非对称光斑照明合成孔径激光雷达宽测绘带成像研究

  本文关键词：非对称光斑照明合成孔径激光雷达宽测绘带成像研究，由笔耕文化传播整理发布。

摘要

合成孔径激光雷达（SAL）能实现远距离目标的高分辨成像，但是，其测绘带宽一般很小，不利于其在对地观测中的应用。针对这一问题，给出了宽测绘带SAL 实际成像范围的建议，具体研究了采用方位向短、距离向长的非对称光斑照明实现宽测绘带SAL 的成像处理问题。采用波动光学衍射理论，给出了这种宽测绘带SAL 的详细成像理论描述和数学仿真成像演示。结果表明，由于光学的短波长特性，，非对称光斑照明的宽测绘带SAL 也近似遵循基本SAL图像形成方法：傅里叶变换实现距离压缩，匹配滤波实现方位图像聚焦。

关键词

Abstract

Synthetic aperture ladar (SAL) can achieve long distance objects high resolutions imaging. However, the mapping bandwidth is generally small, which probably limits its applications in land surveillance. In order to solve the problem, practical imaging range of a wide swath SAL is suggested and a wide swath SAL using non-symmetric beam-pattern illumination with short azimuth size and long range size is investigated in detail. By wave optics diffraction theory, detailed theoretical descriptions of the image formation theory on the wide swath SAL as well as the mathematical simulations are given. The results show that due to the characteristic of short optical wavelength, the conventional image formation theory used in SAL data processing is approximately applied in wide swath SAL using non- symmetric beam- pattern illumination, that is, range compression by Fourier transformation and azimuth image focusing by matched filtering.

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补充资料

中图分类号：TN958

DOI：10.3788/aos201535.0328003

所属栏目：遥感与传感器

基金项目：国家自然科学基金（61178071）

收稿日期：2014-09-24

修改稿日期：2014-11-12

网络出版日期：--

作者单位    点击查看

吴谨：中国科学院电子学研究所, 北京 100190
赵志龙：中国科学院电子学研究所, 北京 100190中国科学院大学, 北京 100049
段洪成：中国科学院电子学研究所, 北京 100190中国科学院大学, 北京 100049
吴曙东：中国科学院电子学研究所, 北京 100190中国科学院大学, 北京 100049
黄文武：中国科学院电子学研究所, 北京 100190

联系人作者：吴谨(jwu909@263.net)

备注：吴谨（1965—），男，博士，研究员，主要从事脉冲气体激光器及激光雷达等方面的研究。

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引用该论文

Wu Jin,Zhao Zhilong,Duan Hongcheng,Wu Shudong,Huang Wenwu. Investigation on Image Formation of Wide Swath Synthetic Aperture Ladar Using Non-Symmetric Beam-Pattern Illumination[J]. Acta Optica Sinica, 2015, 35(3): 0328003

吴谨,赵志龙,段洪成,吴曙东,黄文武. 非对称光斑照明合成孔径激光雷达宽测绘带成像研究[J]. 光学学报, 2015, 35(3): 0328003

  本文关键词：非对称光斑照明合成孔径激光雷达宽测绘带成像研究，由笔耕文化传播整理发布。