CN2727813Y - Large-view-field digital holographic imaging device - Google Patents
Large-view-field digital holographic imaging device Download PDFInfo
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- CN2727813Y CN2727813Y CN 200420082611 CN200420082611U CN2727813Y CN 2727813 Y CN2727813 Y CN 2727813Y CN 200420082611 CN200420082611 CN 200420082611 CN 200420082611 U CN200420082611 U CN 200420082611U CN 2727813 Y CN2727813 Y CN 2727813Y
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Abstract
A large field of view digital holographic imaging device comprising a laser light source, characterized by the further steps of: the device comprises a beam expanding telescope, a beam splitter, two total reflectors, a semi-transparent semi-reflective mirror, a lens, a sample to be detected, a detector, a movable platform and a computer. The positional relationship of the components is as follows: a beam expanding telescope and a beam splitter are arranged on a laser output light path of a laser light source, A beam in two output light beams (A, B) of the beam splitter irradiates a sample to be detected, the output end of the sample to be detected is a total reflector and a semi-transparent semi-reflective mirror, a converging lens, a detector and a computer are arranged in the output direction, a light beam (B) enters the converging lens and the detector through the reflection of the other total reflector and the other semi-transparent semi-reflective mirror and meets the light beam A to generate a hologram, and the hologram is stored in the computer for reconstruction. Compared with the prior art, the utility model, resolution ratio and angle of vision have increased an order of magnitude, have established the basis for the holographic wide application of digit.
Description
Technical field:
The utility model is about Digital Holography, particularly a kind of big visual field numeral holographic imaging device.
Background technology:
Digital holography is a kind ofly to come recorded hologram with the CCD charge-coupled device as detector, and converts numeral to through the A/D plate, stores in the computing machine, and replaces the reconstruct that optical diffraction is finished hologram with digital fourier transformation.Because digital holography adopts the CCD record to replace needing photographic plate recording in the early stage holography, avoided those numerous and diverse operating process in the dark place, and can obtain real-time reconstruct, thereby digital holography has obtained development fast in recent years.Making us feeling not enough is that the resolution of charge-coupled device CCD is not high, the minimum unit that it can be differentiated is approximately about 20 μ m, when therefore making the recording medium of optical holography with CCD, angle between thing bundle and the reference bundle often is limited within 1～2 degree scope, not only resolution is not high, and the field angle of hologram is also very little.
Summary of the invention:
In order to overcome the deficiency of technology formerly, a kind of big visual field numeral holographic imaging device is proposed, to improve the field angle of its resolution and hologram.
Basic thought of the present utility model is: the method for synthetic hologram is transplanted to digital holography, mobile CCD divides the segment record digital hologram, after several hologram recordings record, use the method for synthetic hologram again, hologram is synthetic [referring to formerly technology: Yu Meiwen is outstanding, light is holographic and use § 13.3 synthetic holograms, P487].
Technical solution of the present utility model is as follows:
A kind of big visual field numeral holographic imaging device comprises LASER Light Source, it is characterized in that also comprising: beam expanding telescope, beam splitter, two completely reflecting mirrors, a semi-transparent semi-reflecting lens, lens, testing sample, detector, moveable platform and a computing machine.The position relation of each component is as follows: establish beam expanding telescope and beam splitter on the laser output light path of LASER Light Source, A bundle irradiation testing sample in two output beams of this beam splitter (A, B), the output terminal of testing sample is completely reflecting mirror and semi-transparent semi-reflecting lens, this outbound course is provided with convergent lens, detector and computing machine, described light beam (B) is through the reflection of another completely reflecting mirror and semi-transparent semi-reflecting lens and enter this convergent lens and detector, meet with the A light beam and produce hologram, hologram is stored in the computing machine, is reconstructed.
Said LASER Light Source is the relevant He-Ne LASER Light Source of a single transverse mode.
Said beam expanding telescope is the beam expander optical system of an energy with He-Ne laser beam enlarged-diameter.
Said beam splitter can be with He-Ne laser instrument intensity reflection and each medium lamina membranacea of 50% of transmission.
Said completely reflecting mirror is that a piece can be with the medium lamina membranacea of He-Ne laser 100% reflection.
