CN102865924A - Slit assembly for adjusting and testing hyperspectral imaging spectrometer - Google Patents
Slit assembly for adjusting and testing hyperspectral imaging spectrometer Download PDFInfo
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- CN102865924A CN102865924A CN201210299291XA CN201210299291A CN102865924A CN 102865924 A CN102865924 A CN 102865924A CN 201210299291X A CN201210299291X A CN 201210299291XA CN 201210299291 A CN201210299291 A CN 201210299291A CN 102865924 A CN102865924 A CN 102865924A
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Abstract
The invention discloses a slit assembly for adjusting and testing a hyperspectral imaging spectrometer. Light emitted from a testing light source enters via an optical fiber end surface, is conducted via an optical fiber bundle, is emitted out via an output end of the optical fiber bundle, illuminates circular small holes, and enters the imaging spectrometer via the circular small holes, and the testing light source is a suitable light source for adjusting and testing the spectrometer. Consistency and uniformity of intensity of the light emitted in the circular small holes are guaranteed under the condition that the conventional light source is used for illumination, the problem that light sources are insufficient in adjusting and testing processes of the hyperspectral imaging spectrometer is solved, and suitable incidence light sources are provided for the imaging spectrometer by combining different light sources.
Description
Technical field
The present invention relates to a kind of Hyper spectral Imaging spectrometer debugs, tests and use the slit assembly.
Background technology
General object imaging comprises two-dimensional space information, and Hyper spectral Imaging has recorded the radiation intensity information that pixel changes with wavelength variations simultaneously comprising on the basis of spatial information, pixel has three-dimensional information, it is the space dimension, x, y and spectrum dimension λ, imaging spectrometer has been widely used in the fields such as satellite remote sensing, geology detecting, precision agriculture, the manufacturing and military surveillance.
General its spectral resolution of Hyper spectral Imaging spectrometer is that Subnano-class is other, and spatial resolution is the pixel level, and this precision has proposed very high requirement to debugging.Require on the one hand the inner grating of spectrum, eyeglass to need high-precision debugging device, detector face to need high-precision debuging, also require simultaneously the light source that provides suitable for debuging, the present invention designs and has researched and developed special-purpose imaging spectrometer and debug, test and use the slit assembly, and this assembly can provide suitable incident light source for imaging spectrometer in conjunction with different light sources.
Summary of the invention
The object of the invention is exactly in order to remedy the defective of prior art, to provide a kind of imaging spectrometer of special use to debug, test and use the slit assembly, having solved the problem that the Hyper spectral Imaging spectrometer is debug, test process lacks suitable sources.
The present invention is achieved by the following technical solutions:
A kind of Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit, have the circular aperture of a series of different spacing at described entrance slit, can test the situation of whole image planes, be imaged on the image planes because slit is 1:1, open the aperture of different spacing on the slit, import incident light, namely can be imaged on the whole image planes, observe the situation of whole image planes; The diameter of described circular aperture equals the width of described entrance slit, the spacing of described circular aperture has three kinds: equal the theoretical spatial resolution of Hyper spectral Imaging spectrometer, greater than the theoretical spatial resolution of Hyper spectral Imaging spectrometer with less than the theoretical spatial resolution of Hyper spectral Imaging spectrometer, can clearly find out like this spatial resolution of spectrometer.
A kind of Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit, also include optical fiber incident end face, fibre bundle and fibre bundle output terminal, the light that testing light source sends enters in the fibre bundle from described optical fiber incident end face, and from described fibre bundle output terminal output; Have the circular aperture of a series of different spacing at described entrance slit, the diameter of described circular aperture equals the width of described entrance slit, and the spacing of described circular aperture has three kinds: equal the theoretical spatial resolution of Hyper spectral Imaging spectrometer, greater than the theoretical spatial resolution of Hyper spectral Imaging spectrometer with less than the theoretical spatial resolution of Hyper spectral Imaging spectrometer; Remove to illuminate different circular apertures with the light from described fibre bundle output terminal output, the luminous energy of from then on optic fibre hole output of the size requirements of the fiber optic aperture on the described fibre bundle output terminal illuminates two adjacent circular apertures.
Imaging spectrometer is debug the debugging that comprises spectral resolution and two indexs of imaging resolution, be embodied in X, the Y-direction of spectrometer imaging surface, and two kinds of mutually restrictions, therefore in debuging process, preferably can see simultaneously the situation of Resolutions in the whole image planes, in order to reach good balance, satisfy two kinds demand.
