Correction and simulation of the intensity compensation algorithm used in curvature wavefront sensing | |
Zhi-Xu Wu1,2,3; Hua Bai1,2; Xiang-Qun Cui1,2 | |
2015-05 | |
发表期刊 | Research in Astronomy and Astrophysics |
卷号 | 15期号:5页码:764-772 |
摘要 |
The wavefront measuring range and recovery precision of a curvature sensor can be improved by an intensity compensation algorithm. However, in a focal system with a fast f-number, especially a telescope with a large field of view, the accuracy of this algorithm cannot meet the requirements. A theoretical analysis of the corrected intensity compensation algorithm in a focal system with a fast f-number is first introduced and afterwards the mathematical equations used in this algorithm are expressed.
The corrected result is then verified through simulation. The method used by such a simulation can be described as follows. First, the curvature signal from a focal system with a fast f-number is simulated by Monte Carlo ray tracing; then the wavefront result is calculated by the inner loop of the FFT wavefront recovery algorithm and the outer loop of the intensity compensation algorithm. Upon comparing the intensity compensation algorithm of an ideal system with the corrected intensity compensation algorithm, we reveal that the recovered precision of the curvature sensor can be greatly improved by the corrected intensity compensation algorithm. |
关键词 | Detectors-methods Image Processing |
学科领域 | 天文技术与方法 |
DOI | 10.1088/1674–4527/15/5/013 |
语种 | 英语 |
项目资助者 | National Natural Science Foundation of China |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.niaot.ac.cn/handle/114a32/1178 |
专题 | 期刊论文 |
作者单位 | 1.Nanjing Institute of Astronomical Optics & Technology 2.Key Laboratory of Astronomical Optics & Technology,Chinese Academy of Sciences 3.University of Chinese Academy of Sciences |
推荐引用方式 GB/T 7714 | Zhi-Xu Wu,Hua Bai,Xiang-Qun Cui. Correction and simulation of the intensity compensation algorithm used in curvature wavefront sensing[J]. Research in Astronomy and Astrophysics,2015,15(5):764-772. |
APA | Zhi-Xu Wu,Hua Bai,&Xiang-Qun Cui.(2015).Correction and simulation of the intensity compensation algorithm used in curvature wavefront sensing.Research in Astronomy and Astrophysics,15(5),764-772. |
MLA | Zhi-Xu Wu,et al."Correction and simulation of the intensity compensation algorithm used in curvature wavefront sensing".Research in Astronomy and Astrophysics 15.5(2015):764-772. |
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