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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
Source PublicationResearch in Astronomy and Astrophysics
Volume15Issue:5Pages:764-772
Abstract
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.
KeywordDetectors-methods Image Processing
Subject Area天文技术与方法
DOI10.1088/1674–4527/15/5/013
Language英语
Funding OrganizationNational Natural Science Foundation of China
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Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1178
Collection中国科学院南京天文光学技术研究所_期刊论文
望远镜新技术研究室_期刊论文
Affiliation1.Nanjing Institute of Astronomical Optics & Technology
2.Key Laboratory of Astronomical Optics & Technology,Chinese Academy of Sciences
3.University of Chinese Academy of Sciences
Recommended Citation
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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