| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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The co-phasing detection method for sparse optical synthetic aperture systems |
| Liu Zheng(刘政)a)b)†, Wang Sheng-Qian(王胜千)a), and Rao Chang-Hui(饶长辉)a) |
a. Key Laboratory on Adaptive Optics, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;
b. College of Photon-Electron Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract Co-phasing between different sub-apertures is important for sparse optical synthetic aperture telescope systems to achieve high-resolution imaging. For co-phasing detection in such a system, a new aspect of the system's far-field interferometry is analysed and used to construct a novel method to detect piston errors. An optical setup is built to demonstrate the efficacy of this method. Experimental results show that the relative differences between measurements by this method and the criterion are less than 4%, and their residual detecting errors are about 0.01 λ for different piston errors, which makes the use of co-phasing detection within such a system promising.
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Received: 09 February 2012
Revised: 05 March 2012
Accepted manuscript online:
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PACS:
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95.55.Cs
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(Ground-based ultraviolet, optical and infrared telescopes)
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42.30.Va
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(Image forming and processing)
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42.15.Fr
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(Aberrations)
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| Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61008038). |
Corresponding Authors:
Liu Zheng
E-mail: liuzhengIOE@yeah.net
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Cite this article:
Liu Zheng(刘政), Wang Sheng-Qian(王胜千), and Rao Chang-Hui(饶长辉) The co-phasing detection method for sparse optical synthetic aperture systems 2012 Chin. Phys. B 21 069501
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