红外光学系统冷反射分析和定量计算方法

红外光学系统冷反射指制冷型探测器看到自身的反射像，它严重影响红外光学系统的图像质量。光学系统设计中控制冷反射的强度往往与提高光学系统像质和满足边界要求之间是矛盾的。详细介绍了冷反射强度仿真分析和评估方法，提出了冷反射辐射的信号与系统噪声之比的定量计算模型。对两套红外系统的冷反射强度进行了仿真分析和实验测试。研究结果表明，冷反射强度实验测试与仿真计算结果一致，冷反射仿真分析和定量计算在光学设计中能够有效地评估冷反射强度，保证光学系统设计质量。

Analysis and quantitative calculating methods for Narcissus of infrared optical system

Narcissus refers to the case that the cooled detector can "see" its own reflecting image,which may affect the image quality of infrared system seriously.In the process of optical system design,the controlling of Narcissus intensity is often contradicting with the improving of image quality and satisfying of boundary requirements.Simulation analysis and evaluation method of Narcissus intensity were presented in detail.A quantitative model was proposed for calculating the ratio of Narcissus radiation signal with system noise.By building a proper platform,the simulation analysis and experimental test about the Narcissus intensity of two infrared systems were carried out.The results show that the Narcissus intensity of the experimental test is consistent with the simulation result.Therefore,Narcissus intensity can be effectively evaluated by simulation analysis and quantitative calculation in optical design to ensure the quality of optical system.