液晶空间光调制器的波前模拟及波前校正
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摘要
设计并搭建了一种基于复合型液晶空间光调制器(LC-SLM)的自适应光学原理校正系统,其中一个空间光调制器用于波前模拟,另一个用于波前校正。利用Zygo干涉仪对畸变波前进行了检测,通过程序计算获得了畸变波前的共轭波前,产生了相应的灰度图,将其加载到LC-SLM以进行畸变波前补偿,实现了静态波前校正。计算得到的斯特列尔比由校正前的0.3795增大到0.8268,环围灰度平均值由校正前的382.75增大到1164.5,光斑亮度聚集情况明显改善。相比纯相位空间光调制器,复合型空间光调制器节约了成本,适合实验室批量使用。
A kind of adaptive optical principle correction system based on compound liquid crystal spatial light modulator(LC-SLM)is designed and built.One spatial light modulator is used for wavefront simulation and the other for wavefront correction.The Zygo interferometer is used to detect the distorted wavefront.The conjugate wavefront of the distorted wavefront is obtained by the program calculation,and the corresponding gray image is generated,which is loaded into the LC-SLM to compensate the distortion wavefront,and the static wavefront correction is realized.The calculated Stell-ratio increases from 0.3795 before correction to 0.8268,and the mean value of the ring girth gray increases from 382.75 before correction to 1164.5,and the luminance aggregation of the spot is obviously improved.Compared with the pure phase space light modulator,the composite space light modulator saves costs and is suitable for laboratory batch use.
A kind of adaptive optical principle correction system based on compound liquid crystal spatial light modulator(LC-SLM)is designed and built.One spatial light modulator is used for wavefront simulation and the other for wavefront correction.The Zygo interferometer is used to detect the distorted wavefront.The conjugate wavefront of the distorted wavefront is obtained by the program calculation,and the corresponding gray image is generated,which is loaded into the LC-SLM to compensate the distortion wavefront,and the static wavefront correction is realized.The calculated Stell-ratio increases from 0.3795 before correction to 0.8268,and the mean value of the ring girth gray increases from 382.75 before correction to 1164.5,and the luminance aggregation of the spot is obviously improved.Compared with the pure phase space light modulator,the composite space light modulator saves costs and is suitable for laboratory batch use.
引文
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[19]Cheng Y,Huang D J,Fan W.Beam shaping capability of amplitude spatial light modulator by electrical addressing[J].Chinese Journal of Lasers,2017,44(4):0405001.程煜,黄大杰,范薇.电寻址振幅型空间光调制器的光束整形能力[J].中国激光,2017,44(4):0405001.
[2]Farrell T C.Fast simulation of Strehl loss due to phase aberration for the sizing of adaptive optics in laser communications system design[J].Applied Optics,2014,53(1):64-70.
[3]Jiang W H.Overview of adaptive optics development[J].Opto-Electronic Engineering,2018,45(3):170489.姜文汉.自适应光学发展综述[J].光电工程,2018,45(3):170489.
[4]Cheng T,Liu W J,Yang K J,et al.Decoupling control algorithm based on Laplacian eigenfunction for Woofer-Tweeter adaptive optics system[J].Chinese Journal of Lasers,2018,45(9):0905003.程涛,刘文劲,杨康健,等.基于拉普拉斯本征函数的Woofer-Tweeter自适应光学系统解耦控制算法[J].中国激光,2018,45(9):0905003.
[5]Dou R S,Giles M K.Closed-loop adaptive-optics system with a liquid-crystal television as a phase retarder[J].Optics Letters,1995,20(14):1583-1585.
[6]Kirsch J C.Modulation characteristics of the Epson liquid crystal television[J].Optical Engineering,1992,31(5):963-970.
[7]Yao K N,Wang J L,Liu X Y,et al.Closed-loop adaptive optics system with a single liquid crystal spatial light modulator[J].Optics Express,2014,22(14):17216-17226.
[8]Zhang H X,Zhang J,Qiao Y J,et al.Wavefront generation and error compensation of liquid crystal spatial light modulator[J].Journal of Optoelectronics·Laser,2013,24(5):838-842.张洪鑫,张健,乔玉晶,等.液晶空间光调制器波前模拟及误差补偿[J].光电子·激光,2013,24(5):838-842.
[9]Jiang W H.Adapted optical technology[J].Chinese Journal of Nature,2006,28(1):7-13.姜文汉.自适用光学技术[J].自然杂志,2006,28(1):7-13.
[10]Hu L F,Xuan L,Liu Y J,et al.Phase-only liquid crystal spatial light modulator for wavefront correction with high precision[J].Optics Express,2004,12(26):6403-6409.
[11]McKnight D J,Johnson K M,Serati R A.256×256liquid-crystal-on-silicon spatial light modulator[J].Applied Optics,1994,33(14):2775-2784.
[12]McGlamery B L.Restoration of turbulence-degraded images[J].Journal of the Optical Society of America,1967,57(3):293-297.
[13]Zhang H X.Study on testing method of phase liquid crystal spatial light modulator and wavefront correction[D].Harbin:Harbin Institute of Technology,2009:18-22.张洪鑫.相位型液晶空间光调制器特性测试方法及波前校正研究[D].哈尔滨:哈尔滨工业大学,2009:18-22.
[14]Li X Z,Han C S,Wen M,et al.Research on wavefront distortion compensation based on liquid crystal space light modulator[J].Laser&Infrared,2011,41(2):187-191.李祥之,韩诚山,文明,等.基于液晶空间光调制器的波前畸变补偿研究[J].激光与红外,2011,41(2):187-191.
[15]Jin D H.Research on wavefront correction based on stochastic parallel gradient descent algorithm[D].Changsha:University of National Defense Science and Technology,2006:3-4.靳冬欢.基于随机并行梯度下降算法的波前校正技术研究[D].长沙:国防科技大学,2006:3-4.
[16]Vorontsov M A,Carhart G W,Cohen M,et al.Adaptive optics based on analog parallel stochastic optimization:analysis and experimental demonstration[J].Journal of the Optical Society of America A,2000,17(8):1440-1453.
[17]Zhou R Z,Yan J X,Yu X,et al.Adaptive optics[M].Beijing:National Defense Industry Press,1996:15-17.周仁忠,闫吉祥,俞信,等.自适应光学[M].北京:国防工业出版社,1996:15-17.
[18]Wu J L,Ke X Z.Adaptive optics correction of wavefront sensorless[J].Laser&Optoelectronics Progress,2018,55(3):030103.吴加丽,柯熙政.无波前传感器的自适应光学校正[J].激光与光电子学进展,2018,55(3):030103.
[19]Cheng Y,Huang D J,Fan W.Beam shaping capability of amplitude spatial light modulator by electrical addressing[J].Chinese Journal of Lasers,2017,44(4):0405001.程煜,黄大杰,范薇.电寻址振幅型空间光调制器的光束整形能力[J].中国激光,2017,44(4):0405001.