Focal-Length Measurement of Multifocal Metalens by Using Far-Field Imaging

被引：0

作者：

Zhou, Ming ^{[1
,2
]}

Shan, Dengyu ^{[1
]}

Gong, Jiaheng ^{[2
]}

Huang, Haiyang ^{[2
]}

Li, Wei ^{[2
]}

机构：

[1] Westlake Inst Optoelect, Zhejiang Key Lab 3D Micro Nano Fabricat & Characte, Hangzhou 311421, Zhejiang, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Mat Integrated Circuits, Shanghai 200050, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2025年 / 37卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Lenses; Gray-scale; Measurement by laser beam; Light sources; Optical imaging; Length measurement; Adaptive optics; Optical filters; Metasurfaces; Light emitting diodes; Metalens; multifocal; secondary imaging technology; focal length measurement; METASURFACES;

D O I：

10.1109/LPT.2025.3531044

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article used far-field light source to investigate the focal length of the short focal length, multifocal metalens. The feasibility of the scheme was analyzed by using imaging simulation. In addition, the relative error between far-field imaging method and collimated laser measurement was analyzed. The data results show that the relative error is 0.49%, as the point light source located 2000mm away, for ideal test lens with focal length of 10mm. An optical system composed of double lenses was constructed to measure the focal length of a metasurface with four focal points. The experimental results show that the system can determine the focal position within a step of 0.1mm.

引用

页码：219 / 222

页数：4

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