CN2401883Y - High-flux chromatographic imaging spectrum device - Google Patents
High-flux chromatographic imaging spectrum device Download PDFInfo
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- CN2401883Y CN2401883Y CN 99256128 CN99256128U CN2401883Y CN 2401883 Y CN2401883 Y CN 2401883Y CN 99256128 CN99256128 CN 99256128 CN 99256128 U CN99256128 U CN 99256128U CN 2401883 Y CN2401883 Y CN 2401883Y
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- 238000003384 imaging method Methods 0.000 title claims abstract description 30
- 238000001228 spectrum Methods 0.000 title abstract description 10
- 230000004907 flux Effects 0.000 claims abstract description 12
- 230000003595 spectral effect Effects 0.000 claims description 11
- 238000003325 tomography Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000000701 chemical imaging Methods 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 238000004587 chromatography analysis Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Abstract
A high-flux chromatographic imaging spectrum device is composed of an objective lens, a collimating lens, a direct-view prism, an imaging lens and a CCD detector, wherein the direct-view prism is arranged in a rotating mechanism, a stepping motor is connected with a box body and is connected with a driving gear, the driving gear is meshed with a driven gear, the driven gear is connected with the direct-view prism, one end of the driven gear is provided with a bearing, the other end of the driven gear is connected with a connecting shaft, the connecting shaft is provided with a bearing, and the bearing is arranged on a support. The utility model discloses simple structure has high flux, high spectrum, multichannel, high SNR, excellent performance, job stabilization, and the reconsitution algorithm converges fast, carries out spectral imaging to static target.
Description
The utility model relates to a kind of high flux tomography spectral device, is applicable to that military target is surveyed, land resource is reconnoitred, environmental monitoring, ocean resources generaI investigation, disaster monitoring and evaluation, uranology are studied, atmospheric exploration.
Imaging spectrometer mainly contains three types, color dispersion-type, interfere type and chromatography type at present.Wherein color dispersion-type has been in the application stage, and its feature is that principle is simple, stable performance, but capacity usage ratio is low; Interfere type has been in principle development and preliminary trial period, and various forms of interfere type imaging spectrometers have appearred, as time modulation type, spatial modulation type and LARGE APERTURE STATIC IMAGING interfere type etc., wherein the ray machine LARGE APERTURE STATIC IMAGING coherence imaging spectrometer developed in Chinese Academy of Sciences Xi'an is the most outstanding representative of performance.The imaging under the mode of staring of time modulation type imaging spectrometer, it realizes spectral imaging by pushing away the method that clears off path difference; And spatial modulation type imaging spectrometer is operated in and pushes away under the mode of sweeping, and it resembles by the spectrum that the method that pushes away pan obtains two dimension target.The chromatography type is shown up prominently, and it has space and spectrum hyperchannel advantage.The chromatography type mainly contains two kinds of forms at present: grating type and direct vision prism type.Grating type chromatographic imaging spectrometer can resemble at single exposure obtains target in the time spectrum, and does not need any type of scanning, but its field angle is less, requires too high to the performance and the picture dot number of detector.The working method of direct vision prism type chromatographic imaging spectrometer is similar to index glass type coherence imaging spectrometer, the work of imaging pattern need stared, but it is without any the beam splitting device, capacity usage ratio is the same with ordinary camera, is present the highest a kind of of capacity usage ratio in all imaging spectrometers.Though a moving component is arranged in this instrument, i.e. direct vision prism, direct vision prism be (or stepping) rotation continuously under motor-driven, do not produce extra momentum momentum, it also is the more stable instrument of work, particularly compares with the index glass type, and it need not high-precision control gear.The research based on the chromatographic imaging spectral technique of direct vision prism has been carried out in the Rome laboratory, Hanscom air base of Massachusetts, and as the chromatic dispersion device, direct vision prism is driven by the continuous motor rotating of a low speed, rotates continuously around optical axis with direct vision prism for it.In the time that rotates a circle around optical axis, they obtain the multiframe projected image, utilize the multiframe projected image reconstruct spectrum that obtains to resemble (data cube just) then, complicated (the SPIE Vol of image reconstruction procedure, 3118 (1997) pp170～178), the signal to noise ratio (S/N ratio) of restructing algorithm is relatively poor.The signal to noise ratio (S/N ratio) of restructing algorithm is poor.
