激光与光电子学进展, 2016, 53 (8): 080103, 网络出版: 2016-08-11
光栅型波前曲率传感自适应光学的基本参数分析 下载: 602次
Analysis of Basic Parameters of Adaptive Optics Based on Grating Wavefront Curvature Sensor
自适应光学 波前曲率传感器 波前复原 拉普拉斯算子本征函数 adaptive optics wavefront curvature sensors wavefront reconstruction Laplacian eigenfunctions
摘要
针对光栅型波前曲率传感自适应光学中的拉普拉斯算子本征函数实时波前复原方法,分析了光电探测器上的光斑大小和位置偏差,以及本征模式数量对波前复原精度的影响。结果表明:截取的光斑区域大小对波前复原精度有较大的影响,可采用环围能量比进行确定;由于存在其他级次的衍射光,光斑区域位置偏差不仅会引起波前倾斜误差,还会引起其他波前误差;当采用的模式过多时,由有限的分辨率引起的模式耦合会显著影响波前复原精度,可利用模式间的相关系数来估计最佳模式数。
Abstract
For the real-time wavefront reconstruction method with the eigenfunctions of Laplacian in adaptive optics based on grating wavefront curvature sensor, three basic parameters including the selected light spot size and the position deviation on photoelectric detector, and the influence of the number of eigenfunctions modes on the precision of wavefront reconstruction are analyzed. The results show that the selected light spot size on the photoelectric detector has an obvious effect on the wavefront reconstruction accuracy, which can be obtained by the ring energy ratio. Because of other diffraction orders light on photoelectric detector, the position deviations of the light spot induce not only the wavefront tilt error but also other wavefront errors. The mode coupling due to the limited resolution can significantly affect the accuracy of the wavefront reconstruction when using too many modes, and the optimal mode number can be estimated via the correlation coefficient between modes.
张湧涛, 李小阳, 陈波, 杨旭, 孙天齐. 光栅型波前曲率传感自适应光学的基本参数分析[J]. 激光与光电子学进展, 2016, 53(8): 080103. Zhang Yongtao, Li Xiaoyang, Chen Bo, Yang Xu, Sun Tianqi. Analysis of Basic Parameters of Adaptive Optics Based on Grating Wavefront Curvature Sensor[J]. Laser & Optoelectronics Progress, 2016, 53(8): 080103.