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Proceedings Paper

Speckle effect in a down-looking synthetic aperture imaging ladar
Author(s): Qian Xu; Yu Zhou; Jianfeng Sun; Zhiyong Lu; Zhiwei Sun; Liren Liu
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Paper 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.

Paper Details

Date Published: 18 September 2014
PDF: 6 pages
Proc. SPIE 9227, Unconventional Imaging and Wavefront Sensing 2014, 92270E (18 September 2014); doi: 10.1117/12.2060471
Show Author Affiliations
Qian Xu, Shanghai Institute of Optics and Fine Mechanics (China)
Yu Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Zhiyong Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Zhiwei Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9227:
Unconventional Imaging and Wavefront Sensing 2014
Jean J. Dolne; Thomas J. Karr; Victor L. Gamiz, Editor(s)

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