为了提高液晶自适应光学系统的校正精度，提出一种基于湍流模型的响应矩阵测量方法。该方法施加到液晶波前校正器上的波面是用来拟合待测像差的Karhunen-Loeve模式的线性组合，其模式系数分布服从Kolmogorov大气湍流模型。相比于传统的单模式和多模式响应矩阵测量方法，该方法具有更强的抗噪声干扰能力，能够显著提高响应矩阵测量精度。在信噪比为10的情况下，当重复率分别为1、5和10时，采用传统单模式法和多模式法获得的响应矩阵进行自适应校正后的斯特列耳比分别为0.06、0.02、0.49和0.23、0.40、0.67，而采用该方法可以达到0.34、0.56、0.68。
Abstract
In order to improve the correction accuracy of liquid crystal (LC) adaptive optical systems, a method based on turbulence model for measuring the interaction matrix (IM) was proposed. The wavefronts applied to the LC corrector are the linear combination of Karhunen-Loeve modes which are used to fit the measured aberrations and the coefficients of these modes obey the Kolmogorov atmospheric turbulence model. Comparing with traditional single mode and multiple modes method, the new method has a stronger anti-noise ability and can produce a significant improvement on IM measurement. Under the condition of the signal-to-noise ratio (SNR) of 10, when the repetition rate is 1, 5 and 10, respectively, the corresponding Strehl ratio is 0.06, 0.02, 0.49 and 0.23, 0.40, 0.67, corrected by using the IM obtained with the tradional single mode method and multi-mode method, respectivily, while that of the new method can reach 0.34, 0.56, 0.68.
关键词
自适应光学系统 /
大气湍流 /
液晶 /
响应矩阵
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Key words
interaction matrix /
adaptive optics systems /
atmospheric turbulence /
liquid crystal
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参考文献
周仁忠, 阎吉祥.自适应光学理论[M].北京:北京理工大学出版社, 1996.
陈力子, 景春元, 谭碧桃, 等. 600 mm自适应望远镜最佳子孔径数仿真研究[J].应用光学, 2009, 30(1):25-28.
姜文汉, 张雨东, 饶长辉, 等.中国科学院光电技术研究所的自适应光学研究进展[J].光学学报, 2011, 31(9):0900106.
曹召良, 李小平, 宣丽, 等.液晶自适应光学的研究进展[J].中国光学, 2012, 5(1):12-19.
刘超, 孔宁宁, 胡立发, 等.液晶自适应光学系统中控制矩阵的精确测量[J].光学精密工程, 2009, 17(12):2899-07.
李新阳, 姜文汉, 王春红, 等, 湍流大气中哈特曼传感器的模式波前复原误差[J].强激光与离子束, 2000, 12(2):0149-06.
Zhou Renzhong, Yan Jixiang. Adaptive optics theory[M]. Beijing: Beijing Institute of Technology Press, 1996.
Chen Lizi, Jing Chunyuan, Tan Bitao, et al. Optimum subapertures of 600 mm adaptive optical telescope[J]. Journal of Applied Optics.2009, 30(1):0025-04.
Jiang Wenhan, Zhang Yudong, Rao Changhui, et al. Progress on adaptive optics of institute of optics and electronic, chinese academy of sciences[J]. Acta Optica Sinica.2011, 31(9):0900106.
Kasper M, Fedrigo E, Looze D P, et al. Fast calibration of high-order adaptive optics systems[J]. Journal of the Optical Society of America Optics Image Science and Vision, 2004, 21(6):1004-1008.
Guo Youming, Rao Changhui, Bao Hua, et al. Multichannel-hadamard calibration of high-order adaptive optics systems[J]. Optics Express, 2014, 22(11):13792-13803.
Hu Lifa, Li Xuan, Liu Yongjun, et al. Phase-only liquid crystal spatial light modulator for wavefront correction with high precision[J]. Optics Express, 2004, 12(26):6403-6409.
Cao Zhaoliang, L
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脚注
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