红外与毫米波学报2023，Vol.42Issue(3)：345-349,5.DOI:10.11972/j.issn.1001-9014.2023.03.008
太赫兹大孔径折射透镜的焦移特性研究
Focal shift effect of terahertz wide-aperture refractive lens
摘要
Abstract
The focal shift effect of terahertz(THz)beam focusing when using a wide-aperture refractive lens has been investigated.The deviation of focus position caused by the focal shift effect can adversely affect the imaging or measurement quality of a THz system.In this study,reference values of relative focal shifts and combinations of different lens apertures,focal lengths,and working frequencies were analyzed and discussed through theoreti-cal calculation and finite element analysis simulation.When using the commercial lens,the actual focus was de-termined based on the focal shift effect to ensure the working efficiency of a terahertz system.Concerning the cus-tomized lens design,the focal shift distance was compensated in the focal length optimization according to the working frequency.These two approaches guaranteed the good performance of a THz system.关键词
太赫兹透镜/焦移/有限元分析/非球面镜Key words
terahertz lens/focal shift/finite element analysis/aspherics分类
数理科学引用本文复制引用
李惟帆,祁峰,汪业龙,刘鹏翔,刘朝阳..太赫兹大孔径折射透镜的焦移特性研究[J].红外与毫米波学报,2023,42(3):345-349,5.基金项目
Supported by Science,Technology&Innovation Project of Xiongan New Area(2022XAGG0181),Shenyang Young and Middle-aged Sci-ence and Technology Innovation Talent Support Program(RC220523). （2022XAGG0181）
