Front-mounted optical system of satellite-borne differential absorption spectrometer
A pre-optical system and differential absorption technology, applied in the field of optical measurement, can solve the problems of large volume of the overall optical system, difficult processing and assembly, small field of view, etc., and achieve the effect of small overall volume, improved imaging effect, and compact design
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[0019] The optical system design of the spaceborne atmospheric trace gas differential absorption spectrometer should not only consider the working wavelength range, performance, volume and quality, but also consider the working stability of the system in the space application environment. Therefore, the front optical system of the present invention is preferably a reflective system.
[0020] Such as figure 1 , 2 As shown, the front optical system of the spaceborne differential absorption spectrometer of the present invention is provided with an entrance pupil diaphragm 1, and the subsequent optical path of the entrance pupil diaphragm 1 is sequentially provided with a telescope main mirror 2, a polarizer 3, an aperture diaphragm 4, and a telescope Secondary mirror 5, field diaphragm 6, relay mirror 7 and spectrometer entrance slit 8 (focal plane of front optical system). Wherein the telescope primary mirror 2 and the telescope secondary mirror 5 form a telecentric light path...
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