摘要
改进了泽尼克模式波前重构数值模拟方法,避免了传统方法中大量的面积分运算,对准直光束瞬态热晕效应模式法自适应光学校正进行了数值模拟研究。数值模拟结果表明,由于模式混淆误差的影响,使泽尼克重构模式阶数的选择受限,即存在一个最大的重构模式阶数,大于该模式阶数会导致校正效果迅速变差,且最大模式阶数的大小与热晕强度无关。对于子孔径分布为8×8的69单元自适应光学系统,最大模式阶数为37阶;同直接斜率法相比,泽尼克模式法可以通过重构模式选择,提高自适应光学系统对热晕校正的稳定性,抑制热晕补偿不稳定性的发生。
Tradition Zernike modal wave front reconstruction method is improved in which a lot of surface integrations are avoided. Collimated thermally bloomed beam corrected by adaptive optics （AO） is numerically simulated. The results show that, because of model aliasing error, the Zernike reconstruction mode order is finite, which means that there exists a largest reconstruction mode order. When chosen reconstruction mode order is greater than the largest order, correction efficiency decreases quickly. And the largest order has no relation with thermal blooming strength. For a 69 elements AO system, which sub-aperture distribution is 8 × 8, the largest reconstruction mode order is 37. Compared with direct slope wave front reconstruction method, Zernike modal method can increase the adaptive optics system stability through choosing reconstruction mode when correction of thermal blooming distortes wave front.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2014年第9期1-7,共7页
Acta Optica Sinica
基金
激光与物理相互作用国家重点实验室基金项目(SKLLM1102)
关键词
自适应光学
泽尼克模式法
热晕效应
相位补偿不稳定性
数值模拟
adaptive optics
Zernike modal method
thermal blooming
phase compensation instability
numerical simulation
