CN204964018U - Can realize super high spectral resolution's spectrum splitting system - Google Patents
Can realize super high spectral resolution's spectrum splitting system Download PDFInfo
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- CN204964018U CN204964018U CN201520279102.1U CN201520279102U CN204964018U CN 204964018 U CN204964018 U CN 204964018U CN 201520279102 U CN201520279102 U CN 201520279102U CN 204964018 U CN204964018 U CN 204964018U
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Abstract
The utility model provides a can realize super high spectral resolution's spectrum splitting system, this system by the leading module of looking in the distance, collimation speculum M4, two -way chromatic dispersion module, assemble five parts of module and area array detector and form, the leading module of looking in the distance of target signal process, the department assembles the formation of image at the slit, light through the slit forms beam by collimation speculum M4 collimation, and beam carries out the beam split through two -way chromatic dispersion module, gathers high spectral information and exports in the area array detector through assembling the module at last.
Description
Technical field
The utility model belongs to EO-1 hyperion and super spectral instrument field, relates to a kind of spectrum system realizing ultraspectral resolution.
Background technology
Spectrometer can be divided into prism spectrum instrument, grating spectrograph and Fourier transform spectrometer etc. according to its image-forming principle, but spectrometer system has roughly the same basic composition, mainly comprise information acquisition system, dispersion system and detection receiving system, for classical dispersion system and the spectrometer based on slit, then also comprise colimated light system and focusing image-forming system, the volume and weight of spectrometer determines primarily of mechanical-optical setup.
Spectrometer can be divided into again being imaged as object and the spectral instrument for the purpose of detection of a target characteristic in purposes, often needs the spectral resolution higher than imaging spectrometer for the spectral instrument for the purpose of detection of a target characteristic.As in survey of deep space, in order to improve the recognition capability for interspace mineralogical composition, Atmospheric components, generally to the spectral range of spectrometer and spectral resolution, higher requirement can be proposed.That is need dispersion element to have higher dispersive power, the traditional dispersion method dispersive power adding prism or grating in collimated light beam is poor.
Utility model content
The technical matters that the utility model solves is: overcome the deficiencies in the prior art, propose a kind of spectrum system realizing ultraspectral resolution, solves and adopts the difficult problem that single dispersion mode dispersive power is weak, cannot realize ultraspectral resolution.
Technical solution of the present utility model is: a kind of spectrum system realizing ultraspectral resolution, comprises preposition module of looking in the distance, collimating mirror M4, two-way dispersion compensation module, assembles module and planar array detector;
Preposition module of looking in the distance is positioned at whole system foremost, for from the anti-system of axle three, comprises three catoptron mirror M 1, mirror M 2, the mirror M 3 of common optical axis; Slit S is placed on an image planes place from the anti-system of axle three, slit S is parallel with X-axis, and coordinate axis meets right hand rule, and namely X-axis is consistent with fabric width direction perpendicular to heading, and Z axis is heading; Collimating mirror M4 and confocal of preposition module of looking in the distance; Two-way dispersion compensation module comprises prism and plane reflection grating; Plane reflection grating is positioned at the emergent pupil place of the parallel beam that target beam is formed after preposition look in the distance module and collimating mirror M4;
Be incident on collimating mirror M4 through the light beam of slit S and reflect to form parallel beam; Parallel beam incident is to two-way dispersion compensation module, and after prism, form first time dispersion, dispersion is along Y direction; Prism bases is perpendicular to X-axis; Light beam after prism dispersion is incident on plane reflection grating, and the normal of plane reflection grating and XZ plane included angle are 45 °, and by completing second time dispersion after plane reflection optical grating reflection, dispersion direction is along X-direction; Spectrum after twice dispersion is incident to convergence module, eventually passes through convergence module and converges on planar array detector.
Collimating mirror M4 is off-axis parabolic mirror.
Described prism is wait girdle prism, and the angle of incidence of light entering prism is equal with the centre wavelength beam projecting angle of outgoing prism after dispersion.
Described convergence module comprises four pieces of spherical lenses: bent moon negative lens, bent moon positive lens, bent moon positive lens, bent moon negative lens.
The utility model advantage is compared with prior art:
(1) mode adopting traditional prism dispersion to combine with diffraction grating dispersion, orthogonal both direction realizes two-way dispersion, effectively improves system spectrum resolution characteristic.
