• 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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    Abstract

    Optical edge detection, a part of image processing, plays an important role in extracting image information used in optical analog computation. In this Letter, we raise a new way to realize optical edge detection. This design is based on two liquid crystal polarization gratings with a period of 2.2 mm, which function as a spatial differentiator. We experimentally demonstrate broadband optical detection and real-time adjustable resolution. The proposed method takes advantage of the convenience to use, simple fabrication process, and real-time tunable resolution. It may guide more significant applications in the optical field and other practical scenarios like machine vision in computers.
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    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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    Category: Other Areas of Optics
    Received: Mar. 23, 2020
    Accepted: May. 9, 2020
    Posted: Jul. 20, 2020
    Published Online: Jul. 22, 2020
    The Author Email: Huihui Huang (huangh@hnu.edu.cn)