光学 精密工程, 2013, 21 (6): 1387, 网络出版: 2013-07-01   

961单元自适应光学系统波前处理器

961-element adaptive optical wave-front processor
作者单位
1 中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
2 中国科学院大学,北京 100049
摘要
针对大型地基高分辨率成像望远镜对自适应光学系统波前处理器在输出规模、处理速度和控制带宽方面的要求,研制了千单元级自适应光学系统。设计了一种由主控计算机、波前处理主板和可扩展的波前处理子板相结合,输出规模最大可达1 200单元的自适应光学系统波前处理器。采用大规模逻辑器件作核心处理芯片,用多线并行流水算法缩短波前处理延时,提高系统控制带宽。对设计完成的波前处理器进行了基于961单元变形镜的开环展平实验以及基于137单元变形镜的闭环校正实验。实验结果显示:系统最高采样帧频为2 000 frame/s 时,波前运算延时为20.96 μs,表明文中提出的硬件扩展和多路并行流水算法对于大规模自适应光学系统波前处理可行且有效。
Abstract
In consideration of the requirements of a large ground-based high resolution imaging telescope for the Wave-front Processor (WFP) of an adaptive optical system in output scales, processing speeds and control bandwidths, an adaptive optical system with thousand elements was explored. The adaptive optical WFP was composed of a master control computer, a wave-front processing host board and expandable wave-front processing sub boards and its output scale could reach the maximum of 1 200 elements. Large-scale logic devices were adopted as main processing chips, and a multithreading parallel pipeline algorithm was used to shorten the wave-front processing delay and promote the controlling bandwidth of the system. Then, an open loop experiment based on 961-element deformable mirror and a closed corrected experiment based on 137-element deformable mirror were performed. The result shows that the wave-front processing delay is 20.96 μs when the maximum sampling rate is 2000 frame/s,which demonstrates that the hardware expending circuit and multithreading parallel pipeline algorithm are feasible and effective for the wave-front processing of the adaptive optical systems.

贾建禄, 王建立, 赵金宇, 刘欣悦, 李洪文, 王亮, 林旭东, 赵雨菲. 961单元自适应光学系统波前处理器[J]. 光学 精密工程, 2013, 21(6): 1387. JIA Jian-lu, WANG Jian-li, ZHAO Jin-yu, LIU Xin-yue, LI Hong-wen, WANG Liang, LIN Xu-dong, ZHAO Yu-fei. 961-element adaptive optical wave-front processor[J]. Optics and Precision Engineering, 2013, 21(6): 1387.

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