Double-view-field near-infrared Doppler differential interferometer

Abstract

The invention provides a double-view-field near-infrared Doppler differential interferometer, and solves the problems of large equipment size and high cost in simultaneous detection of wind fields intwo directions of a 60-80km stratosphere. The interferometer provided by the invention comprises a double-view-field front imaging coupling system, an interferometer, a stripe imaging lens and a detector which are sequentially arranged along a light path, wherein the double-view-field front imaging coupling system is an image space telecentric system with a middle image plane, the F number of thedouble-view-field front imaging coupling system is 15, and the double-view-field front imaging coupling system comprises a first front subsystem, a second front subsystem and a front coupling system shared by emergent light of the first front subsystem and emergent light of the second front subsystem; the first front subsystem and the second front subsystem introduce incident light of two fields of view perpendicular to each other into the front coupling system, and interference fringes of the two fields of view are formed on the target surface of the detector after the incident light sequentially passes through the interferometer and the fringe imaging lens; and the fringe imaging lens is a finite conjugate distance imaging system with telecentric object space and telecentric image space,the paraxial magnification of the fringe imaging lens is -0.3, and the F number of the fringe imaging lens is 4.5.

Description

technical field [0001] The invention relates to spectrum detection technology, in particular to a dual-field near-infrared Doppler differential interferometer. Background technique [0002] Traditional atmospheric wind field detection technologies mainly include Fabry-Perot interferometric wind field detection technology and wide-angle Michelson interferometer wind field detection technology. The former has high resolution and high sensitivity, but requires very high processing and adjustment accuracy; The latter requires an optical path difference scanning device and can only detect one spectral line at a time. Doppler differential interferometry is a new type of fine spectral detection technology, which has the advantages of high spectral resolution, high throughput, and high stability. [0003] The target source of traditional atmospheric wind field detection technology is the upper atmospheric airglow located in the visible light band of 80-300km. For the stratosphere ...

AI Technical Summary

Problems solved by technology

Since the inversion of the wind velocity vector requires vector synthesis of the wind velocity in two directions, it is necessary to detect the atmospheric wind field in two directions. The existing Doppler differential interferometer can only realize the detection of the atmospheric wind field in one direction. To detect the atmospheric wind field in two directions requires two Doppler differential interferometers to detect simultaneously, which makes the overall equipment larger in size and higher in cost

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