CN206192506U - Utilize spectral imaging device of many slits realization - Google Patents
Utilize spectral imaging device of many slits realization Download PDFInfo
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- CN206192506U CN206192506U CN201621190539.9U CN201621190539U CN206192506U CN 206192506 U CN206192506 U CN 206192506U CN 201621190539 U CN201621190539 U CN 201621190539U CN 206192506 U CN206192506 U CN 206192506U
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Abstract
The utility model belongs to the optics field especially relates to an utilize spectral imaging device of many slits realization. The utility model discloses the utilization obtains multiple targets's spectral image through setting up many slits subassembly in leading image planes department in the formation of image mirror simultaneously. The utilization pushes away sweeps, forms images to same target many times, can improve the target available energy at double, and then improve the image SNR superposeing to the spectral information of same target in the multiframe data. The effectual shortcoming of having solved high resolution image spectrometer energy shortage, low signal -to -noise ratio.
Description
Technical field
The utility model belongs to optical field, more particularly to a kind of optical spectrum imaging device realized using many slits.
Background technology
Spectral imaging technology has merged spectral technique and imaging technique, while the geometrical property for obtaining target is special with radiation
Property, realize comprehensive survey and the identification of target property.Fine identification with space remote sensing application to target property is required not
Disconnected to improve, the spectral resolution of spectral imaging apparatus, spatial resolution index are constantly lifted.
Being applied to the spectral imaging technology of space remote sensing mainly has two kinds of know-whies of color dispersion-type and interference-type.Wherein interfere
Type is divided into time-modulation interference spectrum imaging technique, space modulation interfered spectrum imager technology and space-time combined modulation interference light again
Spectral technology.
Color dispersion-type and spatial modulation static interference spectral imaging technology can be same to same target on continuous spectral coverage
When be imaged, movement-less part, one-dimensional atural object target image and spectral information in Polaroid acquisition visual field；Pass through aircraft simultaneously
Platform flight is pushed away sweeps another dimension ground object target profile information of acquisition.
According to spectral imaging technology principle, spectral imaging technology uses large area array photodetector, single exposure to obtain one
The spectral information of linear ground object is tieed up, so the emittance information of ground object target needs to launch in spectrum direction, each detector
Pixel obtains the emittance of certain spectral coverage of certain atural object.With the raising of application demand first resolution ratio, spectral resolution over the ground,
The energy information that each detector pixel is obtained will be reduced accordingly, picture quality and signal to noise ratio be influenceed, so as to limit high score
The application of resolution optical spectrum imagers.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of optical spectrum imaging device realized using many slits, uses
To solve the low defect of poor image quality, signal to noise ratio in the prior art.
In order to solve the above technical problems, the technical scheme that the utility model is used is：There is provided a kind of using many slit realities
Existing spectrum imaging method, it is characterized in that：Comprise the following steps：
1) by the k first target reflecting light in ground, a gated imaging is carried out at k equally distributed parallel slits, forms k
Individual target picture；Each slit correspondence a line pixel, width and the subsequent optical path parameter of slit meet light spectrum image-forming principle, while adopting
Collect the spectral information of multirow ground object target；K target picture is spaced M row pixels, and M is obtained not less than instrument needs the minimum of spectral coverage number
Sampling number N；
2) k target picture is distinguished into light splitting and forms k groups coherent light (or dispersed light)；
3) k groups coherent light (or dispersed light) imaging forms k width interference (or dispersion) image；
4) push away and sweep to form i frames, j row images；
5) I (i=k, j=1~M), I (i=M+k, j=M+1~M) are selected from all images by that analogy, I (i=
(k-1) * M+k, j=(k-1) * M+1~M), k-th k record of target is formed, every time record M row spectroscopic datas；
6) calculate I (1)=I (k, 1)+I (M+k, M+1)+...+I ((k-1) * M+k, (k-1) * M+1)；
I (2)=I (k, 2)+I (M+k, M+2)+...+I ((k-1) * M+k, (k-1) * M+2)；By that analogy
I (M)=I (k, M)+I (M+k, 2M)+...+I ((k-1) * M+k, k*M) obtains k-th k M of integration of target
Row spectroscopic data；
7) data inversion is carried out to the spectroscopic data after integration and obtains k-th spectrogram of target；
8) k=1 is taken, repeat the above steps 4)~step 7), you can obtain the 1st spectrogram of target；K=2 is taken, is repeated
Above-mentioned steps 4)~step 7), you can the 2nd spectrogram of target is obtained, by that analogy, you can obtain the k light of the first target in ground
Spectrogram.
The utility model also provides a kind of optical spectrum imaging device realized using many slits, including preposition imaging lens, light splitting
Component, rear group image-forming assembly and detector, it is characterized in that：Also include being arranged between preposition imaging lens and spectrum groupware
Many slit components.
