Calibration turntable special for spectrograph

Abstract

A calibration rotary table special for a spectrograph comprises a base and a table body, and the table body comprises a pitch axis system and an azimuth axis system; the pitch axis system is used for completing vertical swing, the azimuth axis system is used for completing horizontal rotation, and the pitch axis system is fixed to the azimuth axis system; and the two axis systems both use independent driving systems, driving torque is provided through a motor, and a speed reducer is used for reducing the rotating speed and amplifying the torque. According to the invention, the relative position angle change of a spaceborne spectrograph and the sun in orbit can be simulated, and high-precision rotation of 360 degrees in the horizontal direction and + / -20 degrees in the vertical direction is realized; due to the design of a rotary frame of a calibration rotary table, calibration in two view field directions of a solar calibration light path and an earth observation light path of the spaceborne spectrograph can be realized, and the consistency of radiation calibration of the two light paths is ensured.

Description

technical field [0001] The invention relates to the technical field of spectrometers, in particular to a dedicated calibration turntable for spectrometers. Background technique [0002] Satellite remote sensing monitoring technology has the characteristics of global coverage, multi-spectrum, and large amount of information. It can reflect the changes in the atmospheric environment in a wide range in real time, and is one of the important ways to obtain environmental information. The spaceborne spectrometer has two observation optical paths, the field of view of the earth observation optical path is 114°, and the field of view of the solar observation optical path is 14°. It detects the ultraviolet rays reflected and scattered by the earth's atmosphere or the surface through the nadir push-broom working method. / Visible light radiation, obtain spectral information, and use differential absorption spectroscopy to quantitatively invert the global distribution of atmospheric tr...

AI Technical Summary

Problems solved by technology

[0005] The three-dimensional adjustment mechanism such as figure 1 As shown, the core problem is that the spectrometer can only be installed horizontally, and the calibration light source is controlled by the rotating arm to test the optical path of the earth observation, which cannot meet the calibration test requirements of the optical path of the sun observation;

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