| Original Articles |
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High Closed Loop Correction Accuracy with a Liquid Crystal Wavefront Corrector |
| CAO Zhao-Liang1,2;MU Quan-Quan1,2;HU Li-Fa1;LIU Yong-Gang1;PENG Zeng-Hui1;XUAN Li1 |
| 1State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 1300332Graduate School of the Chinese Academy of Sciences, Beijing 100039 |
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| Cite this article: |
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CAO Zhao-Liang, MU Quan-Quan, HU Li-Fa et al 2008 Chin. Phys. Lett. 25 989-992 |
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Abstract We investigate the accurate control of a liquid crystal wavefront corrector. First, the Gamma correction technique is adopted to amend the nonlinear phase modulation. Then, the control method and wavefront reconstruction are considered. Lastly, a closed loop correction experiment is carried out and a high correction accuracy is obtained with peak to valley (PV) of 0.08λ (λ=632.8nm), the wavefront phase rms 0.015λ, as well as the Strehl ratio of 0.99. The diffraction-limited resolution is achieved.
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| Keywords:
42.79.Kr
95.75.Qr
42.68.Wt
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Received: 01 September 2007
Published: 27 February 2008
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| PACS: |
42.79.Kr
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(Display devices, liquid-crystal devices)
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95.75.Qr
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(Adaptive and segmented optics)
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42.68.Wt
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(Remote sensing; LIDAR and adaptive systems)
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