| 基于遗传算法的相位差法波前检测piston误差 |
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| 引用本文： | 曹芳,赵继勇,吴桢.基于遗传算法的相位差法波前检测piston误差[J].天文研究与技术,2011(4). |
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| 作者姓名： | 曹芳 赵继勇 吴桢 |
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| 作者单位： | 南京理工大学紫金学院电光系;解放军理工大学通信工程学院;中国科学院国家天文台南京天文光学技术研究所; |
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| 摘 要： | 光学综合孔径望远镜常常因为子望远镜间的失调大于1λ产生相位差,影响望远镜的分辨能力。基于相位差法的检测技术,可以检测出子望远镜间的微小失调误差。提出了相位差波前检测方法与遗传算法相结合,设计了一个相位差波前传感器,进行综合孔径望远系统的piston误差检测。在计算机模拟成像系统的基础上,仿真结果证明,基于遗传算法的相位差波前检测方法可以较准确地恢复波前相位,检测piston误差。
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| 关 键 词： | 波前检测 综合孔径望远镜 相位差法 piston误差 遗传算法 |
Detection of Piston Errors in Wavefront Sensing Using a Genetic-Algorithm Based Phase Diversity Method |
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| Cao Fang,Zhao Jiyong,Wu Zhen.Detection of Piston Errors in Wavefront Sensing Using a Genetic-Algorithm Based Phase Diversity Method[J].Astronomical Research & Technology,2011(4). |
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| Authors: | Cao Fang Zhao Jiyong Wu Zhen |
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| Institution: | Cao Fang1,Zhao Jiyong2,Wu Zhen3(1.Zijin College,Nanjing University of Science & Technology,NanJing 210046,China,2.Institute of Communication Engineering,PLA University of Science and Technology,Nanjing 210007,3.National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology,Chinese Academy of Sciences,Nanjing 210042,China) |
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| Abstract: | The resolution of an optical aperture synthesis telescope can be degraded by phase errors unless its subapertures are aligned to within a small fraction of the wavelength of incoming light.The phase diversity method can be used to estimate small misalignment errors of subapertures.This paper proposes a design of wavefront sensor of phase diversities by incorporating a GA(Genetic Algorithm).Such a design is suitable for detecting piston errors of an aperture synthesis telescope.Computer simulations are used ... |
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| Keywords: | Wavefront sensing Optical aperture synthesis telescope Phase diversity Piston error GA |
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