NIAOT OpenIR  > 中国科学院南京天文光学技术研究所  > 期刊论文
Phase retrieval using a modified Shack–Hartmann wavefront sensor with defocus
Changwei Li; Bangming Li; Sijiong Zhang
2014-01
Source PublicationAPPLIED OPTICS
Volume53Issue:4Pages:618-624
Other Abstract
This paper proposes a modified Shack–Hartmann wavefront sensor for phase retrieval. The sensor is revamped by placing a detector at a defocused plane before the focal plane of the lenslet array of the Shack–Hartmann sensor. The algorithm for phase retrieval is an optimization with initial Zernike coefficients calculated by the conventional phase reconstruction of the Shack–Hartmann sensor. Numerical simulations show that the proposed sensor permits sensitive, accurate phase retrieval. Furthermore, experiments tested the feasibility of phase retrieval using the proposed sensor. The surface irregularity for a flat mirror was measured by the proposed method and a Veeco interferometer, respectively. The irregularity for the mirror measured by the proposed method is in very good agreement with that measured using the Veeco interferometer.
KeywordPhase Retrieval Active Or Adaptive Optics
Subject Area天文技术与方法
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/806
Collection中国科学院南京天文光学技术研究所_期刊论文
中科院天文光学技术重点实验室_期刊论文
Recommended Citation
GB/T 7714
Changwei Li,Bangming Li,Sijiong Zhang. Phase retrieval using a modified Shack–Hartmann wavefront sensor with defocus[J]. APPLIED OPTICS,2014,53(4):618-624.
APA Changwei Li,Bangming Li,&Sijiong Zhang.(2014).Phase retrieval using a modified Shack–Hartmann wavefront sensor with defocus.APPLIED OPTICS,53(4),618-624.
MLA Changwei Li,et al."Phase retrieval using a modified Shack–Hartmann wavefront sensor with defocus".APPLIED OPTICS 53.4(2014):618-624.
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