17 September 2013 Optical imaging process based on two-dimensional Fourier transform for synthetic aperture imaging ladar
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Abstract
The synthetic aperture imaging ladar (SAIL) systems typically generate large amounts of data difficult to compress with digital method. This paper presents an optical SAIL processor based on compensation of quadratic phase of echo in azimuth direction and two dimensional Fourier transform. The optical processor mainly consists of one phase-only liquid crystal spatial modulator(LCSLM) to load the phase data of target echo and one cylindrical lens to compensate the quadratic phase and one spherical lens to fulfill the task of two dimensional Fourier transform. We show the imaging processing result of practical target echo obtained by a synthetic aperture imaging ladar demonstrator. The optical processor is compact and lightweight and could provide inherent parallel and the speed-of-light computing capability, it has a promising application future especially in onboard and satellite borne SAIL systems.
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Zhiwei Sun, Zhiwei Sun, Ya'nan Zhi, Ya'nan Zhi, Liren Liu, Liren Liu, Jianfeng Sun, Jianfeng Sun, Yu Zhou, Yu Zhou, Peipei Hou, Peipei Hou, } "Optical imaging process based on two-dimensional Fourier transform for synthetic aperture imaging ladar", Proc. SPIE 8877, Unconventional Imaging and Wavefront Sensing 2013, 88770L (17 September 2013); doi: 10.1117/12.2022977; https://doi.org/10.1117/12.2022977
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