期刊
CHINESE OPTICS LETTERS
卷 21, 期 3, 页码 -出版社
CHINESE LASER PRESS
DOI: 10.3788/COL202321.030501
关键词
terahertz imaging; binary diffractive lens; phase modulation; three-dimensional printing
类别
This Letter proposes a binary diffractive lens for a scanning imaging system working at 278.6 GHz, which generates a converging beam with a waist diameter of 0.65 mm and achieves a lateral imaging resolution of 1 mm. This low-cost terahertz lens, constituted by concentric rings with different radii, is optimized by stimulated annealing algorithm and fabricated by three-dimensional printing. Compared with the conventional transmissive convex lens, it achieves higher resolution and enhanced imaging quality through a smaller focal spot of the illumination beam. This type of lens would promote terahertz imaging closer to practical applications such as nondestructive testing and other scenarios.
The converging lens is one of the key components in high-resolution terahertz imaging. In this Letter, a binary diffractive lens is proposed for the scanning imaging system working at 278.6 GHz, in which a convergent beam with a waist diameter of 0.65 mm is generated, and 1 mm lateral imaging resolution is realized. This low-cost terahertz lens, constituted by concentric rings with different radii, is optimized by stimulated annealing algorithm and fabricated by three-dimensional printing. Compared with the conventional transmissive convex lens, higher resolution and enhanced imaging quality are achieved via smaller focal spot of the illumination beam. This type of lens would promote terahertz imaging closer to practical appli-cations such as nondestructive testing and other scenarios.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据