摘要
利用直接波前斜率法和变形镜的电压 -面形响应特性 ,研究了常规自适应光学系统和共光路 /共模块 (CP/CM)自适应光学系统中哈特曼波前传感器与变形镜的对准误差。常规自适应光学系统中 ,可以用重新测量变形镜的影响函数以减小对准误差的影响 ,虽并不能消除其影响 ,但系统都会有很大的调整容差 ;共光路 /共模块自适应光学系统中采用不同的双哈特曼数据处理方法 ,哈特曼波前传感器与变形镜的对准精度对系统校正能力影响是不同的 ,采用加修正因子斜率融合法和电压融合法由于在数据融合时考虑了两台哈特曼传感器与变形镜对准的差异 ,所以对准误差的影响与在常规自适应光学中相同 ,系统都会有很大的调整容差 ,而采用直接斜率融合法的共光路 /共模块系统由于是建立在两台哈特曼传感器完全一致的假设基础上 ,所以对对准精度的要求是很高的。分析过程中给出了相应的数值计算结果。
The misalignment errors of Hartmann-Shack (H-S) wavefront sensor and deformable mirror in adaptive optics system and Common Path/Common Mode adaptive optics system are studied, by using the directly wavefront slope method and the voltage-surface characteristic of deformable mirror. In the adaptive optics system, re-measurement of the deformable mirror′s response functions would decrease the effects of adjustment error and the system has large tolerance; while in the Common Path/Common Mode adaptive optics system, adjustment errors would have different effects on the compensation performance of the system, because different data fusion method is used. Modified slope fusion method and voltage fusion method have taken the difference of the matching relationships of two H-S sensors and deformable mirror into consideration, so the effects of adjustment errors are the same with those of the normal adaptive optics system. The systems have large tolerance too. Higher precision of adjustment is required when the directly slope fusion method is used because it is base on the assumption that the relationships of two H-S sensors and deformable mirror are completely identical. The numerical results are given in the course of analyzing.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2003年第6期750-755,共6页
Acta Optica Sinica
