用于电晕检测的日盲紫外光学系统设计  

Design of a solar blind ultraviolet optical system for corona detection

作　　者：沈亮 朱世鸿 梁秀玲 SHEN Liang;ZHU Shihong;LIANG Xiuling(Fujian Provincial Key Laboratory of Photonics Technology,Key Laboratory of Optoelectronic Science and Technology for Medicine(Ministry of Education),College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室福建省光子技术重点实验室,福建福州350007

出　　处：《光学仪器》2023年第4期40-46,共7页Optical Instruments

基　　金：福建省科技厅引导性项目(2017H0010);福建省科技重大专项(2021YZ040012)。

摘　　要：日盲紫外光学探测器可以精准的接收到电晕放电产生的紫外辐射。利用Zemax软件设计了一款定焦日盲紫外光学系统,该系统由五片球面透镜构成,工作波段240~280 nm,匹配靶面直径18 mm的紫外像增强器,F数为2.5,焦距为50 mm,视场角为20.4°,光学总长为72 mm。调制传递函数在空间频率20 lp/mm处全视场均大于0.8,最大畸变小于0.5%。分析了系统在−20~60℃的离焦现象,计算了各温度下的热离焦量,采用被动式机械补偿的方法校正了由温度变化产生的热差。最后,通过蒙特卡洛分析模拟,对系统给出了合理的公差分配,分析结果表示系统加工装配后仍具有较好的成像质量。The solar blind ultraviolet optical detector accurately captures the ultraviolet radiation generated by corona discharge.In this paper,a fixed focal solar blind optical system was designed by using Zemax.The system comprises five standard spherical lens and has a working wavelength range of 240-280 nm,the F number of 2.5,the focal distance of 50 mm,a field angle of 20.4°,an optical length of 72 mm and matches with a ultraviolet image intensifier with a target diameter of 18 mm.The full field of modulation transfer function is greater than 0.8 at the spatial frequency of 20 lp/mm,the maximum distortion is less than 0.5%.The defocusing phenomenon of the system was analyzed across a temperature range of−20℃to 60℃.The thermal defocusing amount was calculated at different temperatures,and a Passive mechanical compensation method was employed to correct thermal dispersion caused by temperature changes.Finally,through Monte Carlo simulation analysis,the system is given a reasonable tolerance allocation.The analysis results show that the system still maintains good imaging quality even after processing and assembly.

关 键 词：日盲紫外 光学设计 ZEMAX 公差分析 

分 类 号：TN23[电子电信—物理电子学]