(2) adopt from the anti-system of axle three as preposition telescopic system, can effectively reduce Spectral line bend, chromatic variation of distortion also can be ignored substantially.
(3) once slit S is set as place at preposition telescopic system, for suppressing veiling glare outside visual field.
Accompanying drawing explanation
Fig. 1 is the utility model system architecture schematic diagram;
Fig. 2 is the curve of spectrum schematic diagram that detector receives.
Embodiment
As shown in Figure 1, a kind of spectrum system realizing ultraspectral resolution, the spectrometer system based on the method design is made up of preposition module of looking in the distance, collimating mirror M4, two-way dispersion compensation module, convergence module 3 and planar array detector 4 five part.Echo signal, through preposition module of looking in the distance, is converged to picture at slit S place; Form parallel beam by the light of slit by collimating mirror M4 collimation, parallel beam carries out light splitting by two-way dispersion compensation module, finally by convergence module 3, hyperspectral information is gathered in planar array detector and exports.
In the utility model, spectrometer system bore is 25mm, focal length 50mm, and the slit sizes once as place is 28 × 142 μm, and spectral range 2 ~ 5 μm, realizing spectral resolution is 3nm.
Preposition module of looking in the distance comprises one from the anti-system of axle three (mirror M 1, mirror M 2, mirror M 3); Girdle prism 1 and the plane reflection gratings 2 such as two-way dispersion compensation module comprises; Assembling module is lens combination 3, and comprise four pieces of spherical lenses: bent moon negative lens, bent moon positive lens, bent moon positive lens, bent moon negative lens, optical material is colourless glasses for infrared use, and the trade mark is respectively silicon, germanium, silicon, silicon.
Preposition module of looking in the distance is positioned at whole spectrum imaging system foremost, and light beam is assembled at slit S place after preposition module of looking in the distance; Mirror M 1, M2, M3 common optical axis; Slit S is placed on an image planes place from the anti-system of axle three, slit S is parallel with X-axis, and coordinate axis meets right hand rule, and namely X-axis is consistent with fabric width direction perpendicular to heading, and Z axis is heading.Light beam through slit S is incident on collimating module and off axis paraboloid mirror collimating mirror M4, reflects to form parallel beam by collimating mirror M4.Parallel beam incident is to two-way dispersion compensation module, and after prism 1, form first time dispersion, dispersion is along X-direction; Prism 1 plane perpendicular is in X-axis.Light beam after prism 1 dispersion is incident on plane reflection grating 2, the normal of plane reflection grating 2 and 45 °, XZ plane included angle, and complete second time dispersion after being reflected by plane reflection grating 2, dispersion direction is along Y direction.Spectrum after twice dispersion is incident to assembles module 3 post-concentration on planar array detector 4.
Preposition module of looking in the distance requires different according to the focal length of spectrometer system with visual field, refraction type, reflective or catadioptric configuration can be adopted, refraction type is adopted for long-focus small field of view optical system, refraction-reflection is adopted for long-focus medium visual field optical system, adopts reflective for middle parfocal or short focus, medium visual field or large visual field optical system.In order to chromatic variation of distortion and the Spectral line bend of reduction system of trying one's best, native system adopts from the anti-system of axle three as preposition module of looking in the distance.
Prism 1 material in two-way dispersion compensation module is Mg О, waits the drift angle of girdle prism 1 to be about 60 °.Plane reflection grating 2 incisure density in two-way dispersion compensation module is 36lp/mm, blazing angle 75.6 °.Grating dispersion direction is perpendicular to the dispersion direction waiting girdle prism 1.As shown in Figure 2, realize 8 grades of dispersions by the directional light of collimating module outgoing through waiting girdle prism 1, the light beam after dispersion, again after plane reflection grating 2, realizes 125 grades of dispersions.Plane reflection grating 2 cutting direction is parallel with X-axis.
Planar array detector 4 is the HgCdTe focal plane arrays (FPA) of 240 × 640 pixels.
The content be not described in detail in the utility model instructions belongs to the known technology of those skilled in the art.