2-10 bar lateral slits are set on above-mentioned many slit components.
The beneficial effects of the utility model are：The utility model is utilized and sets many by image planes of preposition imaging lens
Slit component, while obtaining the spectrum picture of multiple targets.Swept using pushing away, same target is repeatedly imaged, can be by many frame numbers
Spectral information to same target in is overlapped, and significantly improves raising target effective energy, and then improve signal noise ratio (snr) of image.
It is effective to solve the shortcoming that high-resolution image spectrometer energy is not enough, signal to noise ratio is low.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is many slit component structural representations of the utility model embodiment；
In figure, the preposition imaging lens of 1- spectrometers, many slit components of 2-, 3- spectrometer spectrum groupwares organize image-forming assembly after 4-,
5- spectrometer detectors.
Specific embodiment
The utility model is described in detail with reference to specific embodiments and the drawings explanation.
As shown in Figure 1, 2, embodiment provides a kind of spectrum imaging method realized using many slits, comprises the following steps：
1) by the k first target reflecting light in ground, a gated imaging is carried out at k equally distributed parallel slits, forms k
Individual target picture；Each slit correspondence a line pixel, width and the subsequent optical path parameter of slit meet light spectrum image-forming principle, while adopting
Collect the spectral information of multirow ground object target；K target picture is spaced M row pixels, and M is obtained not less than instrument needs the minimum of spectral coverage number
Sampling number N；
2) k target picture is distinguished into light splitting and forms k groups coherent light (or dispersed light)；
3) k groups coherent light (or dispersed light) imaging forms k width interference (or dispersion) image；
4) push away and sweep to form i frames, j row images；
5) I (i=k, j=1~M), I (i=M+k, j=M+1~M) are selected from all images by that analogy, I (i=
(k-1) * M+k, j=(k-1) * M+1~M), k-th k record of target is formed, every time record M row spectroscopic datas；
6) calculate I (1)=I (k, 1)+I (M+k, M+1)+...+I ((k-1) * M+k, (k-1) * M+1)；
I (2)=I (k, 2)+I (M+k, M+2)+...+I ((k-1) * M+k, (k-1) * M+2)；
By that analogy
I (M)=I (k, M)+I (M+k, 2M)+...+I ((k-1) * M+k, k*M) obtains k-th k M of integration of target
Row spectroscopic data；
7) data inversion is carried out to the spectroscopic data after integration and obtains k-th spectrogram of target；
8) k=1 is taken, repeat the above steps 4)~step 7), you can obtain the 1st spectrogram of target；K=2 is taken, is repeated
Above-mentioned steps 4)~step 7), you can the 2nd spectrogram of target is obtained, by that analogy, you can obtain the k light of the first target in ground
Spectrogram.
Embodiment also provide it is a kind of using many slits realize optical spectrum imaging device, including preposition imaging lens, spectrum groupware,
Image-forming assembly and detector, the also many slit components including being arranged between preposition imaging lens and spectrum groupware are organized afterwards.
2-10 bar lateral slits are set on above-mentioned many slit components.
Such as slit number k=3, each slit imaging interval M=4, detector array line number j=12, light on the detector
Spectrum information is as shown in the table：
I in table (1,1~4), I (5,5~8), I (9,9~12) be that (the 1st slit of frame the 1st is accordingly first with unit by line
Target) corresponding spectrogram.
Calculate I1=I (1,1)+I (5,5)+I (9,9)；
I2=I (1,2)+I (5,6)+I (9,10)；
I3=I (1,3)+I (5,7)+I (9,11)；
I4=I (Isosorbide-5-Nitrae)+I (5,8)+I (9,12)；
Reset the spectrogram that (I1, I2, I3, I4) is the 1st slit of the 1st frame accordingly first target；Swept by pushing away
Obtain the spectrogram of all ground targets.
Claims (2)
1. a kind of optical spectrum imaging device realized using many slits, including preposition imaging lens, spectrum groupware, rear group image-forming assembly and
Detector, it is characterised in that：Also include many slit components being arranged between preposition imaging lens and spectrum groupware.
2. the optical spectrum imaging device that many slits of utilization according to claim 1 are realized, it is characterised in that：Many slot sets
2-10 bar lateral slits are set on part.
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| CN201621190539.9U CN206192506U (en) | 2016-10-28 | 2016-10-28 | Utilize spectral imaging device of many slits realization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382985A (en) * | 2016-10-28 | 2017-02-08 | 中国科学院西安光学精密机械研究所 | Spectral imaging method and spectral imaging device realized by means of multiple slits |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382985A (en) * | 2016-10-28 | 2017-02-08 | 中国科学院西安光学精密机械研究所 | Spectral imaging method and spectral imaging device realized by means of multiple slits |
| CN106382985B (en) * | 2016-10-28 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | A kind of spectrum imaging method and its use device using the realization of more slits |
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