The general element lamp (low pressure mercury lamp etc.) that adopts if use traditional wire slit, only can embody the spectral resolution of certain row as testing light source, can't embody spectrum, the spatial resolution situation of whole image planes.
Principle of work of the present invention is: the light that testing light source sends is entered by fiber end face, penetrate through the fibre bundle conduction and by the fibre bundle output terminal, illuminate circular aperture, and entered in the imaging spectrometer by circular aperture, for the light source that provides suitable is debug, tested to spectrometer.
Advantage of the present invention is: the present invention is in the situation of using conventional light illumination, guaranteed to enter to inject the consistent homogeneity of the light intensity of circular aperture, having solved the situation that the Hyper spectral Imaging spectrometer is debug, test process lacks suitable sources, is that imaging spectrometer improves suitable incident light source in conjunction with different light sources.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit 4, have the circular aperture 7 of a series of different spacing at described entrance slit 4, can test the situation of whole image planes, be imaged on the image planes because entrance slit 4 is 1:1, open the circular aperture 7 of different spacing on the entrance slit 4, import incident light, namely can be imaged on the whole image planes, observe the situation of whole image planes; The diameter of described circular aperture 7 equals the width of described entrance slit 4, the spacing of described circular aperture 7 has three kinds: equal Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions, greater than Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions with less than Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions, can clearly find out like this spatial resolution of spectrometer.
If only use the entrance slit 4 of opening a series of circular apertures 7, in the situation of using conventional light illumination, be difficult to guarantee that the light intensity of incident circular aperture 7 is consistent, because slit 4 has certain-length, such as 10mm, and general pointolite can't guarantee in this length light intensity evenly, so just brought difficulty to debugging, also can't assess simultaneously the response difference between different pixels, therefore, do further improvement.A kind of Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit 4, also include optical fiber incident end face 1, fibre bundle 2 and fibre bundle output terminal 3, the light that testing light source sends enters in the fibre bundle 2 from described optical fiber incident end face 1, and from described fibre bundle output terminal 3 outputs; Have the circular aperture 7 of a series of different spacing at described entrance slit 4, the diameter of described circular aperture 7 equals the width of described entrance slit 4, and the spacing of described circular aperture 7 has three kinds: equal Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions, greater than Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions with less than Hyper spectral Imaging spectrometer 5 theoretical spatial resolutions; Remove to illuminate different circular aperture 7 with the light from described fibre bundle output terminal 3 outputs, can guarantee the incident uniformity of light like this, the luminous energy of from then on optic fibre hole 6 outputs of convenient debugging, the size requirements of the fiber optic aperture on the described fibre bundle output terminal 3 illuminates two adjacent circular apertures 7.
Size, the spacing of aperture are exemplified below: the diameter of circular aperture 7 is the same with actual design entrance slit 4 width, is 60 microns such as design entrance slit 4 width, and then circular aperture 7 diameters need to be 60 microns; Circular aperture 7 spacings are relevant with imaging spectrometer 5 spatial resolutions, it is 78 microns such as its Theoretical Design spatial resolution, then aperture pitch design can be designed to 78 microns, greater than 78 microns (100 microns) with less than 78 microns (60 microns) etc. three kinds, can clearly find out like this spatial resolution of spectrometer.
The selection of fiber optic aperture need to be take the size of entrance slit 4 circular apertures 7 and spacing and Machinability Evaluation as foundation, requirement can be illuminated two adjacent circular apertures 7, it is 60 microns such as circular aperture, spacing is 100 microns, then the fiber optic aperture requirement is 400 microns, and doing like this is the convenience that guarantees processing, because, it is very difficult to process the very close fibre bundle 2 of spacing, and cost is very high.
Claims (2)
1. a Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit, it is characterized in that: the circular aperture that has a series of different spacing at described entrance slit, the diameter of described circular aperture equals the width of described entrance slit, and the spacing of described circular aperture has three kinds: equal the theoretical spatial resolution of Hyper spectral Imaging spectrometer, greater than the theoretical spatial resolution of Hyper spectral Imaging spectrometer with less than the theoretical spatial resolution of Hyper spectral Imaging spectrometer.
