Allied International V2.4.0 Benutzerhandbuch
Camera dimensions
OSCAR Technical Manual V2.4.0
34
Adjustment of C-Mount
Oscar cameras allow the precise adjustment of the back focus of the C-Mount
by means of a back focus ring which is threaded into the C-Mount and held
by two screws on either side of the camera. The mechanical adjustment of
the imaging device is important in order to achieve a perfect alignment with
the focal point of the lens.
by means of a back focus ring which is threaded into the C-Mount and held
by two screws on either side of the camera. The mechanical adjustment of
the imaging device is important in order to achieve a perfect alignment with
the focal point of the lens.
This adjustment is made before leaving the factory to conform to the stan-
dard of 17.526 mm and should normally not require adjustment in the field.
dard of 17.526 mm and should normally not require adjustment in the field.
However, if the back focal plane of your lens does not conform to the C-
Mount back-focus specification, renewed adjustment may be required in the
field.
Mount back-focus specification, renewed adjustment may be required in the
field.
How to proceed:
1.
Loosen screws (location as shown above by arrow) with an Allen key
(1.3 x 50; Order#: K 9020411).
(1.3 x 50; Order#: K 9020411).
2.
With the lens set to infinity or a known focus distance, set the camera
to view an object located at 'infinity' or the known distance.
to view an object located at 'infinity' or the known distance.
3.
Rotate the C-Mount ring and lens forward or backwards on its thread
until the object is in sharp focus. Be careful that the lens remains
seated in the C-Mount.
until the object is in sharp focus. Be careful that the lens remains
seated in the C-Mount.
4.
Once focus is achieved, tighten the two locking screws without applying
excessive torque.
excessive torque.
Figure 10: Back focus adjustment