A low temperature and high stability support structure for reflective grating installation

Abstract

The invention discloses a low-temperature and high-stability support structure for reflective grating installation, comprising a grating pressing plate, a grating substrate, an elastic pressing sheet and a ball-head plunger; the back of the reflective grating is connected to the grating substrate by single-point bonding Fixed, the grating substrate is embedded in the installation groove of the grating pressure plate, and the positioning of the grating substrate in the X and Y directions is realized by the ball-head plungers arranged in the groove walls on both sides of the installation groove; the elastic pressure plate provides Z to the grating substrate Under the action of the elastic pressure plate and the installation reference surface of the bottom of the installation groove, the positioning of the grating substrate in the Z direction is realized. The support structure effectively isolates the reflection grating from the grating pressure plate structure while ensuring the support accuracy. The deformation under the action of temperature load is absorbed and buffered by the flexible structure, and the reflection grating is hardly subjected to the force that changes with temperature, effectively guaranteeing The surface shape accuracy of the grating is improved, and the temperature stability of the system is realized.

Description

Technical field [0001] The present invention is an optical engineering field, which involves a support structure, which specifically involves a low -temperature and high stability support structure for reflected grating installation. Background technique [0002] In the field of optical engineering, the optical machine system, especially the infrared light machine system, is very sensitive to the environmental state. In order to reduce the effects of heat background radiation on the system, the overall cooling of the entire infrared light machine system is required , Ensure the temperature stability of the optical system. Due to the influence of the ambient temperature of the low -temperature light machine system, structural components and optical components will cause squeezing deformation due to the non -matching coefficient between the connected components, which causes thermal stress, resulting in a rigid displacement of optical components, changes in optical surface surface ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that most of the low-temperature support structures of reflective gratings for low-temperature environments are relatively complex and cannot well control the surface shape changes of optical elements, which will cause the system interference fringes to be inclined and bent, and the modulation degree will be reduced, which will affect the system performance. The present invention provides A low-temperature high-stability support structure for reflective grating installation

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