The purpose of this utility model has provided a kind of high flux tomography spectral device, and direct vision prism is housed in rotating mechanism, and simple in structure, working stability, restructing algorithm converge picture fast.
In order to achieve the above object, the utility model adopts following technical measures: high flux tomography spectral device is obtained with disposal system 7 by object lens, field stop, collimating mirror, rotating mechanism, direct vision prism, imaging mirror and ccd detector and signal to be formed.Object lens, field stop and collimating mirror are formed preposition optical system, and it transfers target emanation to certain visual angle directional light, simultaneously also can preventing stray light.Direct vision prism is in the parallel light path between collimating mirror and the imaging mirror, and a branch of secondary color directional light is the directional light of different wave length by chromatic dispersion behind direct vision prism, is received because of the fuzzy picture of chromatic dispersion on the back focal plane of imaging mirror by ccd detector at last.Rotating mechanism is made of stepper motor and pair of engaged gears, and step motor control is convenient, has automatic locking to move function, and this makes it be easy to control rotation angle.By step motor drive, meshing gear transmission, drive direct vision prism and rotate around optical axis, stepper motor whenever makes a move, and 0.9 ° of its driven gear rotation also drives 0.9 ° of direct vision prism rotation by gears.The imaging mirror is collected in projection image on the ccd detector.Direct vision prism makes parallel beam that deviation not take place when centre wavelength, at other wavelength direction of both ends deviation up and down, this make when direct vision prism when optical axis rotates, the invariant position of picture centre on ccd detector.If the picked-up piece image just information is obtained the projection image that can utilize these different rotary angles with disposal system so, is used novel chromatography algorithm after direct vision prism whenever rotates a certain angle, reconstruct hyper-spectral and resemble, be i.e. data cube.
The utility model is introduced imaging spectrum to chromatographic theory, and it obtains chromatic dispersion in the different anglecs of rotation and resemble by the rotation direct vision prism, and these chromatic dispersions resemble just data cube in the projection image of different angles.The theory of chromatography shows, if can access the projection image of the different projection angles of three-dimensional body, so, might carry out contrary projective transformation to these projection images, thereby obtain the three-dimensional body of the reconstruct of wanting.The reconstruct that needs infinite a plurality of or continuous data for projection just can improve theoretically.The data of limited projected angle of general using can obtain satisfied reconstruction.This restructing algorithm can obtain 50 chromatic dispersion projection images with upper angle of target, just obtains satisfied spectrographic images (80 more than the wave band).
Direct vision prism is formed by two glass gummeds, and one is the K9 glass of low-refraction, high abbe number, and another piece is the ZF6 glass of high index of refraction, low abbe number, and each face of two blocks of glass has the pitch angle.K9 and ZF6 are two kinds of relatively more conventional glass, and their physical characteristics is also relatively good, and the two-chip type direct vision prism also is easy to processing.When adopting the imaging spectrometer of this direct vision prism to guarantee the direct vision prism rotation, the center of projected image is motionless on the face of resembling.
The utility model compared with prior art, have the following advantages and effect: simple in structure, high flux, high spectrum, hyperchannel, high s/n ratio, function admirable, working stability, restructing algorithm is restrained fast, static target is carried out high speed imaging (is like this at geostationary orbit), obtain the projection image of the data cube of target, the just data cube of restructural target is merged in these projection images at different projection angles.
Fig. 1 is the structural representation of high flux tomography spectral device.
Fig. 2 is the vertical view of high flux tomography spectral device.
Fig. 3 is the synoptic diagram of direct vision prism.
