Choice of Lens in Machine Vision System

The main parameters of lens,used in machine vision,have been presented,such as focal length,relative aperture,angle of view,working distance,field of vision(FOV),and so on.The common classifications about lens have been introduced here,and the relations between the various parameters are summed up,which impact on imaging.At the end,the skill of choosing suitable lens in the machine vision has introduced,and the actual result proves it is useful.