低温红外镜头柔性支撑结构分析与优化设计  

Analysis and Optimization design of flexible support structure for low temperature infrared lens

作　　者：谢康 张宇[1] XIE Kang;ZHANG Yu(Institute of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《激光杂志》2023年第8期20-25,共6页Laser Journal

摘　　要：为了避免在低温环境(≤-40℃)下对红外镜头的成像的质量造成影响,提出了一种新型透镜柔性支撑结构。基于ANSYS workbench对整机结构进行热-结构耦合分析,能够得到无柔性支撑结构和有柔性支撑结构两种状态下镜片的等效位移和应力的变化量。最后,通过优化柔性支撑结构尺寸,能有效减少温度引起的透镜变形影响。从结果来看:当红外镜头在-40℃的工作环境下,在加装柔性支撑结构下,透镜最大变形量降低了39.6%,在该环境温度下等效应力明显减小。其次,对其支撑结构进行优化设计,镜片面型上的变形量相较于前者降低了2.1%,支撑结构的最大等效应力降低了11.3%。In order to avoid the effect of low temperature(≤-40℃)on the imaging quality of infrared lens,a novel flexible lens support structure was proposed.The structural-thermal analysis of the whole structure was carried out by ANSYS Workbench,and The equivalent displacement and stress variation of the lens in two states of the non-flexible support structure and the flexible support structure can be obtained.Then By optimizing the size of the flexible support structure,the deformation influence of lens by temperature is effectively reduced.The results show that:when the infrared lens works at-40℃and has flexible support structure,the maximum deformation of the lens is reduced by 39.6%,and the equivalent stress in the low-temperature environment is significantly reduced.Secondly,by opti-mizing the support structure,the deformation of the lens surface is reduced by 2.1%,and the maximum equivalent stress of the support structure is reduced by 11.3%.

关 键 词：柔性支撑 红外镜头 低温 优化设计 

分 类 号：TN603.5[电子电信—电路与系统]