Dalsa Piranha XL XDR PX-HM-16K06X-00-R Manual page 72

A mechanical means to adjust this angle may need to be incorporated into the camera mount. This
becomes a finer, more precise adjustment as the magnification increases, especially above 1x, as
the depth of field becomes progressively smaller. The two examples below demonstrate this
characteristic.
Assume the use of a 120 mm lens set at f5.6 and Circle of Confusion = 2 pixels.
Example A: Magnification of 0.5X
Depth of Field = 1.34mm
Field of View = 16352 x 10um = 163.52mm
Requires the camera optical axis to be within +/-0.94° from perpendicular
Example B: Magnification of 2X
Depth of Field = 0.042mm
Field of View = 16352 x 2.5um = 40.88mm
Requires the camera optical axis to be within +/-0.12° from perpendicular
70 •
Worse Worse
Focus Focus
Good Good
Focus Focus
Figure 23 Effects of Camera Tilt In the Long Sensor Axis
Worse
Worse
Focus
Focus
Good
Focus
The Piranha XL XDR Camera