High precision Zernike modal gray map reconstruction for liquid crystal corrector

doi:10.1088/1674-1056/19/6/064214

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 64214-064214.doi: 10.1088/1674-1056/19/6/064214

High precision Zernike modal gray map reconstruction for liquid crystal corrector

刘超¹, 穆全全¹, 胡立发², 曹召良², 宣丽²

(1)State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; (2)State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

收稿日期:2009-10-21 出版日期:2010-06-15 发布日期:2010-06-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grants Nos.~60736042, 60578035 and 50703039) and Science and Technology Cooperation Project between Chinese Academy of Sciences and Jilin Province (Grant No.~2008SYHZ0005).

High precision Zernike modal gray map reconstruction for liquid crystal corrector

Liu Chao(刘超)^a)b)†, Mu Quan-Quan(穆全全)^a)b), Hu Li-Fa(胡立发)^a), Cao Zhao-Liang(曹召良)^a), and Xuan Li(宣丽)^a)

^a State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; ^b Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

Received:2009-10-21 Online:2010-06-15 Published:2010-06-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grants Nos.~60736042, 60578035 and 50703039) and Science and Technology Cooperation Project between Chinese Academy of Sciences and Jilin Province (Grant No.~2008SYHZ0005).

摘要/Abstract

摘要： This paper proposes a new Zernike modal gray map reconstruction algorithm used in the nematic liquid crystal adaptive optics system. Firstly, the new modal algorithm is described. Secondly, a single loop correction experiment was conducted, and it showed that the modal method has a higher precision in gray map reconstruction than the widely used slope method. Finally, the contrast close-loop correction experiment was conducted to correct static aberration in the laboratory. The experimental results showed that the average peak to valley (PV) and root mean square (RMS) of the wavefront corrected by mode method were reduced from 2.501\lambda (\lambda =633~nm) and 0.610\lambda to 0.0334\lambda and 0.00845\lambda , respectively. The corrected PV and RMS were much smaller than those of 0.173\lambda and 0.048\lambda by slope method. The Strehl ratio and modulation transfer function of the system corrected by mode method were much closer to diffraction limit than with slope method. These results indicate that the mode method can take good advantage of the large number of pixels of the liquid crystal corrector to realize high correction precision.

Abstract: This paper proposes a new Zernike modal gray map reconstruction algorithm used in the nematic liquid crystal adaptive optics system. Firstly, the new modal algorithm is described. Secondly, a single loop correction experiment was conducted, and it showed that the modal method has a higher precision in gray map reconstruction than the widely used slope method. Finally, the contrast close-loop correction experiment was conducted to correct static aberration in the laboratory. The experimental results showed that the average peak to valley (PV) and root mean square (RMS) of the wavefront corrected by mode method were reduced from 2.501$\lambda$ ($\lambda =633~nm$) and 0.610$\lambda$ to 0.0334$\lambda$ and 0.00845$\lambda$, respectively. The corrected PV and RMS were much smaller than those of 0.173$\lambda$ and 0.048$\lambda$ by slope method. The Strehl ratio and modulation transfer function of the system corrected by mode method were much closer to diffraction limit than with slope method. These results indicate that the mode method can take good advantage of the large number of pixels of the liquid crystal corrector to realize high correction precision.

Key words: liquid crystal device, adaptive optics, modal gray map reconstruction

中图分类号: (Display devices, liquid-crystal devices)

42.79.Kr

42.30.Wb (Image reconstruction; tomography) 42.30.Lr (Modulation and optical transfer functions) 42.15.Fr (Aberrations)

刘超, 穆全全, 胡立发, 曹召良, 宣丽. High precision Zernike modal gray map reconstruction for liquid crystal corrector[J]. 中国物理B, 2010, 19(6): 64214-064214.

Liu Chao(刘超), Mu Quan-Quan(穆全全), Hu Li-Fa(胡立发), Cao Zhao-Liang(曹召良), and Xuan Li(宣丽). High precision Zernike modal gray map reconstruction for liquid crystal corrector[J]. Chin. Phys. B, 2010, 19(6): 64214-064214.

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High precision Zernike modal gray map reconstruction for liquid crystal corrector

High precision Zernike modal gray map reconstruction for liquid crystal corrector

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