Said beam-expanding collimation device 2, Particle Field information carrier, imaging len 5, CCD7 are successively set on the output light path of laser instrument 1, and said CCD7 links to each other with computing machine 9; The sensitive face of said CCD7 is arranged on imaging len 5 back focal plane places; Said Particle Field information carrier is the holographic dry plate 3 that carries Particle Field information; Said carrier location and mobile device comprise that being used for the Particle Field information carrier installs and move the D translation platform of controlling 4; Said CCD location and mobile device comprise that being used for CCD installs the one dimension translation stage 8 that reaches mobile control, and its special character is: said CCD location and mobile device also comprise the lens focal plane locating device; Said lens focal plane locating device comprises positioning element 6 and standard graticule 10; Said standard graticule is installed in an end face of positioning element 6, and the other end of said positioning element 6 is connected with the object plane side of imaging len 5; Said positioning element is used to guarantee that the photoetching face of standard graticule 10 is positioned at the front focal plane of imaging len 5.
Above-mentioned standard graticule 10 preferably is fixedly connected with positioning element 6; Above-mentioned positioning element 6 best and imaging len 5 flexible connections.
Above-mentioned positioning element 6 preferred cannulated sleeves.
A kind of Particle Field optical holography high precision is reproduced acquisition method, may further comprise the steps:
1] image is accepted the accurate location of device CCD, and concrete steps are following:
1.1] on the light path of laser instrument 1 output, set gradually beam-expanding collimation device 2 and imaging len 5, and imaging len 5 is fixing;
1.2] at the object plane side lens mounting focal plane locating device of imaging len 5; Said lens focal plane locating device comprises positioning element 6 and standard graticule 10; Said standard graticule is installed in an end face of positioning element, and the other end of said positioning element is connected with the object plane side of imaging len; Said positioning element is used to guarantee that the photoetching face of standard graticule 10 is positioned at the front focal plane of imaging len 5;
1.3] CCD7 is installed on the one dimension translation stage 8; And CCD is arranged near imaging len 5 back focal planes on laser instrument 1 output light path; And CCD is connected with computing machine 9, move CCD7 along optical axis direction then, simultaneously on computers on the photoetching face of interpretation standard graticule 10 homologous lines on CCD, becoming the quality of image; When clear picture, CCD is fixed, then the sensitive face of CCD7 is positioned the back focal plane place of imaging len;
2] confirm the axial initial acquisition position of Particle Field and the reference zero of axial coordinate, concrete steps are following:
2.1] the lens focal plane locating device on the imaging len 5 pulled down take away;
2.2] holographic dry plate 3 that will be loaded with Particle Field information is installed on the D translation platform 4; And holographic dry plate 3 is arranged near imaging len 5 front focal planes on laser instrument 1 output light path; Move holographic dry plate along optical axis direction then, the picture of standard silk on CCD on the Particle Field reference field reproduced in interpretation on computers simultaneously, when clear picture; The axial coordinate of recording holographic dry plate is as the axial initial acquisition position of Particle Field and the reference zero of axial coordinate;
3] collection of particle field picture: move holographic dry plate 3 through D translation platform 4 orders and carry out the Particle Field IMAQ, accomplish up to all images collection.
Above-mentioned D translation platform is the three dimensions mobile platform of step-length 0.1 μ m; Above-mentioned one dimension translation stage is the one-dimensional space mobile platform of step-length 0.1 μ m.
Advantage of the present invention:
1, core feature of the present invention is to have designed a lens focal plane locating device (cannulated sleeve); This device is with the exact position of the photoetching face sign lens front focal plane of standard graticule; And then the accurate location of having accomplished CCD by the standard graticule according to the lens imaging principle fast; Realize the accurate adjusting of system light path, guaranteed system's final data precision.The invention solves the problem that efficient is low, precision is low and system's final data precision is low that light path is regulated in the prior art.
2, standard graticule 10 of the present invention is fixedly connected the problem that can avoid occurring the reseting precision difference with cannulated sleeve.
