摘要
介绍视频监控系统摄像机照度与环境、镜头光圈的关系,镜头的种类、规格尺寸,镜头的选择与设置场所,并对摄像机视场、视场角、焦距计算和镜头最大光圈的计算公式进行分析阐述。
This paper introduces the relations between illuminance of the camera in video monitoring system and the environment as well as the lens aperture,type,specification and the size of camera lens,the selection of camera lens and site setting. It also analyzes and states the formulas for finding the field of view,angle of view and focal distance of camera as well as that for finding the maximum lens aperture.
出处
《建筑电气》
2011年第4期53-57,共5页
Building Electricity
关键词
视场
焦距
摄像机镜头
CCD
最大光圈
Field of view Focal distance Camera lens CCD Maximum lens aperture
