摘要
提出了一种可以实现自适应光学系统中哈特曼传感器与变形镜对准的方法。该方法通过给用来做标记的驱动器施加电压来表征变形镜的位置,利用哈特曼探测变形镜镜面面形的斜率分布信息获取驱动器的准确位置,并据此计算哈特曼传感器和变形镜之间位置失配,为二者的自动对准提供依据;阐述了该方法的对准原理,推导了哈特曼和变形镜之间位置失配计算公式;以45单元自适应光学系统为例,展开对该对准方法的模拟仿真。结果表明:当二者的平移失配和旋转失配误差小于2倍子孔径大小和小于10°时,测量误差分别小于子孔径大小的5%和0.15°,能够准确测量自适应光学系统中哈特曼传感器和变形镜之间的位置失配。
An alignment method for Hartmann-Shack sensor （HS） and deformable mirror （DM） was proposed to enhance the ability of wavefront control in adaptive optics system. The shape of DM after exerting voltages on some actuators would be detected by HS, and then the center position of these marked actuators and the misalignment error between HS and DM could be calculated according to the gradient distribution of DM. Based on the proposed method, the auto-alignment between HS and DM could be carried out. The alignment principle of this proposed method was expounded and some formulas for calculating the misalignment were derived. The numerical simulation based on the 45-elements adaptive optics system was also implemented to prove the accuracy of this proposed method. The result shows that the maximum error is 5% when the misalignment is less than 2 times of sub-aperture size at x and y direction and 0.15° when the misalignrnent is less than 10° at z rotation between HS and DM.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第2期287-292,共6页
Infrared and Laser Engineering
基金
国家863基金资助项目
关键词
自适应光学
哈特曼传感器
变形镜
对准误差测量
adaptive optics
Hartmann-Shack sensor
deformable mirror
misalignment measurement
