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Proceedings Paper

Phase detection experiment for the down-looking synthetic aperture imaging ladar with electro-optic modulation
Author(s): Zhiyong Lu; Jianfeng Sun; Ya'nan Zhi; Ning Zhang; Liren Liu
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Paper Abstract

The down-looking synthetic aperture imaging ladar (SAIL) with electro-optic modulation was proposed. The measurement uses electrically controlled scanner to produce beams with spatial parabolic phase difference, which consists of electro-optic crystal and cylindrical lens. Due to the high modulation rate without mechanical scanning, this technique has a great potential for applications in extensive synthetic aperture imaging ladar fields. The phase mapping of electrically controlled scanner under the different applied voltage is achieved and measured by the polarized digital holographic interferometry. The phase mappings of the scanner in the down-looking SAIL with the o-polarized light and e-polarized light are obtained. The linear phase distribution and the parabolic phase distribution are observed after applying the external electric field. The corresponding analyses and discussions are proposed to explain the phenomena.

Paper Details

Date Published: 18 September 2014
PDF: 9 pages
Proc. SPIE 9227, Unconventional Imaging and Wavefront Sensing 2014, 92270C (18 September 2014); doi: 10.1117/12.2059886
Show Author Affiliations
Zhiyong Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Ya'nan Zhi, Shanghai Institute of Optics and Fine Mechanics (China)
Ning Zhang, 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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