凝视型红外成像系统中冷像的仿真分析  

Simulation analysis of the narcissus in the staring infrared imaging system

作　　者：刘志祥[1] 马冬梅[1] 胡明鹏[1] 马磊[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《红外与激光工程》2008年第4期702-705,共4页Infrared and Laser Engineering

摘　　要：在凝视型红外成像系统中,虽然焦平面阵列的非均匀性校正可以消除冷像的影响,但是校正后工作条件发生改变时,冷像变化的影响会显现出来,因此,在设计凝视型红外成像系统时冷像的分析显得很重要。通过分析红外光学系统中冷像形成的原因,根据辐射学原理分析各表面的冷像贡献,并建立了冷像等效温差(NITD)的数学模型。以该数学模型和动态数据交换接口(DDE)技术为基础,运用光学软件ZEMAX及仿真软件MATLAB进行联合仿真,实现了凝视型红外成像光学系统的冷像等效温差的计算和分析,并给出了焦平面阵列上冷像的效果图。实现了在凝视型红外成像系统光学设计过程中对冷像的评估。In the staring infrared imaging system,narcissus effects can be removed by the nonuniformity correction of the focal plane array,however,narcissus variation effects may be noticeable after the calibration conditions are changed. Therefore,narcissus analysis is very important for design of the staring infrared imaging system. By analyzing the sources of narcissus in the infrared imaging system and the narcissus contribution of each surface according to the radiometry theory,the mathematic model of narcissus induced temperature difference （NITD） was established. On the basis of the mathematic model and dynamic data exchange （DDE） interface technology,combination simulation was achieved by the lens design software ZEMAX and simulation software MATLAB. Computation and analysis of the narcissus induced by temperature difference of the staring infrared imaging system were realized,and the simulation diagram of the narcissus effects in the focal plane array was presented. The narcissus evaluation was realized in the process of the optical design of the staring infrared imaging system.

关 键 词：凝视型红外成像系统 冷像等效温差 ZEMAX MATLAB仿真 

分 类 号：TN211[电子电信—物理电子学]