摘要
设计了一种适用于空间环境的变形镜装置,以校正高分辨率空间相机中大口径主反射镜的波像差.讨论了空间相机用变形镜的设计准则,确定了该变形镜的结构形式;给出了具体的结构组成和材料组合,并设计了柔性结构.仿真结果表明,该结构在z向重力工况下RMS值仅17.2nm,4℃温升时的RMS值仅为3.7nm,且一阶频率为1 015Hz,各模拟空间工况下的反射面经主动展平后,均可获得近似的标准平面;该结构能够较准确地拟合前36项泽尼克多项式所对应的基元波面,残留误差较小,不仅具有良好的力学性能和热稳定性,还能保证变形镜的像差校正能力得到充分发挥,从而满足空间相机的使用需求.
In order to calibrate the wave aberration caused by large aperture mirror in htgh resolution space camera, a deformable mirror suitable for space environment was designed. The design cri＊erion of deformable mirror used on space camera was discussed, and the structure form of the deformable mirror was determined; the concrete structure and combination of materials were given, and the flexible structure was added. Simulation results show that, its RMS value is 17.2 nm under z axis gravity and only 3.7 nm when temperature is increased by 4~C, its 1st natural frequency is 1 015 Hz, and after active flattening, the reflecting surface under these simulated space conditions can he corrected to approximate standard plane; it can accurately fit the wave elements corresponding to the first 36 Zernike polynomials, and the residual errors are small. This deformable mirror not only has good mechanical properties and thermal stability, but also can guarantee the aberration correction ability, which meets the application requirement of space camera.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2016年第1期146-150,共5页
Acta Photonica Sinica
基金
国家高技术研究发展计划(No.863-2-5-1-13B)资助~~
关键词
空间光学
变形镜
空间环境适应性
柔性结构
基元波面
Space optics
Deformable mirror
Space environmental applicability
Flexible structure
Wave element
