Low-temperature high-stability supporting structure for installing reflective optical grating

Abstract

The invention discloses a low-temperature high-stability supporting structure for installing a reflective optical grating. The low-temperature high-stability supporting structure comprises an optical grating pressing plate, an optical grating substrate, an elastic pressing piece and a ball plunger; the back of the reflective optical grating is fixed with the optical grating substrate in a single-point bonding mode, the optical grating substrate is embedded in the mounting groove of the optical grating pressing plate, and positioning of the optical grating substrate in the X direction and the Y direction is achieved through ball plungers arranged in the groove walls of the two sides of the mounting groove; Z-direction pre-tightening force is provided for the optical grating substrate through the elastic pressing plate, and positioning of the optical grating substrate in the Z direction is achieved under the action of the elastic pressing plate and the installation datum plane of the groove bottom of the installation groove. According to the supporting structure, the reflection optical grating and the optical grating pressing plate structure are effectively isolated while the supporting precision is guaranteed, deformation under the temperature load effect is absorbed and buffered by a flexible structure, the reflection optical grating is hardly subjected to acting force changing along with the temperature, the surface shape precision of the grating surface is effectively guaranteed, and the temperature stability of a system is achieved.

Description

technical field [0001] The invention belongs to the field of optical engineering and relates to a supporting structure, in particular to a low-temperature and high-stability supporting structure used for installation of reflective gratings. Background technique [0002] In the field of optical engineering, optical-mechanical systems, especially infrared optical-mechanical systems, are very sensitive to environmental conditions. In order to reduce the impact of thermal background radiation on the system, it is usually necessary to cool down the entire infrared optical-mechanical system and perform radiation suppression and heat insulation treatments. , to ensure the temperature stability of the optical system. Due to the impact of violent fluctuations in the ambient temperature of the low-temperature optomechanical system, the structural components and optical components will be squeezed and deformed due to the mismatch of thermal expansion coefficients between the connecting...

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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