Description of drawings
Fig. 1 is the principle schematic that Particle Field optical holography high precision of the present invention is reproduced acquisition method;
Fig. 2 is a step 1 in the implementation method of the present invention] scheme of installation;
Fig. 3 is a step 2 in the implementation method of the present invention] scheme of installation;
Fig. 4 is the structural representation that is connected of lens focal plane locating device and lens among the present invention;
Among the figure, 1-laser instrument, 2-beam-expanding collimation device, 3-holographic dry plate, 4-D translation platform, 5-imaging len, 6-positioning element, 7-CCD, 8-one dimension translation stage, 9-computing machine, 10-standard graticule.
Embodiment
Particle Field optical holography high precision of the present invention is reproduced acquisition system, comprises laser instrument 1, beam-expanding collimation device 2, Particle Field information carrier, carrier location and mobile device, imaging len 5, CCD7, CCD location and mobile device, computing machine 9; The Particle Field information carrier is the holographic dry plate 3 that carries Particle Field information; Carrier location and mobile device comprise that being used for the Particle Field information carrier installs and move the D translation platform of controlling 4; CCD location and mobile device comprise that being used for CCD installs and move one dimension translation stage 8 and the lens focal plane locating device of controlling; The lens focal plane locating device comprises positioning element 6 and standard graticule 10, and positioning element 6 is a cannulated sleeve; Beam-expanding collimation device 2, holographic dry plate 3, imaging len 5, CCD7 are successively set on the output light path of laser instrument 1, and CCD7 links to each other with computing machine 9; The sensitive face of CCD7 is arranged on imaging len 5 back focal plane places; The standard graticule is fixedly mounted on an end face of cannulated sleeve, and the object plane side of the other end of cannulated sleeve and imaging len 5 flexibly connects; Cannulated sleeve is used to guarantee that the photoetching face of standard graticule 10 is positioned at the front focal plane of imaging len 5.
During system light path is regulated, earlier the lens focal plane locating device is installed in the object plane side of imaging len, the sensitive face of CCD is regulated being arranged on imaging len back focal plane place; Again the lens focal plane locating device is pulled down and taken away, the holographic dry plate that carries Particle Field information is placed on the front focal plane vicinity of imaging len, and regulate its position and make the standard silk blur-free imaging that reproduces on the Particle Field reference field on CCD.
The principle of work of system of the present invention is: will reproduce Particle Field through imaging len and be imaged on image and accept on the device CCD, after will accept picture input computing machine to accomplish treatment of picture and storage.
The job step of system of the present invention is:
Step 1, at first the sensitive face of CCD accurately is positioned the back focal plane place of imaging len.
Concrete steps are: on the output light path of laser instrument 1, establish beam-expanding collimation device 2; On the output light path of beam-expanding collimation device 2, be set as picture lens 5; And imaging len 5 is fixed on the optics guide rail, the lens focal plane locating device comprises cannulated sleeve and standard graticule 10; The standard graticule is fixedly mounted on an end face of cannulated sleeve, and the other end of cannulated sleeve and imaging len flexibly connect; Through pre-determined cannulated sleeve axial dimension, can make the photoetching face of the standard graticule that is installed in the cannulated sleeve other end be in the front focal plane place of imaging len 5; In the back focal plane vicinity of imaging len 5 CCD7 is set then, and CCD7 is installed on the one dimension translation stage 8, CCD7 is gone up the image input computing machine of accepting 9, the picture quality of the 6th group of 6 pairs of lines on the photoetching face of interpretation standard graticule on the computing machine 9.Move the position of CCD7 on optical axis through one dimension translation stage 8, when clear picture, CCD7 is fixed.In fact the right picture quality of which line of interpretation have relation with the pixel of the CCD that adopts, and pixel is high more to become the demand pairs of sharply defined image big more.
Step 2, the axial initial acquisition position of confirming Particle Field and the reference zero of axial coordinate.
