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提高夏克-哈特曼波前传感器光斑质心的定位精度

Positioning Accuracy Improvement of Spot Centroid for Shack-Hartmann Wavefront Sensor

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摘要

提出了一种提高夏克-哈特曼波前传感器光斑质心的定位精度算法, 分析了光斑质心的探测误差, 采用与光斑尺寸匹配的探测窗口及插值法提高了图像的分辨率, 并使用二阶矩算法计算了质心位置。采用该算法对含有噪声的光斑图进行图像处理与计算, 并给出了待测件的波前重构示意图。结果表明, 相对于传统算法, 该算法将质心的探测精度提高了约0.8倍。

Abstract

An algorithm to improve the positioning accuracy of spot centroid for Shack-Hartmann wavefront sensor is proposed. The detection errors of spot centroid are analyzed. The image resolution is improved by utilizing the detection window whose size is matched with that of spot and using the interpolation method. The centroid position is calculated by the two-order moment algorithm. The proposed algorithm is used to process and calculate the spot images with noise and the wavefront reconstruction diagram of the test component is also presented. The results show that, compared with the traditional algorithm, the proposed algorithm improves the detection accuracy of centroid by about 0.8 times.

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中图分类号:TH741

DOI:10.3788/lop54.081201

所属栏目:仪器,测量与计量

收稿日期:2016-12-08

修改稿日期:2017-03-21

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作者单位    点击查看

师亚萍:西安工业大学光电工程学院, 陕西 西安 710021
刘缠牢:西安工业大学光电工程学院, 陕西 西安 710021

联系人作者:师亚萍(564618778@qq.com)

备注:师亚萍(1990-), 女, 硕士研究生, 主要从事光学检测方面的研究。

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引用该论文

Shi Yaping,Liu Chanlao. Positioning Accuracy Improvement of Spot Centroid for Shack-Hartmann Wavefront Sensor[J]. Laser & Optoelectronics Progress, 2017, 54(8): 081201

师亚萍,刘缠牢. 提高夏克-哈特曼波前传感器光斑质心的定位精度[J]. 激光与光电子学进展, 2017, 54(8): 081201

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