变形镜交连值的优化分析  

Optimizational Analysis of Deformable Mirror's Coupling

作　　者：卢飞[1] 何忠武[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《计算机仿真》2012年第4期38-42,共5页Computer Simulation

基　　金：中国工程物理研究院科学技术发展基金(2009A0401023);中国工程物理研究院科学技术发展基金(2011B0401069)

摘　　要：关于优化光波控制,自适应光学校正是至关重要的一个环节,可用于改善激光光束质量及校正光束在传输过程中气流引起的波前畸变等。变形镜是其核心器件,而交连值是影响变形镜校正精度的关键因素。针对变形镜实际使用时需要对致动器进行一定的约束,利用带约束的最小二乘法,分析了在一定约束条件下交连值变化对变形镜校正精度及控制稳定性的影响。以Zernike像差和以大气湍流模型构造的像差为校正对象,寻找校正效果最好的交连值。结果表明各阶Zernike像差对应的最优交连值差异较大,最优交连值主要分布在15%～35%之间。从控制误差引起的校正效果变化的方面考虑,对正方形致动器排布的最优交连值位于15%～25%区域。In intense laser application field,adaptive optical correction is a vital step,and it can improve quality of laser emission beam and also be used to calibrate wavefront distortion cased by the airstream during transmission.Deformable mirror is a core device of the adaptive optical system,and the coupling coefficient is a key factor affecting the deformable mirror＇s fitting precision.On account of certain constraints needing to be applied on actuators in actual use of deformable mirror,with constrained least squares,this paper simulated and analyzed the influence of mirror＇s coupling coefficient to the precision of fitting and control stability.With Zernike aberration and aberration constructed by the model of atmospheric turbulence as the object to be corrected,the best coupling coefficient obtaining the minimum fitting error was found.The simulation results show that the best coupling coefficients are closely dependent on the order of Zernike aberration,mostly locate between 15% and 35%.In view of correction effect＇s becoming worse because of control error,the optimization coupling coefficient for square range of actuators locates between 15% and 25%.

关 键 词：变形镜 致动器约束 拟合精度 交连值 控制稳定性 

分 类 号：O439[机械工程—光学工程]