The Software Concept
© PHYTEC Messtechnik GmbH 2011 L-740e_0
41
3.2
Connecting the Lens
The camera supports lenses with C-Mount or CS-Mount connectors.
Refer to section 2.3 for instructions on connecting the lens.
Hints for Selecting the Lens
In order to take full advantage of the quality and the features of the
camera, it is important that you select a lens that is optimized to your
application. In the following section we have provided some helpful
hints on how to proceed in the selection of a suitable lens.
•
Focal Length
With the focal length you determine the visible screen window, or
image portion captured by the camera.
The focal length depends on the size of the sensor-chip, the
distance from the object and the focal length of the lens being
used.
The screen window should be optimized so that the object being
captured is always fully visible on the screen, and also so that the
amount of unused screen space surrounding the object is
minimized. Otherwise the object would be displayed unnecessarily
small and the camera’s resolution would not be fully utilized.
The sizes of the various sensor are documented in chapter .
5
Note:
When you use a smaller resolution, only a section of the complete
image sensor is used. Therefore, for each sub-resolution, a
different focal length is specified.
When using a USB-CAM-051H, 151H, 052H or 152H, it is
possible to use the binning method. It combines pixels, so that the
whole sensor space can be used. The focal length remains the
same.
