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

Inactive Publication Date: 2009-06-24
BEIHANG UNIV
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Problems solved by technology

When the traditional polarization calibration system calibrates the polarization spectrometer, it rotates the polarization spectrometer step by step so that parallel light is incident on the calibrated system at various viewing angles, so as to realize polarization calibration at each viewing angle. This kind of calibration method cannot carr

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  • Polarization precision scaling system for polarization optical spectrometer
  • Polarization precision scaling system for polarization optical spectrometer
  • Polarization precision scaling system for polarization optical spectrometer

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[0035] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] like figure 1 As shown, the present invention includes: integrating sphere 1, collimator 2, diaphragm 3, interference filter 4, polarization state generator (PSG) 5, polarization maintaining diffuser 6, collimating lens 7, reference light intensity detection device 8 and polarization state detector 9. The integrating sphere produces uniform incident light, which is collimated by the collimator, passes through the diaphragm, filter, and PSG, and is converted into parallel polarized light in the corresponding spectral range with zero field of view and small aperture, and diverges at a certain angle through the diffuser After going out, it is collimated by the collimating lens and expanded into a full-field, large-aperture parallel beam of the same polarization state, so that the full-field calibration of the large-apertu...

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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.

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...

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Application Information

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IPC IPC(8): G01N21/21G01N15/00
Inventor 赵慧洁张颖赵海博周鹏威
Owner BEIHANG UNIV
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