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Proceedings Paper

Design and simulation of imaging algorithm for Fresnel telescopy imaging system
Author(s): Xiao-yu Lv; Li-ren Liu; Ai-min Yan; Jian-feng Sun; En-wen Dai; Bing Li
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Paper Abstract

Fresnel telescopy (short for Fresnel telescopy full-aperture synthesized imaging ladar) is a new high resolution active laser imaging technique. This technique is a variant of Fourier telescopy and optical scanning holography, which uses Fresnel zone plates to scan target. Compare with synthetic aperture imaging ladar(SAIL), Fresnel telescopy avoids problem of time synchronization and space synchronization, which decreasing technical difficulty. In one-dimensional (1D) scanning operational mode for moving target, after time-to-space transformation, spatial distribution of sampling data is non-uniform because of the relative motion between target and scanning beam. However, as we use fast Fourier transform (FFT) in the following imaging algorithm of matched filtering, distribution of data should be regular and uniform. We use resampling interpolation to transform the data into two-dimensional (2D) uniform distribution, and accuracy of resampling interpolation process mainly affects the reconstruction results. Imaging algorithms with different resampling interpolation algorithms have been analysis and computer simulation are also given. We get good reconstruction results of the target, which proves that the designed imaging algorithm for Fresnel telescopy imaging system is effective. This work is found to have substantial practical value and offers significant benefit for high resolution imaging system of Fresnel telescopy laser imaging ladar.

Paper Details

Date Published: 23 August 2011
PDF: 9 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81924I (23 August 2011); doi: 10.1117/12.902741
Show Author Affiliations
Xiao-yu Lv, Shanghai Institute of Optics and Fine Mechanics (China)
Li-ren Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Ai-min Yan, Shanghai Institute of Optics and Fine Mechanics (China)
Jian-feng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
En-wen Dai, Shanghai Institute of Optics and Fine Mechanics (China)
Bing Li, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging
Farzin Amzajerdian; Weibiao Chen; Chunqing Gao; Tianyu Xie, Editor(s)

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