Polarization precision scaling system for polarization optical spectrometer

A spectrometer and polarization technology, which is applied in the field of polarization precision calibration system, can solve the problems that the polarization calibration of the polarization spectrometer with a large aperture and the polarization calibration of the full field of view of the polarization spectrometer cannot be solved, and achieve the effect of improving the accuracy
CN101464256AInactive Publication Date: 2009-06-24BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2009-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

A polarization precision calibrating system of a polarity spectrometer comprises an integrating sphere, a collimator tube, a diaphragm, an interference absorber, a polarization state generator (PSG), a polarization-preserving diffuser, a collimating lens, a polarization state detector, a reference light intensity probe and a computer. The calibrating system adopts the integrating sphere, the collimator tube, the diaphragm, the interference absorber and the polarization state generator (PSG) to generate standard polarization calibration sources; and a zero vision field and a small-caliber parallel light beam generated by the calibration sources are expanded into a full vision field and a large-caliber parallel light beam with the same polarization state, so as to carry out full vision calibration to the large-caliber polarity spectrometer. The invention has a capacity of carrying out the full vision polarization calibration to the large-caliber polarity spectrometer, adopts a unequally accurate least square principle to process data during the calibration process, and greatly improves the polarization calibration accuracy of an imaging polarity spectrometer.
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Description

technical field

[0001] The invention relates to a polarization precision calibration system for an imaging polarization spectrometer used for space-borne, airborne and ground-to-ground remote sensing and deep space exploration. Background technique

[0002] Imaging spectral polarization detection technology is of great value in the detection of clouds and atmospheric aerosols, geological exploration, soil analysis, environmental monitoring, resource investigation, crop yield estimation, disaster estimation, agricultural and animal husbandry development, marine development and utilization, and military fields. In order to better apply the imaging spectral polarization detection system and obtain accurate spectral polarization information of the target, it is necessary to carry out polarization calibration, and establish the relationship between the output signal of each detection unit of the imaging spectral polarization detection system and the actual ground object polarizati...

Claims

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