Interferometer shear amount on-line detection system

Abstract

The invention discloses an on-line detecting system for shearing displacement of an interferometer, which relates to on-line detecting and real-time monitoring of shearing displacement in an assembling and gluing process of a spectral imager interferometer assembly. The on-line detecting system comprises a light source system, a scanning module, a Fourier system and a signal acquiring and processing unit, wherein the scanning system is arranged on an emergent light path of the light source system; the Fourier system is arranged on the emergent light path after getting through the scanning system; and the signal acquiring and processing unit is arranged on a focal plane of the Fourier system. The invention provides the on-line detecting system for shearing displacement of the interferometer, which can be used for directly and real-timely measuring the shearing displacement of the interferometer, and has high precision, strong instantaneity, high stability and an extensive application range.

Description

technical field [0001] The invention belongs to the field of optics, and relates to an on-line detection system for the shear amount of a space modulation interferometer, in particular to the on-line detection and real-time monitoring of the shear amount during assembly and gluing of spectral imager interferometer components. Background technique [0002] Our country is a big country with frequent natural disasters. Due to our vast territory, almost all kinds of natural disasters that occur on the earth exist in our country. Every natural disaster causes heavy casualties and huge economic losses. In environmental disaster monitoring, spectral imagers play an indispensable role. Its biggest feature is the "integration of graphs and spectra", that is, it can not only obtain the spatial information of the target, but also the spectral information of the target; for targets with similar shapes but different textures, and targets with extremely small individuals and clusters, it ...

AI Technical Summary

Problems solved by technology

[0005] The traditional method of detecting the shear amount of the interferometer is to install a converging lens behind the interferometer assembly, use a CCD to receive it on its focal plane, and process the interferogram collected by the CCD to calculate the shear amount of the interferometer. Due to the traditional measurement The method is post-processing, and the shear amount of the interferometer cannot be obtained in real time. Therefore, the traditional measurement method has low measurement efficiency and brings great difficulties to the interferometer installation and adjustment, especially in the fine adjustment stage of the interferometer. It takes a week and repeated adjustments to adjust the shear amount of the interferometer to the design value, and the real-time performance is poor; after that, it is necessary to intermittently monitor whether the shear amount changes during the curing process of the interferometer

Therefore, repeated measurement of the interferometer shear is inseparable from each step of the interferometer's rough packaging, hardcover, sealing, and curing. The traditional measurement method is cumbersome, low in efficiency, and low in accuracy, which seriously affects the work. efficiency

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