15 mm~300 mm宽光谱变焦光学系统设计  

Design of 15 mm~300 mm wide-spectrum zoom optical system

作　　者：吴羽婷 林志强 王敏 WU Yuting;LIN Zhiqiang;WANG Min(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：《应用光学》2023年第3期491-499,共9页Journal of Applied Optics

基　　金：福建省科技重大专项(2021YZ040012)。

摘　　要：变焦光学系统不仅适用于照相、监控以及显微等日常生活中,还被广泛应用于航空航天及国防建设等领域。随着应用范围的扩大,对其性能指标的要求也越来越多,该文设计了一款15 mm~300 mm的宽光谱四组元连续变焦光学系统。该系统采用正组补偿结构实现了20×的光学变焦,工作在450 nm~900 nm光谱范围,工作温度范围为-40℃~60℃;采用了18片球面玻璃镜片,总长160 mm,最大口径66 mm,长焦F数优于5,系统结构紧凑,满足小型化要求。系统在可见光波段,中心视场的调制传递函数(modulation transfer function, MTF)>0.4@145 lp/mm,全视场MTF>0.2@145 lp/mm;在近红外波段,中心视场MTF>0.45@60 lp/mm,全视场MTF>0.2@60 lp/mm。从设计结果可以看出,该设计满足高性能指标要求,对于宽光谱、大变倍比、小型化的变焦光学系统设计具有一定的参考意义。The zoom optical system is not only suitable for daily life such as photography,surveillance and microscopy,but also widely used in aerospace and national defense construction.With the expansion of the application range,there are more and more requirements for its performance indicators.A 15 mm~300 mm wide-spectrum four-component continuous zoom optical system was designed,which used a positive group compensation structure to achieve 20 times optical zoom,operating in the spectrum range of 450 nm~900 nm,and the working temperature range was−40℃~60℃.It also used 18 pieces of spherical glass lenses with a total length of 160 mm,a maximum aperture of 66 mm,and a long focal F number better than 5,which showed the system had compact structure and met the miniaturization requirements.In the visible light band,the modulation transfer function(MTF)of the central field of view was greater than 0.4@145 lp/mm,and the MTF of full field of view was greater than 0.2@145 lp/mm.In the near infrared band,the MTF of the central field of view was greater than 0.45@60 lp/mm and the MTF of full field of view was greater than 0.2@60 lp/mm.From the design results,the proposed design meets the requirements of high performance index,and has certain reference significance for the design of zoom optical system with wide spectrum,large zoom ratio and miniaturization.

关 键 词：变焦光学系统 宽光谱 大变倍比 小型化 光学无热化 

分 类 号：TN202[电子电信—物理电子学] O439[机械工程—光学工程]