A ground-based f-p wind interferometer

Abstract

The invention relates to a foundation F-P wind measuring interferometer which comprises a laser (11), a scattering box (3), a two-dimension scanning reflector (1), an etalon (4), a receiving system (4) and an imaging objective (2). The imaging objective (2) comprises a beam contracting system (6), an optical filter wheel (5) and a focus control mirror set (19). The etalon (4), the beam contracting system (6), the optical filter wheel (5) and the focus control mirror set (19) are sequentially and coaxially arranged in the light outputting direction. The beam contracting system (6) is used for reducing the caliber of an interference light beam, and the optical filter wheel (5) is used for controlling a spectral bandwidth. The focus control mirror set (19) is used for controlling the focal length of the imaging objective and imaging the interference light beam to an image surface, and therefore an interference ring is generated. With the structure, the size of an optical filter will not be increased when the system SNR is improved either in the manner of reducing the focus length or in the manner of increasing the caliber of the etalon, and therefore cost is reduced, and processing difficulty is lowered.

Description

Technical field [0001] The invention relates to the technical field of wind field measurement, in particular to a ground-based F-P wind measuring interferometer. Background technique [0002] The ground-based F-P (Fabry-Perot) wind measuring interferometer is an instrument that uses the principle of Doppler frequency shift to measure the wind field in the middle and upper atmosphere. The middle and upper atmosphere wind field is a very important index parameter of the space environment. It can be used to study the aerodynamic characteristics of the geothermal layer. Various fluctuations in the wind field (tidal waves, planetary waves, gravity waves, etc.) transmit energy and momentum in the atmosphere. It plays an important role in the atmosphere, which widely affects the changes of atmospheric circulation and atmospheric structure. Because of the high spectral resolution, simple structure and long detection distance of the Fabry-Perot wind interferometer, it has been widely use...

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to solve the problems of the above three kinds of ground-based F-P wind interferometers with complex structure, large instrument volume, or the difficulty and high cost of production due to the use of large-diameter filters. The present invention provides a A compact ground-based F-P wind interferometer, which changes the optical structure of the above three ground-based F-P wind interferometers, does not have a complicated front optical system, reduces the overall size and weight, and reduces production costs, which is beneficial to the instrument Arrangements at various observatories

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