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| 扩展目标夏克-哈特曼波前传感器的频域迭代算法研究 | |
| 引用本文： | 曾仁昌,刘晓华,胡新奇,杨鹏.扩展目标夏克-哈特曼波前传感器的频域迭代算法研究[J].光学学报,2012,32(7):701006-40. |
| 作者姓名： | 曾仁昌 刘晓华 胡新奇 杨鹏 |
| 作者单位： | 曾仁昌:北京理工大学光电学院, 北京 100081 刘晓华:北京理工大学光电学院, 北京 100081 胡新奇:北京理工大学光电学院, 北京 100081 杨鹏:北京理工大学光电学院, 北京 100081 |
| 基金项目： | 国家973计划（2009CB724006）资助课题。 |
| 摘 要： | 扩展目标夏克-哈特曼波前传感器(SH-WFS)子图像之间偏移量的计算是影响波前传感精度的关键,通常采用相关算法来实现,并通过抛物线插值达到亚像元精度。子图像间的相对偏移量计算也可采用频域相移量估算的方法进行计算,频域算法还可通过迭代进一步提高算法精度。对频域迭代算法进行了理论分析、仿真和实验研究,结果表明,频域迭代算法在信噪比高于4…1时,具有比抛物线插值法更高的计算精度;在信噪比较低时,与抛物线插值法精度相近。 |
| 关 键 词： | 图像处理 自适应光学 夏克-哈特曼波前传感 扩展目标 频域迭代算法 |
| 收稿时间： | 2011/10/27 |
Frequency-Domain Iterative Algorithm for Extended Scene Shack-Hartmann Wavefront Sensing |
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| Zeng Renchang Liu Xiaohua Hu Xinqi Yang Peng.Frequency-Domain Iterative Algorithm for Extended Scene Shack-Hartmann Wavefront Sensing[J].Acta Optica Sinica,2012,32(7):701006-40. | |
| Authors: | Zeng Renchang Liu Xiaohua Hu Xinqi Yang Peng |
| Institution: | Zeng Renchang Liu Xiaohua Hu Xinqi Yang Peng(School of Optoelectronics,Beijing Institute of Technology,Beijing 100081,China) |
| Abstract: | The estimation of the shifts between sub-images obtained in extended scene Shack-Hartmann wavefront sensing (SH-WFS) are the keys for calculating wavefront errors. The estimation can be got by parabolic interpolation algorithm and the accuracy can reach sub-pixel. The estimation can also be acquired by frequency-domain phase-shift algorithm and the accuracy can increase using frequency-domain iterative algorithm. Based on the later algorithm, the theoretical analysis, simulation and experiment are researched. The results show that the parabolic interpolation algorithm and frequency-domain iterative algorithm get close results in low signal-noise-ratio (SNR), but the later one performs better while SNR is higher than 41. |
| Keywords: | image processing adaptive optics Shack-Hartmann wavefront sensing extended scene frequency-domain iterative algorithm |
| 本文献已被 CNKI 等数据库收录！ | |