Wide-angle Michelson interferometer and wind field detecting method based on LCoS

Abstract

The invention discloses a wide-angle Michelson interferometer and a wind field detecting method based on LCoS. The wide-angle Michelson interferometer comprises a tetrahedral beam splitting prism, wherein the beam splitting prism is formed by cementing a right-angled triple prism a and a right-angled triple prism b which are made of the same material and have the same refractive index at a slope, a semireflecting and semitransparent film is plated on a cemented surface, a tetragonal glass cube a is cemented at one side of the right-angled triple prism a, a polaroid sheet is pasted at the other side of the glass cube a, an LCoS reflective liquid crystal is pasted at the other side of the polaroid sheet, a glass cube b is cemented at one side of the right-angled triple prism b, a total reflecting film is plated at the top of the glass cube b, and the glass cube b and the glass cube a are adjacently arranged. The wind field detecting method comprises the steps of applying different voltages onto the LCoS reflective liquid crystal for modulating the phase position of incident light and providing stepping phase positions for light with different wavelengths so as to detect an atmospheric wind field. The interferometer and the wind field detecting method have small power consumption, good anti-seismic performance and considerable cost.

Description

technical field [0001] The invention belongs to the technical field of interferometric detection of the upper atmosphere, in particular to an LCoS-based wide-angle Michelson interferometer, and also relates to a method for detecting atmospheric wind fields using the interferometer. Background technique [0002] The existing theory of using optical remote sensing to passively detect the upper atmospheric wind field often uses the wide-angle Michelson wind imaging interferometer WINDII (Wind Interferometer Imaging) to passively detect the upper atmospheric wind field. WINDII uses the "four-intensity method" to detect the upper atmospheric wind field. field, its key technology is to use piezoelectric ceramic micro-displacement drive technology to move the mirror of one arm of the Michelson interferometer step by step to produce a quarter-wavelength step optical path difference, and use CCD to obtain 4 images with different interference intensities The image is used to retrieve ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wide-angle Michelson interferometer based on LCoS, which solves the problem that the detection accuracy of the existing Michelson interferometer is not high when the multi-band auroral detection is carried out

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