Concrete steps are: with taking away under the dismounting of the lens focal plane locating device in step 1 light path; The holographic dry plate 3 that is loaded with Particle Field information is set at the front focal plane place that is approximately imaging len 5; And holographic dry plate 3 is installed on the D translation platform 4; Form the reproduction real image and the reproduction virtual image of tested Particle Field and standard silk at symmetric position place, holographic dry plate 3 front and back, it reproduces real image and is imaged on the CCD7 picture of interpretation standard silk on computing machine 9 through imaging len 5; Regulate the position of holographic dry plate 3 on optical axis through D translation platform 4; When standard silk clear picture, the axial coordinate of recording holographic dry plate 3 is as the axial initial acquisition position of Particle Field and the reference zero of axial coordinate.
Concrete steps are: move holographic dry plate 3 through D translation platform 4 orders and carry out the Particle Field IMAQ, accomplish up to all images collection.
Wherein: laser instrument 1 is a continuous semiconductor pumping Nd:YAG LASER Light Source; Beam-expanding collimation device 2 is optical devices that an ability is restrainted the output light expansion of Nd:YAG laser instrument and be collimated into directional light; Be loaded with the holographic interference pattern that record Particle Field information is arranged on the holographic dry plate 3 of Particle Field information; D translation platform 4 can realize that by computer control the three dimensions of step-length 0.1 μ m moves; Imaging len 5 has the little depth of field and constant enlargement factor; One end of lens focal plane locating device can accurately be installed in the object plane side of imaging len 5, and its other end is installed with the standard graticule, and the photoetching face of standard graticule is used to indicate the exact position of imaging len 5 front focal planes; CCD7 is that a kind of image is accepted device, and its pixel size is 7.9 μ m; One dimension translation stage 8 can realize that by computer control the one-dimensional space of step-length 0.1 μ m moves; The IMAQ Control Software is installed on the computing machine 9.
Provide the exact position of lens front focal plane in the step 1 of the present invention by the lens focal plane locating device, thereby, realized that image accepts the accurate location of device CCD according to the lens imaging principle; With CCD accurately orientate the basis as, according to the lens imaging principle, accurately provided the reference zero of Particle Field axial coordinate through step 2.
Claims (5)
1. a Particle Field optical holography high precision is reproduced acquisition system, comprises laser instrument (1), beam-expanding collimation device (2), Particle Field information carrier, carrier location and mobile device, imaging len (5), CCD (7), CCD location and mobile device, computing machine (9); Said beam-expanding collimation device (2), Particle Field information carrier, imaging len (5), CCD (7) are successively set on the output light path of laser instrument (1), and said CCD (7) links to each other with computing machine (9); The sensitive face of said CCD (7) is arranged on imaging len (5) back focal plane place; Said Particle Field information carrier is the holographic dry plate (3) that carries Particle Field information; Said carrier location and mobile device comprise that being used for the Particle Field information carrier installs and move the D translation platform of controlling (4); Said CCD location and mobile device comprise that being used for CCD installs and move the one dimension translation stage of controlling (8);
It is characterized in that:
Said CCD location and mobile device also comprise the lens focal plane locating device;
Said lens focal plane locating device comprises positioning element (6) and standard graticule (10); Said standard graticule is installed in an end face of positioning element (6), and the other end of said positioning element (6) is connected with the object plane side of imaging len (5); Said positioning element is used to guarantee that the photoetching face of standard graticule (10) is positioned at the front focal plane of imaging len (5).
2. Particle Field optical holography high precision according to claim 1 is reproduced acquisition system, and it is characterized in that: said standard graticule (10) is fixedly connected with positioning element (6); Said positioning element (6) flexibly connects with imaging len (5).
3. Particle Field optical holography high precision according to claim 1 and 2 is reproduced acquisition system, and it is characterized in that: said positioning element (6) is a cannulated sleeve.
