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Northridge S. P.; Tasker M. L.; Webb A.; Williams J. M. 《ICES Journal of Marine Science》1995,52(6):1005-1012
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Bing Dong De-Qing Ren Xi Zhang Physics & Astronomy Department California State University Northridge CA - USA National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology Chinese Academy of Sciences Nanjing China 《中国天文和天体物理学报》2011,(8)
An adaptive optics(AO) system based on a stochastic parallel gradient descent(SPGD) algorithm is proposed to reduce the speckle noises in the optical system of a stellar coronagraph in order to further improve the contrast. The principle of the SPGD algorithm is described briey and a metric suitable for point source imaging optimization is given. The feasibility and good performance of the SPGD algorithm is demonstrated by an experimental system featured with a 140-actuator deformable mirror and a Hartmann-... 相似文献
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