CN2718538Y - Orthogonal raster chromatic dispersion spectrograph - Google Patents
Orthogonal raster chromatic dispersion spectrograph Download PDFInfo
- Publication number
- CN2718538Y CN2718538Y CN 200420020811 CN200420020811U CN2718538Y CN 2718538 Y CN2718538 Y CN 2718538Y CN 200420020811 CN200420020811 CN 200420020811 CN 200420020811 U CN200420020811 U CN 200420020811U CN 2718538 Y CN2718538 Y CN 2718538Y
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- grating
- chromatic dispersion
- orthogonal
- light
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Abstract
The utility model belongs to the technical field of optics, particularly an orthogonal raster chromatic dispersion spectrograph. The utility model is formed by the orderly arrangement of a light entering aperture, a collimating mirror, an orthogonal chromatic dispersion system, a focusing mirror and a detector arranged in sequence, wherein, the chromatic dispersion system can be composed of two pieces of raster of which the chromatic dispersion directions are perpendicular to each other and can be also composed of the raster and a prism of which the chromatic dispersion directions are perpendicular to each other. The utility model utilizes the method of orthogonal raster chromatic dispersion to reduce the influence of background light and high-order diffracted light on a broad band spectrograph, and the utility model has the advantages of novel conception, simple structure and low cost.
Description
Technical field
The utility model belongs to optical technical field, is specifically related to a kind of orthogonal grating dispersive spectrometer.
Background technology
For reduce bias light and since the influence of grating higher diffraction orders light in spectrometer, use with the method for optical filter and linear variable wavelength filter.But optical filter is not suitable for the broadband application field, because the broadband application field requires spectrum can contain from UV to the NIR wavelength coverage.
Summary of the invention
The purpose of this utility model is to provide a kind of orthogonal grating dispersive spectrometer.
The orthogonal grating dispersive spectrometer that the utility model proposes, be arranged in order and form by light inlet, collimating mirror, cross dispersion system, focus lamp, detector, light inlet 1 is aimed at collimating mirror 2, the light-emitting window of collimating mirror 2 is aimed at the cross dispersion system, the light-emitting window of cross dispersion system is aimed at focus lamp 5, optic probe on the detector 6 is aimed at the light-emitting window by focus lamp 5 emissions, forms light path system.
In the utility model, the cross dispersion system can be made up of plane grating 3,4, and the angle of the dispersion direction of this two grating is α, 0＜α≤90 ° be the best when dispersion direction is vertical each other, as shown in Figure 1, in this structure, double grating in succession with orthogonal direction chromatic dispersion incident light.The light of chromatic dispersion has formed the image of a two dimension on the focal plane of foveal reflex mirror.The diagonal line of the plane of delineation is exactly the main signal (such as, the first order) from double grating.Other levels all are in cornerwise both sides.
In the utility model, the cross dispersion system also can be parts of being made up of plane grating 8 and prism 7, plane grating 8 is β with the angle of the dispersion direction of prism 7,0＜β≤90 °, when dispersion direction is vertical mutually, be best, as shown in Figure 1, when using these parts in the spectrometer, the only horizontal direction that grating dispersion is come out, and the only vertical direction that prismatic colours sheds.Because the chromatic dispersion of prism, the different diffraction level of grating terminates in the differing heights of imaging plane.Because the prism diffraction is non-linear to wavelength, and optical grating diffraction is a few symbol linear dispersions to wavelength, so the image of final main is not a straight line.
The utility model has adopted the cross dispersion system, makes light produce cross dispersion, promptly makes the vertical chromatic dispersion of light open (perhaps with angular dispersion in 0 ° to the 90 ° scope) by two step chromatic dispersions.
In the utility model, be incorporated into the size in oral pore footpath in the level and the vertical both direction upper limit.Terminal or foursquare hole of similar picture treehole, one section optical fiber is just passable.
In the utility model, for structure shown in Figure 1, grating can adopt plane grating or plane holographic grating.Two gratings groove density (being grating constant) or size go up can unanimity also can difference; For structure shown in Figure 3, can make grating in the bottom surface of prism, the bottom surface that perhaps is close to prism is with another independent plane grating.The material of prism can be for quartz, fused quartz, glass and plastic polymer a kind of.
