Limit detection distance calculation method and detection performance in infrared detection system

作者：Feng, Bin^*; Ni, Jinping; Wu, Zhichao

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2016, 10(1-2): 40-46.

• Infrared light screen
• The detection distance
• Detection capacity
• SNR

Due to the fact that detection performance of infrared detection target has problems of low capacity and capture rate, this paper studies detection distance calculation method of infrared detection target, according to characteristics of detecting light screen. Detection distance calculation model is deduced under different illuminate and target sizes, factors influencing detection distance are analyzed, and improving method is obtained; combining with infrared photoelectric detector characteristics and optical system parameters, limited detectable distance calculation method of infrared detection target is studied. Due to the relationship among response time, signal to noise ratio threshold and dark current of photoelectric detectors, limited detectable performance calculation function is set up, as well as variation rules among detection distance, optical system slit width, target radiation brightness and signal to noise ratio. By calculation and analysis, results show that under certain illuminate condition, when the target radiation brightness is stronger, detection range and capacity are stronger too; the higher SNR, the stronger the detection capacity.

• 出版日期2016-1
• 单位西安工业大学