Dual field-of-view camera of 100mm and 400mm focal length was designed based on the given aerial camera optical design index,and the transfer function of long focal distance and full field is more than 0.3.In order to reduce the mass and improve the dynamic rigidity of aerial camera,the wall thickness and rib width of the main supporting structure in aerial camera were taken as the design variables.The natural frequency was ensured no less than a specific value,which was the constraint condition.The NX7.5 software was used to do the structure optimization design for the camera.The optimization result shows that the weight of zoom lens is reduced by 0.7 kg and the first-order natural frequency increases by 13 Hz.Modal analysis and thermal analysis were performed for the optimized camera,and the analysis results verify the correctness of the optimization design.Finally,the validity of the design was verified by the test.The optic-mechanical design of dual FOV aerial camera can efficiently ensure the performance of the whole system and can satisfy the requirement.
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徐迪孟,王平,付海双,史文欣.双视场航空相机光机优化设计[J].激光与红外,2017,47(7):853~857 XU Di-meng, WANG Ping, FU Hai-shuang, SHI Wen-xin. Optic-mechanical optimization design of dual FOV aerial camera[J]. LASER & INFRARED,2017,47(7):853~857