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Proceedings Paper

Application of dot-matrix illumination of liquid crystal phase space light modulator in 3D imaging of APD array
Author(s): Shuai Wang; Huayan Sun; Huichao Guo
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Paper Abstract

Aiming at the problem of beam scanning in low-resolution APD array in three-dimensional imaging, a method of beam scanning with liquid crystal phase-space optical modulator is proposed to realize high-resolution imaging by low-resolution APD array. First, a liquid crystal phase spatial light modulator is used to generate a beam array and then a beam array is scanned. Since the sub-beam divergence angle in the beam array is smaller than the field angle of a single pixel in the APD array, the APD's pixels respond only to the three-dimensional information of the beam illumination position. Through the scanning of the beam array, a single pixel is used to collect the target three-dimensional information multiple times, thereby improving the resolution of the APD detector. Finally, MATLAB is used to simulate the algorithm in this paper by using two-dimensional scalar diffraction theory, which realizes the splitting and scanning with a resolution of 5 x 5. The feasibility is verified theoretically.

Paper Details

Date Published: 2 January 2018
PDF: 7 pages
Proc. SPIE 10456, Nanophotonics Australasia 2017, 104564C (2 January 2018); doi: 10.1117/12.2283338
Show Author Affiliations
Shuai Wang, The Academy of Equipment (China)
Huayan Sun, The Academy of Equipment (China)
Huichao Guo, The Academy of Equipment (China)

Published in SPIE Proceedings Vol. 10456:
Nanophotonics Australasia 2017
James W. M. Chon; Baohua Jia, Editor(s)

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