• Chinese Optics Letters
  • Vol. 18, Issue 9, 093501 (2020)
Yang Yang, Xinyang Liu, Yan Wu, Ting Li, Fan Fan, Huihui Huang*, and Shuangchun Wen
Author Affiliations
  • Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China
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    DOI: 10.3788/COL202018.093501 Cite this Article Set citation alerts
    Yang Yang, Xinyang Liu, Yan Wu, Ting Li, Fan Fan, Huihui Huang, Shuangchun Wen. Optical edge detection with adjustable resolution based on liquid crystal polarization gratings[J]. Chinese Optics Letters, 2020, 18(9): 093501 Copy Citation Text show less
    (a) Experiment setup: 4f optical system. (b) The orientation of liquid crystal molecules in the grating films and their modulation of light. (c) Illustration of polarization dependency of PG.
    Fig. 1. (a) Experiment setup: 4f optical system. (b) The orientation of liquid crystal molecules in the grating films and their modulation of light. (c) Illustration of polarization dependency of PG.
    (a) Physical picture of the object and the PG. (b) Visual effect of PG under natural light and linearly polarized light. (c) Image of PG under polarization microscope.
    Fig. 2. (a) Physical picture of the object and the PG. (b) Visual effect of PG under natural light and linearly polarized light. (c) Image of PG under polarization microscope.
    (a)–(d) The effect of two liquid crystal PGs superimposed on each other. (e)–(h) Pictures of a light beam without an analyzer. (i)–(l) The edge information patterns after the filter.
    Fig. 3. (a)–(d) The effect of two liquid crystal PGs superimposed on each other. (e)–(h) Pictures of a light beam without an analyzer. (i)–(l) The edge information patterns after the filter.
    (a), (c), and (e) The complete pattern of “HNU” that carries edge information without the polarizer after lens 2. (b), (d), and (f) The final edge pattern of “HNU” filtered by the polarizer and captured by CCD.
    Fig. 4. (a), (c), and (e) The complete pattern of “HNU” that carries edge information without the polarizer after lens 2. (b), (d), and (f) The final edge pattern of “HNU” filtered by the polarizer and captured by CCD.
    Yang Yang, Xinyang Liu, Yan Wu, Ting Li, Fan Fan, Huihui Huang, Shuangchun Wen. Optical edge detection with adjustable resolution based on liquid crystal polarization gratings[J]. Chinese Optics Letters, 2020, 18(9): 093501
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