中国物理B ›› 2012, Vol. 21 ›› Issue (9): 94201-094201.doi: 10.1088/1674-1056/21/9/094201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

A modified phase diversity wavefront sensor with a diffraction grating

罗群a b c, 黄林海b c, 顾乃庭b c, 饶长辉b c   

  1. a College of Opto-Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    b The Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;
    c The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
  • 收稿日期:2011-12-31 修回日期:2012-01-18 出版日期:2012-08-01 发布日期:2012-08-01

A modified phase diversity wavefront sensor with a diffraction grating

Luo Qun (罗群)a b c, Huang Lin-Hai (黄林海)b c, Gu Nai-Ting (顾乃庭)b c, Rao Chang-Hui (饶长辉)b c   

  1. a College of Opto-Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    b The Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;
    c The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
  • Received:2011-12-31 Revised:2012-01-18 Online:2012-08-01 Published:2012-08-01
  • Contact: Luo Qun E-mail:littlepuppet_luo@sina.com

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摘要： Phase diversity wavefront sensor is one of the useful tools to estimate the wavefront aberration, and it is often used as a wavefront sensor in adaptive optics system. However, the performance of the traditional phase diversity wavefront sensor is limited by the accuracy and dynamic ranges of the intensity distribution at focus and defocus positions of the CCD camera. In this paper, a modified phase diversity wavefront sensor based on a diffraction grating is proposed to improve the ability to measure the wavefront aberration with larger amplitude and higher spatial frequency. The basic principle and the optics construction of the proposed method are also described in detail. The noise propagation property of the proposed method is also analysed by using the numerical simulation method, and comparison between the diffraction grating phase diversity wavefront sensor and the traditional phase diversity wavefront sensor is also made. The simulation results show that the diffraction grating phase diversity wavefront sensor can obviously improve the ability to measure the wavefront aberration, especially the wavefront aberration with larger amplitude and higher spatial frequency.

关键词: phase diversity wavefront sensor, diffraction grating, aberration, signal-to-noise ratio

Abstract: Phase diversity wavefront sensor is one of the useful tools to estimate the wavefront aberration, and it is often used as a wavefront sensor in adaptive optics system. However, the performance of the traditional phase diversity wavefront sensor is limited by the accuracy and dynamic ranges of the intensity distribution at focus and defocus positions of the CCD camera. In this paper, a modified phase diversity wavefront sensor based on a diffraction grating is proposed to improve the ability to measure the wavefront aberration with larger amplitude and higher spatial frequency. The basic principle and the optics construction of the proposed method are also described in detail. The noise propagation property of the proposed method is also analysed by using the numerical simulation method, and comparison between the diffraction grating phase diversity wavefront sensor and the traditional phase diversity wavefront sensor is also made. The simulation results show that the diffraction grating phase diversity wavefront sensor can obviously improve the ability to measure the wavefront aberration, especially the wavefront aberration with larger amplitude and higher spatial frequency.

Key words: phase diversity wavefront sensor, diffraction grating, aberration, signal-to-noise ratio

中图分类号:  (Aberrations)

  • 42.15.Fr
42.25.Fx (Diffraction and scattering) 42.30.Rx (Phase retrieval) 42.40.Pa (Volume holograms)