轻小型金属基增材制造光学系统  

Light-and-small optical systems by metal-based additive manufacturing

作　　者：付强 闫磊 谭双龙 刘洋 王灵杰[1] 张新[1] FU Qiang;YAN Lei;TAN Shuang-long;LIU Yang;WANG Ling-jie;ZHANG Xin(Key Laboratory of Optical System Advanced Manufacturing Technology,Chinese Academy of Sciences,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,中国科学院光学系统先进制造技术重点实验室,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国光学（中英文）》2022年第5期1019-1028,共10页Chinese Optics

基　　金：中国科学院青年创新促进会资助(No.2021221);吉林省科技发展计划青年成长科技计划项目(No.20210508054RQ)。

摘　　要：为了实现用于深空低冷目标探测的长波红外折反射式光学系统的进一步轻小型、低辐射和大视场,对局部制冷光学系统、拓扑优化金属基反射镜设计、增材制造、金属基光学加工与表面改性等进行研究。首先,设计完成了紧凑型局部制冷折反射式光学系统,口径为55 mm,焦距为110 mm,视场达到4°×4°;其次,利用拓扑优化理论,设计完成了主镜组件、次镜组件和连接筒,三阶和四阶模态达到1213.7 Hz;接着,采用增材制造、单点金刚石车削、表面改性、表面镀金等手段完成前组光学元件的研制,利用定心装配工艺完成光机装调;最后,对光机装调后的系统性能进行了测试。测试结果表明:光学系统全视场范围内调制传递函数均达到衍射极限,重量仅为96.04 g。金属基增材制造方法可以作为提升光学系统性能的有效手段。In order to realize the target of light and small,low radiation and large field of view of the longwave infrared catadioptric optical system for deep-space low-temperature target detection,the local cooling optical system,topology optimization,metal-based mirror design,additive manufacturing,Single Point Diamond Turning(SPDT)for metal mirrors and surface modification are studied.First of all,a compact catadioptric optical system with partially cooled is designed,in which the aperture is 55 millimeters,the focal length is 110 millimeters and the field of view is 4 degrees by 4 degrees.Secondly,the primary mirror assembly,the secondary mirror assembly and the connecting baffle are designed using the topology optimization theory,and the third order mode and fourth order mode reach 1213.7 Hz.Then,the front group optical mirrors assembly are developed by means of additive manufacturing,SPDT,surface modification and surface gold plating.We complete the optical mechanical assembly using the centering assembly method.Finally,the performance of the system after optical mechanical centering is tested.The test results show that the Modulation Transfer Function(MTF)curves of the optical system reach the diffraction limit in the whole field of views,and the weight is only 96.04 grams.Additive manufacturing method can be used as an effective means to improve the performance of optical systems.

关 键 词：光学系统 金属反射镜 增材制造 局部制冷光学系统 拓扑优化 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] V261.8[航空宇航科学与技术—航空宇航制造工程]