Imaging spectrometer calibration device

Abstract

The invention discloses an imaging spectrometer calibration device, which comprises a calibration device supporting seat, a diffuse reflection calibration plate, a diffuse reflection calibration plate driving mechanism, a reflector and a reflector driving mechanism. The diffuse reflection calibration plate driving mechanism drives the diffuse reflection calibration plate to rotate; when the diffuse reflection calibration plate rotates to the horizontal direction, sunlight is transmitted onto the diffuse reflection calibration plate and is reflected to enter an imaging spectrometer main optical system through the reflector so as to realize the light spectrum and radiation calibration function; and when the diffuse reflection calibration plate rotates to the downwards vertical direction, a ground object enters an imaging spectrometer through the reflector so as to enter an imaging state, and the reflector driving mechanism can drive the reflector to rotate so as to realize different imaging viewing angles. When the diffuse reflection calibration plate, the reflector and the calibration device supporting seat are closed, the imaging spectrometer is positioned in a dustproof and heat-insulating state. The invention has the characteristics that: the calibration device is compact in structure and has calibrating, imaging, dustproof and heat-insulating functions.

Description

Technical field: [0001] The invention relates to an imaging spectrometer, in particular to a calibration device on the imaging spectrometer, which is used for spectrum and radiation calibration of the imaging spectrometer. Background technique: [0002] The imaging spectrometer can acquire a large number of narrow-band continuous spectral images of the target. In order to make the obtained information true and reliable, it needs to be calibrated. However, although the imaging spectrometer has been calibrated and calibrated in the laboratory, once it enters the working environment, due to the large changes in the environmental conditions and the varying degrees of pollution and aging over time, the response rate of the detector More or less, there will be some changes, which will affect the authenticity of the obtained information, especially for spaceborne imaging spectrometers, once launched, it is impossible to re-calibrate in the laboratory. In order to solve this proble...

AI Technical Summary

Problems solved by technology

[0005] When the imaging spectrometer works in a harsh environment with dust suspension and extreme temperature changes, a large number of dust particles suspended in the air will pollute the instrument

When the temperature difference is large, thermal stress will be generated, which will destroy the thermal balance of the instrument and affect the stability of the instrument's performance

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