红外动态景象仿真中光学系统效应仿真

在采用数字图像注入方法对红外成像跟踪搜索系统或红外预警系统进行仿真试验中，红外动态场景仿真是仿真系统的核心技术，而光学系统效应仿真是红外动态场景仿真中的重要部分。由于仿真对象为非相干红外成像系统，光学系统效应可以只考虑其能量域内成像效应和像弥散或能量分散效应。光学系统质量一般用调制传递函数描述，可由调制传递函数计算点扩展函数，并建立基于点扩展函数的光学系统效应模型。只要调制传递函数给定准确，此方法建立的光学系统效应仿真模型的逼真度便有保证，而调制传递函数可以通过普通的光学系统测试方法获得。

Optic system effect simulation in IR dynamic scenes simulation

In the simulation test of IR tracing and searching system or IR warning system by digital image injecting, IR dynamic scenes simulation is the core technology, and optic system effect simulation is the important part of IR dynamic scenes simulation. Since the object is incoherent IR imaging system, imaging effect and image disperse or energey disperse effect in energey domain are only considered for optic system effect. In general, optic system quality can described by MTF. Point-expanded function can be calculated using MTF, and optic system effect model can be established based on point-expanded function. So long as MTF is accurate, the fidelity of optics system effect model established by this way can be guaranteed.