Pike Technical Manual
V5.2.0
82
Camera dimensions
Adjustment of C-Mount
Pike 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: one on the top (middle) and one on the right 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.
Individual adjustment may be required:
•
if you cannot focus correctly at near or far distances or
•
if the back focal plane of your lens does not conform to the C-Mount back-
focus specification or
•
if you have e.g. removed the IR cut filter.
Do the following:
1.
Looking in front of the lens loosen both screws on the top (middle) and the
right side of the housing (locations as shown above by arrows) with an
Allen key (1.3 x 50; Order#: K 9020411). If one of this screws is not avail-
able (angled head models W90/W270 S90), use the screw on the other
side.
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.
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.
4.
Once focus is achieved, tighten the two locking screws without applying
excessive torque.
Figure 35: Back focus adjustment
loosen both screws on top and the right side of the camera