Claims (4)
1. can realize a spectrum system for ultraspectral resolution, it is characterized in that: comprise preposition module of looking in the distance, collimating mirror M4, two-way dispersion compensation module, assemble module (3) and planar array detector (4);
Preposition module of looking in the distance is positioned at whole system foremost, for from the anti-system of axle three, comprises three catoptron mirror M 1, mirror M 2, the mirror M 3 of common optical axis; Slit S is placed on an image planes place from the anti-system of axle three, slit S is parallel with X-axis, and coordinate axis meets right hand rule, and namely X-axis is consistent with fabric width direction perpendicular to heading, and Z axis is heading; Collimating mirror M4 and confocal of preposition module of looking in the distance; Two-way dispersion compensation module comprises prism (1) and plane reflection grating (2); Plane reflection grating (2) is positioned at the emergent pupil place of the parallel beam that target beam is formed after preposition look in the distance module and collimating mirror M4;
Be incident on collimating mirror M4 through the light beam of slit S and reflect to form parallel beam; Parallel beam incident is to two-way dispersion compensation module, and after prism (1), form first time dispersion, dispersion is along Y direction; Prism (1) plane perpendicular is in X-axis; Light beam after prism (1) dispersion is incident on plane reflection grating (2), the normal of plane reflection grating (2) and XZ plane included angle are 45 °, by completing second time dispersion after plane reflection grating (2) reflection, dispersion direction is along X-direction; Spectrum after twice dispersion is incident to assembles module (3), eventually passes through convergence module (3) and converges on planar array detector (4).
2. a kind of spectrum system realizing ultraspectral resolution according to claim 1, is characterized in that: collimating mirror M4 is off-axis parabolic mirror.
3. a kind of spectrum system realizing ultraspectral resolution according to claim 1, it is characterized in that: described prism (1) is wait girdle prism, and the angle of incidence of light entering prism (1) is equal with the centre wavelength beam projecting angle of outgoing prism (1) after dispersion.
4. a kind of spectrum system realizing ultraspectral resolution according to claim 1, is characterized in that: described convergence module (3) comprises four pieces of spherical lenses: bent moon negative lens, bent moon positive lens, bent moon positive lens, bent moon negative lens.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784115A (en) * | 2016-05-26 | 2016-07-20 | 上海新产业光电技术有限公司 | Spectroradiometer based on rotary filter monochromator |
| CN105865626A (en) * | 2016-05-26 | 2016-08-17 | 上海新产业光电技术有限公司 | Hyperspectral imager based on rotary filter monochromator |
| CN105890756A (en) * | 2016-05-26 | 2016-08-24 | 上海新产业光电技术有限公司 | Rotary filter-based monochromator |
| CN106352982A (en) * | 2016-08-29 | 2017-01-25 | 上海交通大学 | High-resolution miniature spectrometer |
| CN109060129A (en) * | 2018-08-20 | 2018-12-21 | 中国科学院上海技术物理研究所 | A kind of imaging spectrometer optical system based on free form surface and curved surface prism |
| CN110118602A (en) * | 2019-06-11 | 2019-08-13 | 李颖 | A kind of broadband high-resolution spectroscopy image-forming information acquisition device simultaneously |
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2015
- 2015-04-30 CN CN201520279102.1U patent/CN204964018U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784115A (en) * | 2016-05-26 | 2016-07-20 | 上海新产业光电技术有限公司 | Spectroradiometer based on rotary filter monochromator |
| CN105865626A (en) * | 2016-05-26 | 2016-08-17 | 上海新产业光电技术有限公司 | Hyperspectral imager based on rotary filter monochromator |
| CN105890756A (en) * | 2016-05-26 | 2016-08-24 | 上海新产业光电技术有限公司 | Rotary filter-based monochromator |
| CN106352982A (en) * | 2016-08-29 | 2017-01-25 | 上海交通大学 | High-resolution miniature spectrometer |
| CN106352982B (en) * | 2016-08-29 | 2018-12-18 | 上海交通大学 | Miniature high resolution spectrometer |
| CN109060129A (en) * | 2018-08-20 | 2018-12-21 | 中国科学院上海技术物理研究所 | A kind of imaging spectrometer optical system based on free form surface and curved surface prism |
| CN109060129B (en) * | 2018-08-20 | 2023-11-07 | 中国科学院上海技术物理研究所 | Imaging spectrometer optical system based on free-form surface and curved prism |
| CN110118602A (en) * | 2019-06-11 | 2019-08-13 | 李颖 | A kind of broadband high-resolution spectroscopy image-forming information acquisition device simultaneously |
| CN110118602B (en) * | 2019-06-11 | 2023-10-03 | 大连海事大学 | Device for simultaneously acquiring broadband high-resolution spectral imaging information |
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