测试技术学报2025，Vol.39Issue(3)：261-266,6.DOI:10.62756/csjs.1671-7449.2025032
宽带长焦深近红外衍射元件设计及特性研究
Design and Performance Research of A Broadband Near-Infrared Diffractive Lens with Extended Depth of Focus
摘要
Abstract
Due to their limited focal depth of field during imaging,traditional lenses require frequent refo-cusing,which increases the complexity and cost of optical systems.This paper presents the design of a broadband near-infrared diffractive lens with an extended depth of focus,achieving a focal depth ten times greater than that of conventional focusing lenses.Through numerical simulations using scalar diffraction theory,the focusing characteristics of this element are studied.The results demonstrate that the device achieves an extended focal depth of more than 0.25 mm(from 0.25 mm to 0.5 mm away from the lens)in the wavelength range of 1.45～1.65 μm and maintains excellent broadband performance and good sup-pression of sidelobes at the focal plane.This novel design of diffractive lens enables extended depth of focus imaging,offering a new direction for optical system design.It significantly reduces the frequency of refocusing,lowers system complexity and cost,and improves image quality.This technology is expected to be widely applied in various fields,such as alignment systems,microscopic imaging,medical imaging,and surveillance systems.关键词
衍射元件/长焦深成像/近红外/宽带成像/标量衍射理论Key words
diffractive lens/extended depth focus imaging/near-infrared/broadband imaging/scalar dif-fraction theory分类
计算机与自动化引用本文复制引用
杨根森,万顺,王军,王海洋,杨建军,贾平岗..宽带长焦深近红外衍射元件设计及特性研究[J].测试技术学报,2025,39(3):261-266,6.基金项目
国家自然科学基金重点项目(51935011) （51935011）
国家科技重大专项(J2019-V-0015-0110) （J2019-V-0015-0110）
山西省科技创新人才团队专项(202204051001016) （202204051001016）
