2 January 2018 Application of dot-matrix illumination of liquid crystal phase space light modulator in 3D imaging of APD array
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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.
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Shuai Wang, Shuai Wang, Huayan Sun, Huayan Sun, Huichao Guo, Huichao Guo, } "Application of dot-matrix illumination of liquid crystal phase space light modulator in 3D imaging of APD array", Proc. SPIE 10456, Nanophotonics Australasia 2017, 104564C (2 January 2018); doi: 10.1117/12.2283338; https://doi.org/10.1117/12.2283338
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