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差分合成孔径激光雷达高分辨率成像实验

High resolution imaging experiment on differential synthetic aperture ladar

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摘要

利用1 550 nm波长的可调谐光纤激光器, 建立了DSAL(Differential synthetic aperture ladar)高分辨率成像演示实验装置。在1.85 m的目标距离上, 开展了合作目标的DSAL成像实验。利用基本的DSAL成像理论, 重构了目标回波的相位史数据, 实现了高分辨率合成孔径成像。详细给出了不同方位运动条件下获得的DSAL图像。实验结果表明: 利用经过DSAL技术重建后的目标回波相位史数据, 能够形成聚焦良好的高分辨率DSAL图像。这显示了DSAL技术对共模相位误差的稳健消除能力。此外, 不同方位运动条件下的DSAL成像结果表明, 在超过规定方位运动速度30%的范围内, 均可观察到良好聚焦或至少可接受的DSAL图像, 表明DSAL系统对方位运动速度变化有一定范围的适应能力。

Abstract

Using a tunable fiber laser of 1 550 nm wavelength, a high resolution imaging differential synthetic aperture ladar(DSAL) was set up in the laboratory. DSAL imaging experiments were carried out using a cooperative target at distance of 1.85 m. The phase history data (PHD) of the target returns were reconstructed and high resolution synthetic aperture images were generated by straightforwardly following standard DSAL image formation theory. High resolution DSAL images at various azimuth moving conditions were given in detail. Experimental data show that using the reconstructed PHD by DSAL technique, much better focused images can be produced, which demonstrates that the DSAL technique can robustly remove the common phase errors in the PHD. Moreover, DSAL images with various azimuth moving conditions show that even if the azimuth speed is 30% longer or shorter than its ideal value, the DSAL images are all well or at least acceptably focused, which means that a DSAL system is possibly well adaptive to the variation of its azimuth speed.

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中图分类号:TN958

DOI:10.3788/irla201847.1230003

所属栏目:激光雷达技术

基金项目:国家自然科学基金(61178071)

收稿日期:2018-07-05

修改稿日期:2018-08-03

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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:北京卫星信息工程研究所 天地一体化信息技术国家重点实验室, 北京 100086
白 涛:中国科学院大学, 北京 100049
李明磊:中国科学院大学, 北京 100049
李丹阳:中国科学院大学, 北京 100049
万 磊:中国科学院大学, 北京 100049
唐永新:中国科学院电子学研究所, 北京 100190
刁伟伦:中国科学院电子学研究所, 北京 100190

联系人作者:吴谨(jwu@mail.ie.ac.cn)

备注:吴谨(1965-), 男, 研究员, 博士, 主要从事激光雷达及脉冲气体激光器技术研究。

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引用该论文

Wu Jin,Zhao Zhilong,Bai Tao,Li Minglei,Li Danyang,Wan Lei,Tang Yongxin,Diao Weilun. High resolution imaging experiment on differential synthetic aperture ladar[J]. Infrared and Laser Engineering, 2018, 47(12): 1230003

吴 谨,赵志龙,白 涛,李明磊,李丹阳,万 磊,唐永新,刁伟伦. 差分合成孔径激光雷达高分辨率成像实验[J]. 红外与激光工程, 2018, 47(12): 1230003

被引情况

【1】尹红飞,郭亮,杨利超,孙光才,邢孟道,曾晓东. 机载合成孔径激光雷达全孔径成像算法. 光学学报, 2019, 39(9): 928002--1

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