Atmospheric co 2 Optical system of hyperspectral imaging spectrometer

An imaging spectrometer and optical system technology, applied in the field of optical systems, can solve the problems of heavy weight and large volume, and achieve the effect of large field of view, small volume, simple and compact structure

Active Publication Date: 2017-03-29
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the greenhouse gas imaging spectrometers currently developed at home and abroad are facing problems such as large volume and heavy weight.

Method used

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  • Atmospheric co <sub>2</sub> Optical system of hyperspectral imaging spectrometer
  • Atmospheric co <sub>2</sub> Optical system of hyperspectral imaging spectrometer
  • Atmospheric co <sub>2</sub> Optical system of hyperspectral imaging spectrometer

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Embodiment 1

[0020] The technical scheme of this embodiment is suitable for atmospheric CO 2 Hyperspectral imaging spectrometer optical system, front system field of view 20°, working band 0.758μm~2.080μm, focal length 14mm, F number 4; spectroscopic system working band O 2 -A band 0.758μm~0.772μm, weak CO 2 Band 1.591μm~1.621μm and strong CO 2 The band ranges from 2.044μm to 2.080μm, and the spectral resolving power of the three bands is 21000.

[0021] See attached figure 1 , which is suitable for atmospheric CO provided by this example 2 Schematic diagram of the optical system structure of the hyperspectral imaging spectrometer; the optical system includes a front system, a spectroscopic system and three focal plane detectors 19, 20 and 21. Its volume is 227mm long x 191mm wide x 121mm high. The front system includes two reflectors 3 and 5; the beam splitting system includes an entrance slit 7, a collimation system, a step immersion diffraction grating 14, an imaging system, and tw...

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Abstract

The invention discloses an optical system for an atmosphere CO2 hyper-spectrum imaging spectrometer. The optical system is suitable for detecting the small change of atmosphere CO2 column concentration with high precision. The optical system comprises an inverse Cassegrain form front-arranged system, a Litrow-type and middle-ladder immersion diffraction grating light splitting system and a focal plane detector, and spectrum forms of an oxygen-A (O2-A) band, a weak CO2 wave band and a strong CO2 wave band are detected at the same time. Three different middle-ladder immersion diffraction grating diffraction levels are adopted in the three wave bands, and the three wavebands share one front-arranged system, an entrance slit and the light splitting system. The optical system has the advantages of being compact in structure, small in size, wide in view field, high in spectrum resolution, good in imaging quality, and suitable for the wide-coverage micro-miniature CO2 hyper-spectrum imaging spectrometer.

Description

technical field [0001] The invention relates to an optical system of a spectral imaging spectrometer, in particular to an optical system suitable for high-precision detection of atmospheric CO 2 Optical system of a hyperspectral imaging spectrometer with small changes in column concentration. Background technique [0002] CO 2 As an important greenhouse gas, the climate problem caused by its increasing emissions has become one of the environmental issues of global concern. High-precision measurement of atmospheric CO 2 concentration, to determine the atmospheric CO 2 Concentrations vary in time and space, searching for CO 2 Sources and sinks and their locations, for research on CO 2 Climate effects are important. To this end, Japan, the United States, the European Union and other countries are actively developing greenhouse gas monitoring satellites. [0003] However, the greenhouse gas imaging spectrometers currently developed at home and abroad are facing problems su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
Inventor 沈为民宋文宝靳阳明
Owner SUZHOU UNIV
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