摘要
夏克—哈特曼（S－H）传感器的探测误差是自适应光学系统的一个主要误差源。本文主要分析了S-H传感器的系统误差和随机误差，其误差源包括：CCD相机的读出噪声和背景电平，探测的像素数以及光子噪声。通过在计算哈特曼传感器子光斑质心时设定一个阈值可以大大提高传感器的探测精度。本文同时列举了实验数据和理论分析结果。
The detecting error of Shack-Hartmann (S-H) sensor is one of the main error sourcesin adaptive optical systems. In this paper the main sources of S-H sensor for both of thesystematic error and random noise are analyzed- These factors are readout noise andbackground level of CCD camera, number of detecting pixels, and photon shot noise.Setting a threshold level in processing centroid of Hartmann spots is benefit for improvingdetecting accuracy. The theoretical analysis and experimental results are presented in thispaper.
出处
《量子电子学报》
CAS
CSCD
1998年第2期218-227,共10页
Chinese Journal of Quantum Electronics
基金
国家高技术发展计划激光领域资助
关键词
自适应光学
波前传感器
误差分析
adaptive optics, warefront sensor, error analysis