In the utility model, catoptron can be catoptron sphere or ellipsoid.
In the utility model, detector can be two-dimensional detector, as CCD, also can be one and be similar to linear CCD, photodiode array or single-point detector that there is a pin hole that moves freely its front on the focal plane of condenser.
The utility model has utilized the method for orthogonal grating chromatic dispersion to reach to reduce the influence to the broadband light spectrometer of bias light and high order diffraction light, and it is novel, and is simple in structure, with low cost.
Description of drawings
Fig. 1 is structural diagrams of the present utility model (double grating).
Fig. 2 is prism+grating cross dispersion parts diagram.
Fig. 3 is structural diagrams of the present utility model (prism+grating).
Number in the figure: 1 is light inlet, and 2 is collimating mirror, and 3 is plane grating, and 4 is plane grating, and 5 is focus lamp, and 6 are the picture plane, and 7 is prism, and 8 is plane grating.
Embodiment
Further describe the utility model below by embodiment.
Claims (5)
1, a kind of orthogonal grating dispersive spectrometer, it is characterized in that being arranged in order and forming by light inlet (1), collimating mirror (2), cross dispersion system, focus lamp (5), detector (6), light inlet (1) is aimed at collimating mirror (2), the light-emitting window of collimating mirror (2) is aimed at the cross dispersion system, the light-emitting window of dispersion system is aimed at focus lamp (5), and the optic probe on the detector (6) is aimed at the light-emitting window by focus lamp (5) emission.
2, orthogonal grating dispersive spectrometer according to claim 1 is characterized in that the cross dispersion system is made up of plane grating (3), (4), and the angle of the dispersion direction of two gratings is α, 0＜α≤90 °.
3, orthogonal grating dispersive spectrometer according to claim 1 is characterized in that the cross dispersion system consists of parts by plane grating (8) and prism (7), and the dispersion direction angle of plane grating (8) and prism (7) is β, 0＜β≤90 °.
4, orthogonal grating dispersive spectrometer according to claim 2 is characterized in that the dispersion direction of plane grating (3) and (4) is vertical mutually.
5, orthogonal grating dispersive spectrometer according to claim 3 is characterized in that the dispersion direction of plane grating (8) and (7) is vertical mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020811 CN2718538Y (en) | 2004-03-02 | 2004-03-02 | Orthogonal raster chromatic dispersion spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020811 CN2718538Y (en) | 2004-03-02 | 2004-03-02 | Orthogonal raster chromatic dispersion spectrograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2718538Y true CN2718538Y (en) | 2005-08-17 |
Family
ID=34892698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420020811 Expired - Fee Related CN2718538Y (en) | 2004-03-02 | 2004-03-02 | Orthogonal raster chromatic dispersion spectrograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2718538Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493357B (en) * | 2009-03-05 | 2010-06-09 | 谭成忠 | Boradband spectrometer |
| CN102564591A (en) * | 2011-12-29 | 2012-07-11 | 聚光科技(杭州)股份有限公司 | Spectrum analyzer and spectrum analyzing method |
| CN1837992B (en) * | 2006-02-16 | 2012-07-18 | 苏州大学 | Method for making lattice holographic rainbow optically-variable image |
| CN110132413A (en) * | 2019-05-07 | 2019-08-16 | 武汉驭光科技有限公司 | High precision wide range spectral method of detection and device |
-
2004
- 2004-03-02 CN CN 200420020811 patent/CN2718538Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837992B (en) * | 2006-02-16 | 2012-07-18 | 苏州大学 | Method for making lattice holographic rainbow optically-variable image |
| CN101493357B (en) * | 2009-03-05 | 2010-06-09 | 谭成忠 | Boradband spectrometer |
| CN102564591A (en) * | 2011-12-29 | 2012-07-11 | 聚光科技(杭州)股份有限公司 | Spectrum analyzer and spectrum analyzing method |
| CN102564591B (en) * | 2011-12-29 | 2014-04-16 | 聚光科技(杭州)股份有限公司 | Spectrum analyzer and spectrum analyzing method |
| CN110132413A (en) * | 2019-05-07 | 2019-08-16 | 武汉驭光科技有限公司 | High precision wide range spectral method of detection and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |