红外双视场镜头的力学及运动学分析  

Mechanics and Kinematics Analysis of Infrared Dual-Field Lens

作　　者：易乐 吴晓君[1] Yi Le;Wu Xiaojun(Faculty of Mechanical and Electrical,Xi’an University of Architecture and Technology,Xi’an 710311,Shaanxi,China;Xi’an Yunshi Photoelectric Technology Co.,Ltd.,Xi’an 710000,Shaanxi,China)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710311 [2]西安云视光电科技有限公司,陕西西安710000

出　　处：《激光与光电子学进展》2024年第13期368-376,共9页Laser & Optoelectronics Progress

摘　　要：红外双视场镜头在投入使用之前需进行冲击、振动以及高低温试验,试验中有时会出现各种问题,如镜头被破坏、镜头成像不稳定、镜头运动卡顿等。基于上述问题,对一款焦距为25~75 mm、F数为1.0~1.2的红外双视场镜头进行冲击、振动分析。在前人工作的基础上,建立相应的冲击振动模型,基于建立的冲击振动模型对该红外双视场镜头进行相应的仿真分析。对镜头的传动件进行受力分析,提出一种设计凸轮曲线的方法,以减小运动受力,减小凸轮筒在低温下卡死的概率。结合以上工作对该镜头进行相应的冲击振动以及高低温试验,试验结果令人比较满意。研究结果可为红外双视场镜头的仿真分析以及结构设计提供参考,避免因设计阶段中的缺陷造成经济以及时间上的损失。Before the infrared dualfield lens is put into use,it is necessary to carry out impact,vibration,and high and low temperature tests.Sometimes,various problems will appear in the test,such as lens damage,unstable lens imaging,lens motion jamming and so on.In order to solve the above problems,this paper analyzes the impact and vibration of an infrared dualfield lens with a focal length of 25‒75 mm and Fnumber of 1.0‒1.2.On the basis of previous work,the corresponding impact vibration model is established,and the corresponding simulation analysis of the infrared dualview lens is carried out based on the established impact vibration model.Then,the force of the transmission part of the lens is analyzed,and a method of designing the cam curve is put forward to reduce the movement force and reduce the probability of the cam barrel being stuck at low temperature.Combined with the above work,the corresponding impact vibration and high and low temperature tests of the lens are carried out,and the test results are satisfactory.From the above,it provides reference for the simulation analysis and structural design of infrared dualfield lens,and avoids the economic and time losses caused by defects in the design stage.

关 键 词：红外双视场镜头 运动受力分析 冲击振动 凸轮曲线 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置]