用于刑侦检测的日盲紫外折衍混合变焦光学系统设计  

Design of a Solar Blind Ultraviolet Refractive-Diffractive Hybrid Zoom Optical System

作　　者：宋逸辰 唐玉凤 赖涛 袁沛琦 丁骁炜 毛珊 赵建林[1] Song Yichen;Tang Yufeng;Lai Tao;Yuan Peiqi;Ding Xiaowei;Mao Shan;Zhao Jianlin(Key Laboratory of Light-Field Manipulation and Information Acquisition,Ministry of Industry and Information Technology,Shaanxi Key Laboratory of Photonics Technology for Information,School of Physical Science and Technology,Northwestern Polytechnical University,Xi'an 710129,Shaanxi,China)

机构地区：[1]西北工业大学物理科学与技术学院光场调控与信息感知工业和信息化部重点实验室,陕西省光信息技术重点实验室,陕西西安710129

出　　处：《光学学报》2024年第4期273-282,共10页Acta Optica Sinica

基　　金：国家自然科学基金(62375222,61927810,61905195);陕西数理基础科学研究项目(22JSQ025);西北工业大学中央高校基本科研业务(310202011QD001)。

摘　　要：基于ARTCAM-407UV-WOM型紫外探测器,结合光学系统成像性能要求和光学元件成像特性,提出一种基于Qcon非球面和衍射表面的日盲紫外折衍混合变焦光学系统设计方法。所设计的系统仅由5块透镜组成,采用氟化钙和熔融石英两种材料,工作波段为0.24~0.27μm,连续变焦范围为40~100 mm。分析结果显示,该系统在整个变焦范围内,奈奎斯特空间频率在11 lp/mm处的调制传递函数值均高于0.7,全视场畸变小于0.06%,表明该设计方法能够满足日盲紫外连续变焦系统结构简单、体积小、像质优良、像面稳定等设计和刑侦检测使用要求,对此类光学系统的设计具有一定借鉴意义。Objective The ozone layer in the sky efficiently blocks ultraviolet light with a wavelength range of 0.24-0.28μm,preventing this spectrum of solar radiation from reaching the ground.This creates the"solar blind ultraviolet"band,which has numerous advantages in civilian,military,and police applications.Especially,it plays a valuable role in criminal investigation science,particularly in retrieving physical evidence without destroying the scene.It can access and search scenes quickly while extracting high-quality images of fingerprint marks,bloodstains,semen spots,fire and explosive residues,and other physical evidence.Nevertheless,the unique application of solar blind ultraviolet(UV)bands and optical materials poses challenges that traditional optical design cannot meet.The development of aspherical and diffractive surfaces offers an effective new solution to this problem.The rapid advancement of ultra-precision machining and testing technology has made it possible to machine and test diverse aspherical surfaces with high precision.The advantages of Qtype aspherical surfaces,such as efficient optimization of optical systems and simplified processing of aspherical surfaces,are even more highly valued by the industry.Therefore,it is essential to introduce the benefits of Q-type aspheres and diffractive optical elements into the design of day-blind UV optical systems.We hope that our design results can facilitate the development and application of UV refractive-diffractive hybrid imaging optical systems.Methods Based on the requirements of the actual application environment,the detector selection is conducted for the dayblind UV optical system,which includes the need for stable zoom.To meet these needs,we comprehensively consider two optical materials—fused silica and calcium fluoride due to their cost and performance in the UV range.We optimize the initial structure with Zemax OpticStudio software and set Q-type aspherical and diffractive surfaces on a lens substrate.Then,we reduce the number of system lenses to

关 键 词：光学设计 混合光学系统 Q型非球面 日盲紫外光 变焦光学系统 

分 类 号：O436[机械工程—光学工程]