JAI IIT Camera Systems VIS-CAM 400 - Manual (Page 35)

Appendix A 35
IIT Camera System Manual
6 Appendix B: Focus Adjustment of Kowa 35mm
The following describes the adjustment of the 35mm Kowa lens for best day/night performance
using IIT IR Illuminator for night illumination.
1) Disconnect IR Illuminator from IIT IO Board connector X11:
Figure 32. IR Illuminator connector
2) Start EN Setup and select repetitive trigger. Manually adjust the shutter and gain to useable
image.
3) Adjust the focus on the lens to near position :
Figure 33. Kowa 35mm lens
4) Slowly adjust the focus ring from near to far for the best picture. If the best focus position is
passed, adjust back to near and adjust towards far position again.
5) When the best position is found, secure the focus locking screw on the lens and reconnect the IR
Illuminator. Verify that the license plate focus is acceptable. The best way to check this is by
mounting an 850nm band pass filter in front of the lens.
(The license plate in the picture can be zoomed-in in the EN Setup application by holding down the
“Alt” key while dragging a box around the license plate using the mouse. The zoom mode is left by
holding down the “Alt” key and clicking anywhere in the picture)