Said semi-transparent semi-reflecting lens is that an energy is with He-Ne laser-bounce and each medium lamina membranacea of 50% of transmission.
Said testing sample is position phase or an amplitude type object to be studied.
Said detector is a kind of charge-coupled device CCD, and each pixel, size are approximately about 20 μ m.
Said moveable platform is a parallel mobile high-accuracy worktable, is used for loading charge-coupled device CCD8, available Piezoelectric Ceramic, and mobile accuracy reaches five micron dimensions.
Said computing machine be used for real-time reconstruct CCD go up record and digitizing hologram.
Technique effect of the present utility model is as follows:
As all other hologram-interferometer, the fringe spacing d on the hologram:
λ is a He-Ne optical maser wavelength in the formula, and θ is the angle between A bundle and the B bundle, if select θ=18 ° 24 ', fringe spacing d=2 μ m so, this numerical value substantially exceeds the resolution of CCD own.We also add lens in light path, its purpose is to enlarge 10 times of fringe spacings.Lens place between beam splitter and the detector, the focal length of lens is 80mm, adjust the distance between lens and the detector, with a microscopic examination interference fringe that places on the detector position, making its fringe spacing is 2 * 10=20 μ m, shooting hologram then exposes, obtain first hologram, mobile in the direction of arrows then moveable platform, every displacement is 20 μ m, is the pixel size of a CCD also, takes a hologram, so constantly repeat, till taking 10 holograms.In fact, these 10 holograms have been stored in the computing machine, press the method for integral hologram, and they are reconstructed, and its resolution and field angle are all than the big magnitude of digital hologram of routine.
Compare with technology formerly: high-resolution large-viewing-field of the present utility model angle digital hologram device, owing to adopted branch segment record synthetic hologram method and in light path, inserted lens amplification interference spacing, thereby resolution and field angle are increased a magnitude, for the widespread use of digital hologram is laid a good foundation.
Description of drawings:
Fig. 1 is the schematic diagram of the utility model high-resolution large-viewing-field angle digital hologram device.
Embodiment
The schematic diagram of the utility model high-resolution large-viewing-field angle digital hologram device as shown in Figure 1.The embodiment of the utility model high-resolution large-viewing-field angle digital hologram device is made up of following component: He-Ne laser instrument 1, beam expanding telescope 2, beam splitter 3, completely reflecting mirror 4,5, semi-transparent semi-reflecting lens 6, testing sample 7, detector 8, moveable platform 9, computing machine 10, lens 11.
Said He-Ne laser instrument 1 is single transverse mode coherent source of a 5mW.
Said beam expanding telescope 2 is energy beam expander optical systems with 50 times of He-Ne laser beam enlarged-diameter.
Said completely reflecting mirror 4,5 is energy medium lamina membranaceas with 100% reflection of He-Ne laser.
Said semi-transparent semi-reflecting lens 6 is that an energy is with He-Ne laser-bounce and each medium lamina membranacea of 50% of transmission.
Said testing sample 7 is position phase or amplitude type objects to be studied.
Said detector 8 is a kind of charge-coupled device CCD, and each pixel, size are approximately about 20 μ m.
Said moveable platform 9 is parallel mobile high-accuracy worktable, is used for loading charge-coupled device CCD8, available Piezoelectric Ceramic, and mobile accuracy reaches five micron dimensions.
Said computing machine 10 be used for real-time reconstruct CCD go up record and digitizing hologram.
Said lens 11 are to be used for amplifying the interference fringe spacing.
The principle of work and the basic process of the utility model high-resolution large-viewing-field digital holography are:
After 1 work of He-Ne laser instrument, expand Shu Yihou, be divided into A, B two-beam through beam splitter 3 through beam expanding telescope 2.A bundle is reflexed on the detector 8 by completely reflecting mirror 5 through testing sample 7, and the B bundle is by completely reflecting mirror 4 and semi-transparent semi-reflecting lens 6 reflections, and delivers on the detector 8, meets and produces hologram when A bundle and B restraint.
