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28 November 2007 Imaging analysis of optical sparse aperture systems with multiple-array configuration designs
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Based on the traditional array configuration, a novel array configuration design, named the multiple-array sparse aperture system, is proposed, and three kinds of configuration models, including the multiple-annulus, the multiple-Golay6 and the multiple-Tri-arm, have been investigated. The imaging performances of the different multiple-array configurations are compared according to their modulation transfer functions (MTFs). Then the optical experiments with the multiple-array configurations have been fulfilled with the specific system parameters. The MTFs and the direct imaging results of the multiple-array sparse aperture systems are obtained, and then the image restoration of the direct output is performed by measuring the corresponding point spread functions (PSFs) and by using the Weiner filter. The experimental results show that the characteristic of the MTFs of the multiple-array configurations and the corresponding imaging performance are in accordance with the numerical simulation. And it is demonstrated that the multiple Tri-arm array configuration among the three kinds of multiple-array configuration models can produce higher resolution and larger correlation coefficient after the restoration. The results illustrate the possible way to construct very larger array configuration of optical sparse aperture systems by combining multiple copies of the simple array.
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Juan Zhao, Dayong Wang, Ji Han, Zhuqing Jiang, Yuhong Wan D.D.S., Hongfeng Guo, and Shiquan Tao "Imaging analysis of optical sparse aperture systems with multiple-array configuration designs", Proc. SPIE 6834, Optical Design and Testing III, 68340D (28 November 2007);

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