Speckle effect in a down-looking synthetic aperture imaging ladar

Qian Xu; Yu Zhou; Jianfeng Sun; Zhiyong Lu; Zhiwei Sun; Liren Liu

doi:10.1117/12.2060471

18 September 2014 Speckle effect in a down-looking synthetic aperture imaging ladar

Qian Xu, Yu Zhou, Jianfeng Sun, Zhiyong Lu, Zhiwei Sun, Liren Liu

Proceedings Volume 9227, Unconventional Imaging and Wavefront Sensing 2014; 92270E (2014) https://doi.org/10.1117/12.2060471
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

Down-looking synthetic aperture imaging ladar(SAIL) has overcome many difficulties in side-looking SAIL. However, it is inevitably impacted by the speckle effect. There is temporally varying speckle effect due to the angular deflecting of two coaxial polarization-orthogonal beams transmitted in the orthogonal direction of travel, and a spatial varying speckle effect in the travel direction. Under the coaxial heterodyne, phase variations caused by speckle effect are compensated, leaving the amplitude variations of speckle field. In this paper, the speckle effect in the down-looking SAIL is analyzed, expressions for two-dimensional data collection contained speckle effect are obtained and the two-dimensional image influenced by speckle effect is simulated.

Citation Download Citation

Qian Xu, Yu Zhou, Jianfeng Sun, Zhiyong Lu, Zhiwei Sun, and Liren Liu "Speckle effect in a down-looking synthetic aperture imaging ladar", Proc. SPIE 9227, Unconventional Imaging and Wavefront Sensing 2014, 92270E (18 September 2014); https://doi.org/10.1117/12.2060471

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