Auto-focus lens
In the vast majority of machine vision applications the basic optical parameters object size and working distance are fixed. In such cases, C-mount lenses with a fixed focal length and a manually adjustable focus are used.
If, however, the object size and/or the working distance are variable, the lens' focus has to be adapted quickly to these variations. Ideally, the application software performs this adaption based on an auto-focus algorithm. Hence, the focus mechanism of the lens must have a motor so that it can be adjusted. The Imaging Source offers cameras with an integrated, motorized lens - the zoom cameras.
