摘要
作用距离是紫外成像探测系统的重要综合性能指标之一。依据AlGaN日盲紫外焦平面成像系统的成像原理,考虑到影响紫外系统作用距离的各个因素,分别对点目标和面目标的作用距离进行了理论推导。受到日盲紫外成像系统作用距离影响的因素主要包括目标辐射特性、大气传输衰减、光学系统、探测器、电子处理系统等。从目标的辐射能量传递出发,结合信噪比与虚警概率、探测概率的关系,推导出了紫外成像系统作用距离的理论公式,并结合系统参数进行实例计算。分析得出提高系统有效通光口径、光学透射率、滤波降噪及增加积分时间等方法可用于增加紫外成像系统的作用距离。
The operating distance is one of the most important comprehensive performance indexes. Based on the imaging principle of this AlGaN solar-blind UV focal plane array （FPA） imaging system considering the influence factors of the UV system, the distance of point target and extended target are calcnlated respectively. The influencing factors of the solar-blind UV imaging system include the feature of target, the attenuation of the atmosphere transmission, optical system and UV FPA detectors. From the transfer of radiation energy of targets, the operating range theoretical formulas are deduced combing the relationship of signal-to-noise, fault prediction and detection prediction. Finally, the system parameters are inputted into the operating formula. The operating formula can provide theoretical basis for performance assessment of the UV imaging system. The operating rang can be improved by the means of increasing effective optical aperture, optical transmissivity, integration time and adopting noise reduction methods.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第6期77-81,共5页
Laser & Optoelectronics Progress
