飞行器红外成像的关键技术是将接收的红外辐射能量转换为可见的灰度图像。基于飞行器红外辐射特性和红外传感器的成像原理，提出了一种利用射线跟踪（Ray tracing）结合反向蒙特卡洛法（RMC）的飞行器目标红外辐射图像生成技术的实现方法。首先利用三维建模软件建立飞行器的几何模型，并利用商业软件 ICEM对模型进行网格划分，然后基于流体力学基本守恒定律 ——N-S方程组的基本原理，利用 Fluent软件对飞行器外流场进行数值模拟，获得飞行器的温度场分布，最后利用反向蒙特卡洛法对射线的辐射传递过程进行概率模拟计算，利用 MODTRAN进行了大气传输衰减的透过率计算，利用射线跟踪技术获得了飞行器的红外辐射图像。

The key technology of aircraft infrared imaging is to convert the received infrared radiation energy into visible gray images. Based on the infrared radiation characteristics of the aircraft and imaging principle of the infrared sensor, a method to realize the infrared radiation image generation technology of the aircraft target using ray tracing combined with the reverse Monte Carlo method (RMC) is proposed. First, the geometrical model of the aircraft is established using the 3D modeling software, which is meshed by the commercial software ICEM. Then, based on the basic law of conservation of fluid mechanics and principle of the Navier-Stokes equations, external flow field distribution is numerically simulated by Fluent, thus, the temperature field distribution of the aircraft is obtained. Finally, the radiation transmission process was simulated by the RMC, and the transmissivity of the atmospheric transmission attenuation was calculated through the MODTRAN. The infrared radiation image of the aircraft was obtained by the ray tracing technique.