In this paper,the optomechanical structure design and optomechanical thermal integration analysis of the visible-light zoom lens of the space-based photoelectric tracking platform are carried out. According to the temperature adaptability index of the tracking lens:-20~ 50 ℃,the optical integration analysis of zoom lens is carried out. Firstly,the finite element model of zoom lens is established. Secondly,the thermoelastic deformation of the lens is calculated by applying temperature load to the optical system with Patran software,Nastran software is used to calculate the displacement point clouds of the mirror nodes of each optical element before and after deformation. Secondly,the Zernike coefficient and rigid body displacement of each component are analyzed by using Sigfit opto-mechanica interface software. The analysis results are imported into Zemax to evaluate the influence of lens surface shape change and rigid body displacement change on MTF. The analysis results show that the MTF @100 lp/mm values of the optical system under the temperature load of -20~50 ℃ are all greater than 0.2,meeting the technical requirements. Through the temperature reliability experiment,the temperature adaptability of the zoom lens is tested. Finally,the temperature adaptability of zoom lens and the accuracy of optical integration analysis are tested through the temperature reliability experiment.
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杜伟峰,刘永志,高文杰,胡雄超.空基跟踪平台变焦镜头光机热集成分析[J].激光与红外,2020,50(5):615~622 DU Wei-feng, LIU Yong-zhi, GAO Wen-jie, HU Xiong-chao. Thermal structure optical integrated analysis of zoom lens for airborne tracking platform[J]. LASER & INFRARED,2020,50(5):615~622