"探索变厚变曲率反射镜在空间相机中的应用与优化"

Variable curvature mirrors are active optical elements that dynamically control wavefronts by changing their curvature radius. This paper provides a comprehensive review of the current status and development trends of variable curvature mirrors both domestically and internationally. A physical model for variable thickness variable curvature mirrors is established in order to analyze the mechanism that balances large center deformation with high surface shape precision. The performance of the mirrors is validated through experiments that maintain surface shape accuracy during deformation. Furthermore, this paper explores the application of variable thickness variable curvature mirrors in space optical cameras from three perspectives. Firstly, in response to the requirements for large center deformation in high magnification zoom imaging, a mirror optimization process based on finite element iteration and superimposition of high-order spherical aberration is designed to achieve mirror designs with sub-millimeter center deformation. Secondly, for the imaging requirements of space optical cameras in terms of focusing accuracy and speed, a high-precision large dynamic focusing method based on variable curvature sub-mirrors is proposed. Finally, a coding imaging method is presented that utilizes rapid scanning along the optical axis of variable curvature sub-mirrors within an integration time. In conclusion, the advancements in variable thickness variable curvature mirrors and their applications in space optical cameras have the potential to greatly improve imaging performance and capabilities. Further research and development in this area will continue to push the boundaries of optical technology and lead to enhanced imaging systems for space exploration and observation.