多光束激光相干成像孔径偏差对成像质量影响

张羽; 罗秀娟; 刘辉; 陈明徕; 程志远; 兰富洋

doi:doi:10.5768/jao201940.0302001

应用光学, 2019, 40 (3): 411, 网络出版: 2019-06-10

多光束激光相干成像孔径偏差对成像质量影响

Research on distribution of aperture position error in multi-beam coherent imaging and its impact on image quality

论文大纲

张羽罗秀娟刘辉陈明徕程志远兰富洋

作者单位

中国科学院西安光学精密机械研究所，陕西西安 710119

相干场成像傅里叶望远技术瞄准精度孔径位置成像质量 coherent field imaging Fourier telescopy aiming accuracy aperture position imaging quality

摘要

多光束激光相干场成像技术突破传统概念，采用微小频移的光束组两两干涉提取目标的傅里叶分量，通过目标频谱傅里叶逆变换获得目标高分辨率图像。该技术仍处于实验室原理验证向实体阵列过渡的研究阶段。在这一过程中多种影响因素对成像质量产生着影响。其中发射阵列的孔径位置误差分布规律以及控制范围一直缺乏较为系统的理论支撑。从傅里叶望远镜发射阵列的光场传输特性入手，分析了在基线不同位置引入孔径误差时对成像质量的影响。并分析出孔径位置精度的要求与分布规律，同时针对这一分布规律提出了孔径位置的相对误差精度，计算机仿真分析得出相对误差精度应控制在5%以内不影响成像质量。该研究为傅里叶望远镜发射阵列的设计与装调提供了理论依据，为傅里叶望远技术的工程化实现奠定一定的理论基础。

Abstract

As the research of coherent imaging (Fourier telescopy) in the procedure from laboratory experiments to the real system, there are many factors that may impact on the realization. However, among the factors and analysis, there has not been a theoretical support for calibrating the aperture position error distribution and the error range. In this article, based on the optical transportation theory, the aperture position error distribution and its impact on image quality were analyzed. The paper also proposed the error range and carried out the experimental setups. The results demonstrate that the relative position error should be controlled less than 5%. To sum up, this article provide a theoretical method to analyze the design and the configuration of the real Fourier telescopy.

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张羽, 罗秀娟, 刘辉, 陈明徕, 程志远, 兰富洋. 多光束激光相干成像孔径偏差对成像质量影响[J]. 应用光学, 2019, 40(3): 411. ZHANG Yu, LUO Xiujuan, LIU Hui, CHEN Minglai, CHENG Zhiyuan, LAN Fuyang. Research on distribution of aperture position error in multi-beam coherent imaging and its impact on image quality[J]. Journal of Applied Optics, 2019, 40(3): 411.

多光束激光相干成像孔径偏差对成像质量影响

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