Below in conjunction with accompanying drawing the utility model is described in further detail:
According to Fig. 1, Fig. 2 as can be known, high flux tomography spectral device is made of object lens 1, collimating mirror 3, direct vision prism 4, imaging mirror 5, ccd detector 6.Object lens 1 with the target imaging on field stop 2, that is to say that once resembling of target is positioned on the field stop 2, field stop 2 is positioned on the front focal plane of collimating mirror 3, once resemble light beam that a bit (being corresponding point on the target) on the face send behind collimating mirror 3, become a branch of directional light.This bundle directional light is opened by chromatic dispersion behind direct vision prism 4, and the projection image that imaging mirror 5 is opened chromatic dispersion collects resembling on the face of ccd detector 6.Direct vision prism 4 is housed in the rotating mechanism 7, and rotating mechanism 7 drives direct vision prism 4 and rotate around optical axis, and a width of cloth projection image is absorbed in the back that rotates to an angle, each anglec of rotation correspondence projection angle from the data cube to the projection image.Rotating mechanism 7 is made up of stepper motor 9, driving gear 10 and follower gear 11, stepper motor 9 links to each other with casing 8, stepper motor 9 is connected with driving gear 10, stepper motor 9 drives driving gear 10 rotations, driving gear 10 is meshed with follower gear 11, driving gear 10 drives follower gear 11 and rotates together, and ratio of gear is 1: 1.Follower gear 11 links to each other with direct vision prism 4, just direct vision prism 4 is fixed on follower gear 11 the insides, and follower gear 11 1 ends are equipped with bearing 12, and the other end is connected with connecting shaft 13, and bearing 14 is housed on the connecting shaft 13, and bearing 12 and bearing 14 are fixed on the support 15.Follower gear 11 drives direct vision prism 4 rotations.Signal obtains with disposal system to be made up of the software of image pick-up card, computing machine, chromatographic imaging spectrometer.The projection image of the multiframe different angles that it detects ccd detector is after the A/D conversion, be stored in the computing machine, the multiframe projected image of these storages of software transfer of chromatographic imaging spectrometer, and through reconstruction processing, the spectrum that obtains target resembles (data cube just).
Press Fig. 3 as can be known, it is made up of a K9 glass prism and a ZF6 glass prism, and K9 glass is placed on the ZF6 front.The cross section of K9 glass is isosceles right triangle, and beam incident surface is at the right angle face, and cemented surface is on the inclined-plane, and the cross section of ZF6 glass is triangle in obtuse angle, and cemented surface is on the longest edge of obtuse triangle, and the angle of light beam exit facet and cemented surface is 28.1188 °.This direct vision prism is a deviation not to the incident ray of 580nm wavelength, and as sheet glass, but the incident ray of other wavelength is towards the two ends deviation.Like this, when the rotation direct vision prism, the center of projected image is constant.
Claims (3)
1. high flux tomography spectral device, it is made of object lens (1), collimating mirror (2), imaging mirror (5), it is characterized in that being equipped with in the rotating mechanism (7) direct vision prism (4), stepper motor (9) is connected with driving gear (10), and follower gear (11) is connected with direct vision prism (4).
2. a kind of high flux tomography spectral device according to claim 1 is characterized in that driving gear (10) is meshed with follower gear (11).
3. a kind of high flux tomography spectral device according to claim 1, it is characterized in that follower gear (11) one ends are equipped with bearing (12), the other end is connected with connecting shaft (13), and bearing (14) is housed on the connecting shaft (13), and bearing (12) is fixed on the support (15) with bearing (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256128 CN2401883Y (en) | 1999-12-28 | 1999-12-28 | High-flux chromatographic imaging spectrum device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256128 CN2401883Y (en) | 1999-12-28 | 1999-12-28 | High-flux chromatographic imaging spectrum device |
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| Publication Number | Publication Date |
|---|---|
| CN2401883Y true CN2401883Y (en) | 2000-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99256128 Expired - Fee Related CN2401883Y (en) | 1999-12-28 | 1999-12-28 | High-flux chromatographic imaging spectrum device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464692C (en) * | 2006-11-09 | 2009-03-04 | 上海理工大学 | Method and apparatus for obtaining tissue micro tomography image and spectrum |
-
1999
- 1999-12-28 CN CN 99256128 patent/CN2401883Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464692C (en) * | 2006-11-09 | 2009-03-04 | 上海理工大学 | Method and apparatus for obtaining tissue micro tomography image and spectrum |
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| Date | Code | Title | Description |
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| 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 |