长焦距离轴全反射式三档变焦光学系统设计  

Design of Off-Axis All-Reflective Three-Gear Zoom Optical System with Long Focal Length

作　　者：曹一青 Cao Yiqing(School of Mechanical and Electrical Information Engineering,Putian University,Putian 351100,Fujian,China;Fujian Laser Precision Machining Engineering Technology Research Center,Putian 351100,Fujian,China)

机构地区：[1]莆田学院机电与信息工程学院,福建莆田351100 [2]福建省激光精密加工工程技术研究中心,福建莆田351100

出　　处：《激光与光电子学进展》2023年第19期97-104,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62205168);福建省自然科学基金(2020J01916);莆田市科技计划项目(2020GP004);莆田学院引进人才科研启动费项目(2019010)。

摘　　要：提出了一种基于变焦原理和初级像差理论的机械补偿式的长焦距离轴全反射式三档变焦光学系统设计方法。首先,建立了同轴四反射镜变焦光学系统初始结构求解模型,基于该模型,应用开发的自适应变异概率遗传算法对其进行求解,得到了同轴系统部分初始结构参数;然后,将其进行适当偏心和倾斜来消除共轴系统中心遮拦问题,结合光学设计软件Zemax对离轴系统像差进行校正。最后,应用上述设计方法,系统中各块反射镜光学面采用非球面设计,设计出高成像质量的焦距为300、600、900 mm的三档变焦离轴四反射镜光学系统。结果表明,该方法为离轴全反射式三档变焦光学系统设计提供了一种有效手段,能设计出满足实际应用需求的系统。The zoom principle and primary aberration theory are used to study the design method of a mechanically compensated all-off-axis reflective three-gear zoom optical system with long focal length.The initial structure solving model for coaxial four-reflective mirrors zoom optical system is developed and based on the model,the adaptive variant probability genetic algorithm developed is used to address it and the partial initial structure parameters of the coaxial system is obtained;further,it is properly made off-center and tilt to remove the central obscuration issue of the coaxial optical system,and the aberration of the off-axial system is corrected using optical design software Zemax.Using the design method discussed above,an aspheric surface design is adopt in the optical surfaces of the system's all-reflective mirrors,yielding a high imaging quality off-axis four-reflective mirrors zoom optical system with three-gear zoom focal lengths of 300 mm,600 mm,and 900 mm.The results show that the method provides an effective measure for an off-axis allreflective three-gear zoom optical system and that the system can be designed to meet practical needs.

关 键 词：几何光学 光学系统设计 四反射镜 三档变焦 机械补偿 长焦距 

分 类 号：O435.2[机械工程—光学工程]