Adjust the distance between lens 11 and the detector 8, place detector 8 locational microscopic examination interference fringes with one, making its fringe spacing is 2 * 10=20 μ m, the shooting hologram that exposes obtains first hologram, mobile in the direction of arrows then moveable platform 9, displacement is 20 μ m, also be the pixel size of a CCD, so constantly repeat, till taking the 10th hologram.In fact, these 10 holograms have been stored in the computing machine, press the method for integral hologram, and they are reconstructed, and its resolution and field angle are all than the big magnitude of digital hologram of routine.
Claims (6)
1, a kind of big visual field numeral holographic imaging device, comprise LASER Light Source (1), it is characterized in that also comprising: beam expanding telescope (2), beam splitter (3), first completely reflecting mirror (4), second completely reflecting mirror (5), a semi-transparent semi-reflecting lens (6), lens (11), testing sample (7), detector (8), moveable platform (9) and computing machine (10), the position relation of each component is as follows: establish beam expanding telescope (2) and beam splitter (3) on the laser output light path of LASER Light Source (1), two output beam (the A of this beam splitter (3), B) A in bundle irradiation testing sample (7) and through second completely reflecting mirror (5), see through semi-transparent semi-reflecting lens (6), arrive detector (8) and computing machine (10) through convergent lens (11), described light beam (B) is through the reflection of first completely reflecting mirror (4) and semi-transparent semi-reflecting lens (6) and enter this convergent lens (11) and detector (8) and A light beam and meet and produce hologram, hologram is stored in the computing machine (10), and described detector (8) is placed on the moveable platform (9).
2, big visual field numeral holographic imaging device according to claim 1 is characterized in that described LASER Light Source (1) is the relevant He-Ne LASER Light Source of a single transverse mode.
3, big visual field numeral holographic imaging device according to claim 1 is characterized in that described beam expanding telescope (2) is the beam expander optical system of an energy with He-Ne laser beam enlarged-diameter.
4, big visual field numeral holographic imaging device according to claim 1 is characterized in that described beam splitter (3) is reflection and each medium lamina membranacea of 50% of transmission.
5, big visual field numeral holographic imaging device according to claim 1 is characterized in that described testing sample (7) is position phase or an amplitude type object to be studied.
6, big visual field numeral holographic imaging device according to claim 1 is characterized in that described detector (8) is a kind of charge-coupled device CCD, and its each pixel, size are approximately about 20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082611 CN2727813Y (en) | 2004-09-07 | 2004-09-07 | Large-view-field digital holographic imaging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200420082611 CN2727813Y (en) | 2004-09-07 | 2004-09-07 | Large-view-field digital holographic imaging device |
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| CN2727813Y true CN2727813Y (en) | 2005-09-21 |
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| CN 200420082611 Expired - Fee Related CN2727813Y (en) | 2004-09-07 | 2004-09-07 | Large-view-field digital holographic imaging device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290060A (en) * | 2011-06-24 | 2011-12-21 | 上海大学 | Axonometric single chromatography hologram recording device |
| CN103175478A (en) * | 2013-03-08 | 2013-06-26 | 华中科技大学 | Infrared-imaging-based film thickness gauge |
| CN105953651A (en) * | 2015-02-11 | 2016-09-21 | 贵州景浩科技有限公司 | Novel holographic electronic aiming device |
-
2004
- 2004-09-07 CN CN 200420082611 patent/CN2727813Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290060A (en) * | 2011-06-24 | 2011-12-21 | 上海大学 | Axonometric single chromatography hologram recording device |
| CN102290060B (en) * | 2011-06-24 | 2015-07-01 | 上海大学 | Axonometric single chromatography hologram recording device |
| CN103175478A (en) * | 2013-03-08 | 2013-06-26 | 华中科技大学 | Infrared-imaging-based film thickness gauge |
| CN103175478B (en) * | 2013-03-08 | 2016-01-20 | 华中科技大学 | A kind of THICKNESS GAUGE FOR THE MEASUREMENT OF THIN FOILS based on infrared imaging |
| CN105953651A (en) * | 2015-02-11 | 2016-09-21 | 贵州景浩科技有限公司 | Novel holographic electronic aiming device |
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| CF01 | Termination of patent right due to non-payment of annual fee |