温度对车载瞄准镜成像质量影响的仿真研究

Simulation of Temperature Influence on Imaging Quality of Vehicle-Mounted Sight

为了研究温度对车载瞄准镜成像质量的影响,在分析温度变化对光学系统结构参数影响的基础上,以某火炮瞄准镜为研究对象,建立其光学系统模型,通过设置不同的环境温度对系统模型进行了仿真分析。利用弥散斑的均方根值来表征光学系统的成像质量,得到了不同温度下该瞄准镜成像质量的变化规律。仿真结果表明:该瞄准镜在低温环境下的成像质量总体优于高温环境,并且在-20℃左右达到最优。此研究为进一步评估温度对车载光电系统成像性能的影响打下了良好基础,为新型车载瞄准镜的环境适应性设计提供了重要的参考。

In order to study the influence of temperature on imaging quality of vehicle-mounted sight, the influence of temperature variation on structure parameters of the optical system was analyzed. Based on which, and with some wheeled artillery sight as the study object, the optical system model was established,and simulation analysis was made to the system model by setting different ambient temperatures. The rootmean-square value of diffused spots was used to represent the imaging quality of optical system, and the change law of imaging quality for this sight at different temperatures was obtained. Simulation results show that the imaging quality of this sight at low temperature is better than it at high temperature as a whole, with the best quality at about- 20 ℃. This study lays a foundation for further evaluating the influence of temperature on the imaging performance of vehicle-mounted photoelectric system, and is of great reference value to the environmental adaptability design of new vehicle-mounted sight.