基于模拟退火的连续膜变形镜最优模式复原  

Modal reconstruction of continuous membrane deformable mirrors based on simulated annealing

作　　者：童桂[1] 廖文和[1] 梁春[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《激光技术》2008年第5期517-520,共4页Laser Technology

基　　金：国家八六三高技术研究发展计划资助项目(2006AA020804)

摘　　要：为了改善小形变量、镜面控制耦合及其影响函数受到光学系统误差等多种因素的影响的连续膜变形反射镜容易出现波前复原控制电压往往超出了可行域范围的问题,提出采用一种基于模拟退火的波前模式复原算法,其原理通过遍历整个可行域搜索域内最佳的模式控制电压组合,使得目标函数以一定概率达到全局最优,从而得到将入射畸变波前像差的影响降到最小的结果。为了验证和比较模拟退火算法的可行性和准确度,采用了任一人眼波前畸变像差作为自适应光学系统的入射畸变波前,得到的残余波前像差小于直接法、闭环迭代算法的复原误差。结果表明,基于模拟退火的波前模式复原算法具有良好的波前复原性能,并且可结合影响函数的非线性特征描述,为连续膜波前复原控制问题提供一种新的解决途径。Owing to small and coupled response of control channels of the continuous membrane deformable mirror（CMDM） and effect of system error on the its influence function,sometimes,the control voltage of wavefront modal reconstruction is beyond the the control voltage range. The modal reconstruction of wavefront based on the simulated annealing was put forward,which was used to find the optimal control voltages of the CMDM through verifying the total solutions in the feasible field. By the way the target function can be optimal and influence of incidence aberration can be reduced to minimum. Initial aberration of the adaptive optics can be replaced by the random wavefront aberration of human eye. Compared to the ways such as direct-solution or close- loop ,the simulated annealing have prefer precision, credibility and least residual error. Because this algorithm has some better performance to reconstruct the incident wavefront, and refers to the nonlinear responses of the influence function, a new solution to correct the wavefront aberration by the CMDM is found.

关 键 词：物理光学 自适应光学 连续膜变形反射镜 模拟退火 模式复原 最优 

分 类 号：O436[机械工程—光学工程]