摘要
利用地基大的光学望远镜获得衍射极限成像是许多天文观测的重要目的,受大气扰动限制的分辨率可以通过在望远镜瞳面添加非冗余孔径掩模、采用闭合相位技术来突破。介绍了非冗余孔径掩模技术的发展、原理以及应用;建立了将此技术应用于双星探测的数学模型,并进行了计算机模拟及实验研究。研究结果表明,通过对非冗余孔径掩模获得的干涉图的处理,获得闭合相位,以此对双星模型进行拟合,能够获得双星的对比度与角间距。
It is one of the main aims for the most astronomical observations to obtain the diffraction-limited images by the large ground-borne optical telescope. The limited resolution induced by the atmospheric fluctuation can be overcome by the addition of non-redundant aperture masks on the telescope pupils and the closure phase technique. The progress, principle and applications of non-redundant aperture masking technique are reviewed, and the mathematical model for the application of this technique into the binary-star detection is established. The computer simulation and the corresponding experimental investigation are conducted. The research results show that one can obtain the closure phase by processing the interferogram obtained from the non-redundant aperture masking and thus the binary-star contrast ratio and angular separation can be obtained by fitting algorithms.
作者
王彦强
吴桢
Wang Yanqiang;Wu Zhen(National Astronomical Observatories/Nanjing Institute of Astronomical Optics ＆ Technology,Chinese Academy of Sciences,Nanjing,Jiangsu 210042,China;Key Laboratory of Astronomical Optics ＆ Technology,Chinese Academy of Sciences,Nanjing,Jiangsu 210042,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第11期224-232,共9页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11473047
11190011)
关键词
成像系统
光干涉
双星
非冗余孔径掩模
闭合相位
imaging systems
optical interference
binary stars
non-redundant aperture masking
closure phase
