Phase detection experiment for the down-looking synthetic aperture imaging ladar with electro-optic modulation

Zhiyong Lu; Jianfeng Sun; Ya'nan Zhi; Ning Zhang; Liren Liu

doi:10.1117/12.2059886

18 September 2014 Phase detection experiment for the down-looking synthetic aperture imaging ladar with electro-optic modulation

Zhiyong Lu, Jianfeng Sun, Ya'nan Zhi, Ning Zhang, Liren Liu

Author Affiliations +

Proceedings Volume 9227, Unconventional Imaging and Wavefront Sensing 2014; 92270C (2014) https://doi.org/10.1117/12.2059886
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

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.

Citation Download Citation

Zhiyong Lu, Jianfeng Sun, Ya'nan Zhi, Ning Zhang, and Liren Liu "Phase detection experiment for the down-looking synthetic aperture imaging ladar with electro-optic modulation", Proc. SPIE 9227, Unconventional Imaging and Wavefront Sensing 2014, 92270C (18 September 2014); https://doi.org/10.1117/12.2059886

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