4. a Particle Field optical holography high precision is reproduced acquisition method, it is characterized in that: may further comprise the steps:
1] image is accepted the accurate location of device CCD, and concrete steps are following:
1.1] on the light path of laser instrument (1) output, set gradually beam-expanding collimation device (2) and imaging len (5), and imaging len (5) is fixing;
1.2] at the object plane side lens mounting focal plane locating device of imaging len (5); Said lens focal plane locating device comprises positioning element (6) and standard graticule (10); Said standard graticule is installed in an end face of positioning element, and the other end of said positioning element is connected with the object plane side of imaging len; Said positioning element is used to guarantee that the photoetching face of standard graticule (10) is positioned at the front focal plane of imaging len (5);
1.3] CCD (7) is installed on the one dimension translation stage (8); And CCD is arranged near imaging len (5) back focal plane on laser instrument (1) output light path; And CCD is connected with computing machine (9), move CCD along optical axis direction then, simultaneously on computers on the photoetching face of interpretation standard graticule (10) homologous lines on CCD, becoming the quality of image; When clear picture, CCD is fixed, then the sensitive face of CCD is positioned the back focal plane place of imaging len;
2] confirm the axial initial acquisition position of Particle Field and the reference zero of axial coordinate, concrete steps are following:
2.1] the lens focal plane locating device on the imaging len (5) pulled down take away;
2.2] holographic dry plate (3) that will be loaded with Particle Field information is installed on the D translation platform (4); And holographic dry plate (3) is arranged near imaging len (5) front focal plane on laser instrument (1) output light path; Move holographic dry plate along optical axis direction then, the picture of standard silk on CCD on the Particle Field reference field reproduced in interpretation on computers simultaneously, when clear picture; The axial coordinate of recording holographic dry plate is as the axial initial acquisition position of Particle Field and the reference zero of axial coordinate;
3] collection of particle field picture: move holographic dry plate (3) through D translation platform (4) order and carry out the Particle Field IMAQ, accomplish up to all images collection.
5. Particle Field optical holography high precision according to claim 4 is reproduced acquisition method, and it is characterized in that: described D translation platform is the three dimensions mobile platform of step-length 0.1 μ m; Described one dimension translation stage is the one-dimensional space mobile platform of step-length 0.1 μ m.
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| CN201110002074A CN102096091B (en) | 2011-01-06 | 2011-01-06 | Particle field optical holographic high-precision reproduction collecting system and method |
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Families Citing this family (3)
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| CN104034636B (en) * | 2014-06-05 | 2016-05-04 | 哈尔滨工程大学 | Based on Particle Field measurement mechanism and the measuring method of digital micro-mirror planar structure optical illumination |
| CN107688284B (en) * | 2017-08-29 | 2024-03-12 | 西北核技术研究所 | Particle field holographic on-axis and off-axis reproduction light path system and method |
| CN108020509A (en) * | 2017-12-12 | 2018-05-11 | 佛山科学技术学院 | The method and its device of a kind of optical projection tomography |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003098040A (en) * | 2001-09-25 | 2003-04-03 | Ricoh Co Ltd | Optical system evaluation device and method |
| CN1464288A (en) * | 2002-06-05 | 2003-12-31 | 中国科学技术大学 | Particle field total-field measurement process and apparatus based on laser sheet optical image-forming |
| JP2008129073A (en) * | 2006-11-16 | 2008-06-05 | Nippon Hoso Kyokai <Nhk> | Hologram recording and reproducing device |
| WO2008127410A2 (en) * | 2006-11-07 | 2008-10-23 | New York University | Holographic microfabrication and characterization system for soft matter and biological systems |
| CN101788782A (en) * | 2010-01-06 | 2010-07-28 | 中国工程物理研究院流体物理研究所 | Double coaxial transient laser holographic recording system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003098040A (en) * | 2001-09-25 | 2003-04-03 | Ricoh Co Ltd | Optical system evaluation device and method |
| CN1464288A (en) * | 2002-06-05 | 2003-12-31 | 中国科学技术大学 | Particle field total-field measurement process and apparatus based on laser sheet optical image-forming |
| WO2008127410A2 (en) * | 2006-11-07 | 2008-10-23 | New York University | Holographic microfabrication and characterization system for soft matter and biological systems |
| JP2008129073A (en) * | 2006-11-16 | 2008-06-05 | Nippon Hoso Kyokai <Nhk> | Hologram recording and reproducing device |
| CN101788782A (en) * | 2010-01-06 | 2010-07-28 | 中国工程物理研究院流体物理研究所 | Double coaxial transient laser holographic recording system |
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