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Prosilica GC Technical Manual V2.1.0
46
Camera dimensions
C-Mount flange focal distance
Flange focal distance is the optical distance from the mounting flange to image
sensor die. Prosilica GC C-Mount cameras are optically calibrated to a standard
17.526 mm optical flange focal distance, with a ±10 µm tolerance.
Adjustment of C-Mount
The C-Mount is adjusted at the factory and should not require adjusting. If for
some reason the lens mount requires adjustment, use the following method.
Loosen locking ring
Use an adjustable wrench to loosen the locking ring. Be careful not to scratch
the camera. When the locking ring is loose, unthread the ring a few turns from
the camera face.
Image to infinity
Use a C-Mount compatible lens that allows an infinity focus. Set the lens to
infinity and image a distant object—10 to 15 m should suffice. Make sure the
lens is firmly threaded onto the C-Mount ring. Rotate the lens and C-Mount ring
until the image is focused. Carefully tighten the locking ring and recheck focus.
www
Prosilica GC cameras are shipped with adjustable C-Mount. The
camera can also be built with a CS-Mount with a standard 12.50
mm optical flange focal distance and a ± 10 µm tolerance.
See Modular Concept for more information:
http://www.alliedvision.com/fileadmin/content/documents/
products/cameras/various/modular-concept/
Modular_concept_external.pdf
Figure 32: Prosilica GC camera and locking wrench
Note
A wrench suitable for this procedure is available for purchase
from Allied Vision.
P/N: 02-5003A