Design And Research Of High-Order Aspheric Camera And Imaging System

During the development of the airborne camera,the design of the lens' s optical structure and the debugging after the assembly of the camera are the key steps to determine the imaging quality of the airborne camera.In this paper,the lens of the airborne camera is designed,and the simulation imaging system for debugging the airborne camera is studied.An imaging lens structure of the airborne camera is designed by using ZEMAX optimization software.The ground simulation imaging system is built by analyzing the actual operation attitude of the airborne camera.The main research contents include the following aspects:Firstly,the optical lens of the airborne camera is designed.Aiming at the five basic aberrations existing in the optimization process,its formation principle and optimization method are analyzed.Using the double-gauss structure as the initial optical structure,the optical system is optimized by adding spherical and non-spherical mirrors,and MTF values of the two optical structures were compared and analyzed.After diffusing the circular radius and structural complexity,it is found that non-The indexes of spherical optical structure are superior to those of spherical optical structure.The aspheric structure was put into practical development,and the developed aspheric mirror was surface inspected.Secondly,for the construction of the imaging system,the ground scene simulation device is mainly designed,the three-axis attitude simulation turntable is designed and the mechanical structure of two-axis external force Counter-time turntable device is designed.The three-axis attitude simulation turntable and the two-axis external force Counter time turntable device are used to build the overall system by shafting design after modeling and analysis of the actual operation of the carrier.The ground scene simulator is designed and built by analyzing the actual running speed of the carrier,calculating and obtaining the speed parameter matching,using Hyper Mesh software for finite element pretreatment of the camera part and the external force reverse turntable part,and using NASIRAN software for static and modal analysis to ensure that the mechanical structure is reasonable and then put into actual processing.Finally,the overall imaging system is built and the ground simulation imaging experiment is carried out.The three-axis attitude simulation turntable cooperates with the two-axis external force reverse time turntable to simulate the imaging of the airborne camera under the influence of pitch,roll and yaw attitude at different heights,collect and analyze the pictures,adjust the camera according to the collected pictures,improve the imaging quality of the camera,and carry out the outdoor actual scene imaging experiment.To verify the actual imaging quality of aspheric camera after debugging.