瑞利激光导星自适应系统

来源 :中国物理学会2015年秋季会议 | 被引量 : 0次 | 上传用户:nihaobaobeisss
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  自适应系统在大口径望远镜的成像分辨率中起到至关重要的作用.但是由于明亮的自然导星天空覆盖率低而导致自适应系统受到限制.瑞利激光导星是利用一束向上发射的激光经过大气中瑞利层的后向散射创造出的人造信标,因此天空覆盖率理论上可达到百分之百.基于某一大气条件下设计出一套完善的瑞利导星自适应系统可为日后导星技术提供参考和支持.我们已经通过湍流理论分析出在长春地区瑞利激光导星最佳的发射口径,同时设计了一套完整并且实用的发射系统,利用湍流模拟分析得出后向散射光斑半径为0.84arcsec,与理论值的光斑半径0.82arcsec接近,该导星发射系统可根据实验时大气情况调节发散角,从而调节激光导星的大小,最终使得导星大小满足探测精度的要求.另一方面,瑞利激光导星自适应系统的导星接收部分正在进行中,导星接收部分起到接收并检验瑞利导星质量的作用,同时也可以完成瑞利激光导星自适应系统的波前探测任务.
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