Mechanics and Kinematics Analysis of Infrared Dual-Field Lens

Before the infrared dual-field 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 dual-field lens with a focal length of 25-75 mm and F-number 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 dual-view 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 dual-field lens, and avoids the economic and time losses caused by defects in the design stage.