Photoinduced deformation thin film reflector surface shape control and measurement device

Abstract

The invention relates to a photoinduced deformation thin film reflector surface shape control and measurement device, and belongs to the technical field of space optics. In order to solve the problems that an existing photoinduced deformation thin film reflector surface shape control and measurement device is complex in system, a surface shape control system is low in reliability, and the surface shape control accuracy is poor, the photoinduced deformation thin film reflector surface shape control and measurement device is characterized in that lasers transmitted by a laser device pass through a first laser collimating mirror to obtain collimating lasers, then adjustment on the polarization direction and the polarization state is completed through a free space optical isolation device and a polarization state controller to obtain single-polarization-state collimating lasers, the collimating lasers enter a liquid crystal space modulator through a laser splitter prism to conduct small-angle deflection, the deflecting directions of the collimating lasers are changed through a polarization rotator, then the collimating lasers are scanned by a birefringent prism to be output to the surface of a photoinduced deformation thin film to complete thin film tensile deformation, the lasers are scattered back through the photoinduced deformation thin film to enter a second laser collimating mirror through the birefringent prism, the polarization rotator, the liquid crystal space modulator and the laser splitter prism, and the lasers can be gathered through the second laser collimating mirror to reach a photoelectric detector.

Description

technical field [0001] The invention relates to a surface shape control and measurement device of a light-induced deformation thin film mirror, which belongs to the technical field of space optics. Background technique [0002] The space mirror based on the flexible film (referred to as the film mirror) has the advantages of low cost, small storage volume, expandability, light weight, etc., which solves the contradiction between large aperture, launch weight and carrying volume It satisfies the development requirements of ultra-large and ultra-lightweight mirrors. Its related theoretical and technical research has developed rapidly in recent years and has become one of the research hotspots in the field of space technology at home and abroad. It has shown good application prospects in the fields of large-scale space optical systems and antennas. [0003] Existing thin film mirrors can be divided into several categories according to the external force used, such as inflatabl...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the surface shape control and measuring device system of the existing photodeformable thin film reflector is complex, and the two-dimensional pendulum mirror in the surface shape control system will lead to low system reliability and poor surface shape control accuracy, the present invention proposes a Surface Shape Control and Measuring Device of Photodeformable Thin Film Mirror

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