Edge detection with meta-lens: from one dimension to three dimensions

Nanophotonics

Yan Yue¹  Zhang Zhengnan¹  Liu Xiaoyuan¹  Chen Mu Ku¹  Wu Yongfeng¹  Zhang Jingcheng¹  Tsai Din Ping¹  Yuan Jiaqi¹ 

[1] Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;

关键词: edge detection;    light field imaging;    meta-lens;    metasurface;   

DOI  :  10.1515/nanoph-2021-0239

来源: DOAJ

【 摘 要 】

Meta-lens has successfully been developed for a variety of optical functions. We demonstrate a light-field edge detection imaging system with a gallium nitride achromatic meta-lens array. It enables edge detection from one dimension to three dimensions. The designed meta-lens array consists of 60 by 60 achromatic meta-lenses, which operate in the visible range from 400 to 660 nm. All of the light field information of objects in the scene can be captured and computed. The focused edge images from one dimension to three dimensions are extracted with depth estimation by image rendering. Three dimensions edge detection is two dimensions edge imaging with depth information. The focused edge images can be obtained by the sub-image reconstruction of the light field image. Our multidimensional edge detection system by achromatic meta-lens array brings novel advantages, such as broadband detection, data volume reduction, and device miniaturization capacity. Results of our experiments show new insight into applications of biological diagnose and robotic vision.

【 授权许可】

Unknown