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
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.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2001年第8期933-938,共6页
Acta Optica Sinica
基金
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
