Heterodyne spectrometer grating gluing assembling structure and assembling method

Abstract

The invention discloses a heterodyne spectrometer grating gluing assembling structure and an assembling method. The assembling structure comprises a support base plate, imaging switching plates, collimation switching plates and an L-shaped to-be-glued interference assembly, wherein the upper end and the lower end of the support base plate are each provided with an imaging switching plate to form a vertical surface, the left end and the right end of the support base plate are each provided with a collimation switching plate to form a horizontal surface, the vertical surface and the horizontal surface form a three-vertical-surface reference assembly, and the L-shaped to-be-glued interference assembly is placed on the three-vertical-surface reference assembly. According to the invention, the angle and the tower difference precision of the to-be-glued interference assembly are transmitted and carried on by use of a two-dimensional positioning mechanism, and functions of primary limiting, repeated positioning and high-precision phase error adjustment of grating assemblies are realized by use of a rotation adjustment mechanism and an optical member block. The operation is convenient, the resilience is high, solidification areas are uniform, and the assembling effect of interferogram phase errors can be monitored in real time.

Description

technical field [0001] The invention relates to the technical field of optical system assembly and adjustment, in particular to an assembly structure and an assembly method for grating bonding of a heterodyne spectrometer. Background technique [0002] Spatial heterodyne spectroscopy technology has the characteristics of high throughput, arbitrary selection of wave bands, extremely high spectral resolution and high degree of integration in a narrow spectral range. Gas fine spectral detection has been widely concerned and applied. [0003] Since the heterodyne spectrometer directly acquires the interferogram, and the final required data is the spectral signal, therefore, the phase error of the interferogram zero optical path difference greatly affects the quality of the spectral signal, and the zero optical path difference phase error also affects the quality of the spectral signal. It brings great difficulties to the correction of the phase error of the subsequent interfere...

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Problems solved by technology

[0004] Application No. 200910185001.7 (Notice No. CN 101699328 B "An Assembly and Adjustment Mechanism for Grating Bonding in a Spatial Heterodyne Interferometer") introduces an assembly and adjustment structure for grating bonding, in which the two-dimensional adjustment mechanism will also The introduction of tower error reduces the quality of the interference signal; due to the light weight of the grating, the method of squeezing the roller by gravity is limited to a certain extent, resulting in poor recoverability of the adjustment mechanism for the grating line direction; after the grating adjustment is completed During the curing process, the exposed part of the grating and the grating spacer glued area is less exposed to ultraviolet light, and the curing time is longer

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