摘要
根据夜视作用距离指标要求,设计了一种船用摄像机的主动红外照明系统。首先给出了系统整体架构,提出根据光电传感器最低感光照度进行夜视照明设计,并进行了公式推导;分析和设定了影响夜视作用距离的参数,在此基础上提出采用波长为0.85μm的红外LED阵列作为照明光源;针对镜头为电动变焦镜头而LED出光角度固定带来的不匹配问题,提出将LED阵列分四组并根据镜头焦距不同进行实时控制的解决方案,继而采用PIC单片机实现了系统控制功能。试验结果表明,该主动照明系统实用有效,在特定环境200 m距离内目标成像级别达到了B级,同时大幅提高了整体系统的寿命。
According to the requirement of night vision operating range, an active infrared illumination system for ship- board eamera is designed. Firstly,the overall structure of the system was given,and the design of night vision illumi- nation system was proposed according to the lowest sensitive illumination of the photoelectric sensor, and the formula was deduced. Then, the parameters affecting night vision operating range were analyzed and set up. Based on this, an infrared LED array with a wavelength of 0. 85 μm was proposed as the illumination source. And then, the camera zoom lens does not match the emitting light angle of LED, so the LED array was divided into four groups according to different solutions for real-time control of the focal length of the lens,and thus,the control thnction of the system was realized by using PIC mierocnntroller. The experimental results show that the active lighting system is practical and effective, and the target imaging level reaches B level in the specific environment of 200m distance. At the same time, it greatly improves the life of the whole system.
出处
《激光与红外》
CAS
CSCD
北大核心
2017年第5期562-567,共6页
Laser & Infrared
关键词
摄像
夜视
主动红外
作用距离
camera
night vision
active infrared
visual range
