| 自适应光学系统对实际大气湍流波前的时域校正效果 |
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| 引用本文： | 饶长辉,姜文汉,凌宁,汤国茂,沈锋,张学军,陶慧敏.自适应光学系统对实际大气湍流波前的时域校正效果[J].光学学报,2001,21(8):33-938. |
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| 作者姓名： | 饶长辉 姜文汉 凌宁 汤国茂 沈锋 张学军 陶慧敏 |
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| 作者单位： | 中国科学院光电技术研究所, |
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| 基金项目： | 国家科委 863高科技项目，国家自然科学基金(6990 80 0 6)资助课题 |
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| 摘 要： | 引入时域校正因子（系统团环校正波前残余误差与系统开环时的湍流波前扰动误差之比）和系统测量信噪比，分析了自适应光学系统对实际大气湍流扰动的时域校正效果与湍流功率指数、湍流功率谱转折频率、系统测量信噪比、系统时间延迟以及系统闭环带宽的关系，并给出了系统的最佳闭环带宽。此外还分析了弱光61单元自适应学系统的时域校正效果。
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| 关 键 词： | 自适应光学系统 大气湍流 噪声 功率谱 闭环带宽 信噪比 时域校正因子 |
Temporal Correction Effectiveness of Adaptive Optical System for Light Wave Atmospheric Propagation |
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| Rao Changhui,Jiang Wenhan,Ling Ning,Tang Guomao,Shen Feng\ Zhang Xuejun\ Tao Huimin.Temporal Correction Effectiveness of Adaptive Optical System for Light Wave Atmospheric Propagation[J].Acta Optica Sinica,2001,21(8):33-938. |
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| Authors: | Rao Changhui Jiang Wenhan Ling Ning Tang Guomao Shen Feng\ Zhang Xuejun\ Tao Huimin |
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| Abstract: | By introducing the temporal correction coefficient, which is defined as the ratio between the closed loop wavefront residual error and the open loop error induced by atmospheric turbulence, and the measured signal to noise ratio, the temporal correction effectiveness of adaptive optical system for light wave atmospheric propagation is studied. Its dependence on the power law exponent of the turbulence, the cut off frequency, the measured signal to noise ratio, the time delay and the closed loop bandwidth is analyzed. The optimal closed loop bandwidth is given. The temporal compensation effectiveness of 61 element weak light adaptive optical system is also analyzed. |
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| Keywords: | adaptive optics atmospheric turbulence noise power spectrum closed loop bandwidth signal to noise ratio temporal correction coefficient |
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