摘要
传统的红外系统设计理论直接引用D*,没有考虑D*的温度特性和红外系统中1/f噪声的影响,对此进行了修正。从探测率的物理特点出发,推导探测率D*与光谱探测率D*(λ)的关系式,当辐射源的温度与测试D*用的黑体温度不同时,引入波段探测率修正因子。同时,提出一种在1/f噪声成分大的条件下对窄带噪声测量的D*值进行修正的方法。在此基础上提出D*值的综合修正方法。所述数学模型可作为系统设计和性能评价的理论依据。
Detectivity （D^＊） is applied firsthand and it don＇t consider the factors of temperature characteristic of detectivity and 1/f noise in traditional design theory of infrared systems. Detectivity is corrected in this paper. The relation of detectivity （D ^＊ ） and spectral detectivity （D ^＊ （A） ） has been derived from considering physical characteristic of detectivity. The correcting factor of wave band detectivity is introduced while radiation source temperature is not equal to blackbody temperature testing D^＊. It is brought forward at the same time the method of correcting D^＊ on the condition of large 1/f noise and measuring noise with narrow band. The comprehensive correcting method is put forward on above basis. These mathematics models are advanced as theoretical basis for the system design and performance evaluation.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第10期1071-1073,共3页
Laser & Infrared
关键词
红外探测器
探测率
温度特性
1/f噪声
系统设计
infrared detector
detectiyity
temperature characteristic
1/f noise
system design