2. a Hyper spectral Imaging spectrometer is debug, is tested and use the slit assembly, include entrance slit, it is characterized in that: also include optical fiber incident end face, fibre bundle and fibre bundle output terminal, the light that testing light source sends enters in the fibre bundle from described optical fiber incident end face, and from described fibre bundle output terminal output; Have the circular aperture of a series of different spacing at described entrance slit, the diameter of described circular aperture equals the width of described entrance slit, and the spacing of described circular aperture has three kinds: equal the theoretical spatial resolution of Hyper spectral Imaging spectrometer, greater than the theoretical spatial resolution of Hyper spectral Imaging spectrometer with less than the theoretical spatial resolution of Hyper spectral Imaging spectrometer; Remove to illuminate different circular apertures with the light from described fibre bundle output terminal output, the luminous energy of from then on optic fibre hole output of the size requirements of the fiber optic aperture on the described fibre bundle output terminal illuminates two adjacent circular apertures.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017679A (en) * | 2016-06-20 | 2016-10-12 | 中国科学院遥感与数字地球研究所 | Optical fiber bundle-based multichannel spectrograph system |
| CN106525237A (en) * | 2016-10-24 | 2017-03-22 | 中国科学院国家空间科学中心 | Multi-slit multispectral system of crossed Czerny-Turner structure |
| CN111258010A (en) * | 2020-02-21 | 2020-06-09 | 中国科学院合肥物质科学研究院 | Method and device for accurately realizing laser Thomson scattering signal collection |
| CN112304871A (en) * | 2020-10-15 | 2021-02-02 | 中国科学院合肥物质科学研究院 | Ship smoke plume emission rapid remote measurement system based on imaging spectrometer |
Citations (5)
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| US4375919A (en) * | 1979-04-25 | 1983-03-08 | Baylor University | Multiple entrance aperture dispersive optical spectrometer |
| US20070201022A1 (en) * | 2006-02-27 | 2007-08-30 | Chemimage Corporation | System and method for spectral unmixing in a fiber array spectral translator based polymorph screening system |
| CN101365935A (en) * | 2005-08-18 | 2009-02-11 | 格路寇斯特斯国际私人有限公司 | An arrangement for a selection of a wavelength |
| US7636158B1 (en) * | 2004-09-24 | 2009-12-22 | Romuald Pawluczyk | Optimal coupling of high performance line imaging spectrometer to imaging system |
| US20100328659A1 (en) * | 2001-12-21 | 2010-12-30 | Andrew Bodkin | Hyperspectral Imaging Systems |
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2012
- 2012-08-21 CN CN201210299291.XA patent/CN102865924B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4375919A (en) * | 1979-04-25 | 1983-03-08 | Baylor University | Multiple entrance aperture dispersive optical spectrometer |
| US20100328659A1 (en) * | 2001-12-21 | 2010-12-30 | Andrew Bodkin | Hyperspectral Imaging Systems |
| US7636158B1 (en) * | 2004-09-24 | 2009-12-22 | Romuald Pawluczyk | Optimal coupling of high performance line imaging spectrometer to imaging system |
| CN101365935A (en) * | 2005-08-18 | 2009-02-11 | 格路寇斯特斯国际私人有限公司 | An arrangement for a selection of a wavelength |
| US20070201022A1 (en) * | 2006-02-27 | 2007-08-30 | Chemimage Corporation | System and method for spectral unmixing in a fiber array spectral translator based polymorph screening system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017679A (en) * | 2016-06-20 | 2016-10-12 | 中国科学院遥感与数字地球研究所 | Optical fiber bundle-based multichannel spectrograph system |
| CN106525237A (en) * | 2016-10-24 | 2017-03-22 | 中国科学院国家空间科学中心 | Multi-slit multispectral system of crossed Czerny-Turner structure |
| CN111258010A (en) * | 2020-02-21 | 2020-06-09 | 中国科学院合肥物质科学研究院 | Method and device for accurately realizing laser Thomson scattering signal collection |
| CN111258010B (en) * | 2020-02-21 | 2021-09-14 | 中国科学院合肥物质科学研究院 | Method and device for accurately realizing laser Thomson scattering signal collection |
| CN112304871A (en) * | 2020-10-15 | 2021-02-02 | 中国科学院合肥物质科学研究院 | Ship smoke plume emission rapid remote measurement system based on imaging spectrometer |
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| CN102865924B (en) | 2014-11-12 |
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