物理学报2011，Vol.60Issue(9)：185-192,8.
点源信标相关哈特曼-夏克波前传感器光斑偏移测量误差分析
Error analysis of correlating Shack-Hartmann wave-front sensor for a point source
陈林辉 1饶长辉2
作者信息
- 1. 中国科学院自适应光学重点实验室,成都610209
- 2. 中国科学院光电技术研究所,成都610209
- 折叠
摘要
Abstract
In Shack-Hartmann wavefront sensor（SH-WFS） based adaptive optics system, the centroiding algorithm is usually used to estimate the centroid of a point source spot. But the detecting accuracy of the centroiding algorithm is affected by many factors such as threshold selection, so that the centroid position of the spot cannot be evaluated accurataly under the condition of low signal-to-noise ratio（SNR） . Comparatively the correlating algorithm for Shack-Hartmann wave front-sensing is more robust because it need not reduce the thresholding. In this paper, based on the the principle of the correlating SH-WFS, the measurement error of the correlating SH-WFS is derived by building up the noise model of the correlating SH-WFS. The influences of spot size, photon noise, read out noise and background light noise on the measurement of the correlating SH-WFS are analyzed systematically. The numerically simulation results and the experimental results are consistent well with the theoretical analyses.关键词
相关哈特曼-夏克波前传感器/相关哈特曼算法/质心算法/测量误差Key words
correlating Shack-Hartmann wavefront sensor/correlation algorithm/centroiding algorithm/measuring error分类
信息技术与安全科学引用本文复制引用
陈林辉,饶长辉..点源信标相关哈特曼-夏克波前传感器光斑偏移测量误差分析[J].物理学报,2011,60(9):185-192,8.
