Method for detecting adhesion between spatial heterodyne interferometer gratings

Abstract

The invention discloses a method for detecting adhesion between spatial heterodyne interferometer gratings, which relates to the field of optical instruments. The method comprises the steps that: a heterodyne interferometer to be adhered is vertically placed on a transparent platform of an adhesion regulation mechanism; laser lights output by a laser are subjected to diffuse reflection of an integrating sphere to form a uniform surface light source and are incident to an alignment system to form parallel lights which are incident on the heterodyne interferometer to be adhered; interference fringes are formed on an exit end of the heterodyne interferometer to be adhered, wherein the interference fringes are received by a CCD after passing through an image system and are displayed on a computer in real time; fx interference fringes formed on the whole image surface width w1 of the CCD by a special wavelength light source lambda 0 after the special wavelength light source lambda 0 passes through an interference system are calculated; a photosensitive adhesive is uniformly coated on the heterodyne interferometer to be adhered, micro-adjustment is performed on oblique angles of alpha and beta of two arm gratings, and the interference fringes on the whole image surface of the CCD are read till f changes to fx to enable the two gratings to be positioned; and two adhered gratings are cured. The method for detecting adhesion between the spatial heterodyne interferometer gratings solves the technical problem of difficult accurate control over the grating oblique angle in the adhesion process of the spatial heterodyne interferometer. The error of the oblique angels of the two arm gratings can be controlled in 2.5 seconds.

Description

technical field [0001] The invention relates to the field of optical instruments, in particular to a gluing detection method for spatial heterodyne interferometer gratings. Background technique [0002] The spatial heterodyne spectrometer can obtain extremely high spectral resolution within a narrow spectral bandwidth, and the interferometer is the core component of the spatial heterodyne spectrometer. The asymmetry of the inclination angles of the two-arm gratings in the spatial heterodyne interferometer is caused by the angle manufacturing errors of the front prisms, optical inhomogeneity and so on. [0003] Since the inclination angle of the two-arm grating of the spatial heterodyne interferometer directly determines the spectral range Δλ and spectral resolution δλ of the interferometer, when the inclination angle of the two-arm grating is not at the theoretically calculated value during the gluing process, the interferometer will be lost to a certain extent. The spectra...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for gluing the grating of a spatial heterodyne interferometer to solve the problem in the prior art that the inclination angle of the two arms of the spatial heterodyne interferometer is difficult to accurately control

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