Optical edge detection with adjustable resolution based on liquid crystal polarization gratings
Optical edge detection with adjustable resolution based on liquid crystal polarization gratings
复制标题
基于液晶偏振光栅的分辨率可调光学边缘检测
DOI：
10.3788/col202018.093501
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发表时间：
2020-09
影响因子：
3.5
通讯作者：
Shuangchun Wen
中科院分区：
文献类型：
--
作者：
Yang Yang;Xinyang Liu;Yan Wu;Ting Li;Fan Fan;Huihui Huang;Shuangchun Wen
光学边缘检测作为图像处理的一部分，在光学模拟计算中提取图像信息起着重要的作用。本文提出了一种实现光学边缘检测的新方法。该设计基于两个周期为2.2 mm的液晶偏振光栅，其功能为空间微分器。我们通过实验证明了宽带光学检测和实时可调分辨率。该方法具有使用方便、制作工艺简单、分辨率实时可调等优点。它可以指导光学领域和其他实际场景（如计算机中的机器视觉）中更重要的应用。
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.