温度和气压对车载光学系统成像质量的影响研究

摘要

In order to study the influence of temperature and air pressure on imaging quality of vehicle -mounted opti-cal system,the influence of temperature variation and air pressure variation on structure parameters of optical system was analyzed.Taking CCD camera of a tracked armoured reconnaissance vehicle as an example,optical system model was established,and the system model was simulated and analyzed by setting different temperatures and air pressures. The imaging quality of optical system was characterized by the optical -modulation transfer function,and the change laws of imaging quality under different temperatures and air pressures were obtained.The simulation results show that the imaging quality of optical system becomes worse when the changes of temperature and air pressure are bigger,and the influence of air pressure changes is bigger than that of the temperature changes.The study has a great reference value for environmental adaptability design of new type vehicle -mounted optical system.%为了研究温度和气压对车载光学系统成像质量的影响，在分析温度和气压变化对光学系统结构参数影响的基础上，以某型履带式装甲侦察车 CCD 摄像机为研究对象，建立其光学系统模型，通过设置不同的温度和气压对系统模型进行了仿真分析。利用光学调制传递函数来表征系统的成像质量，得到了不同温度和气压下系统成像质量的变化规律。仿真结果表明：温度和气压的变化幅度越大，光学系统的成像质量越差，并且气压变化对光学系统成像质量的影响程度大于温度变化。此研究对新型车载光学系统的环境适应性设计提供了重要的参考。