User`s manual

AW00049313000 Spatial Correction on Color Cameras
Basler runner 143
9.3.1 System Design Calculations
Assuming that the camera operating requirements and the system design requirements mentioned
earlier in this chapter are met, the formulas below can be used to calculate the basic design criteria
for your system.
Magnification
where:  = magnification
n = number of line acquisitions needed to move the image from sensor line to sensor line
(see Table 10)
y = distance the conveyor moves per line acquisition
Line of View
where: L = length of the line of view of each sensor line
Aspect Ratio
The aspect ratio of your acquired images is determined by the value of “n” in the magnification
equation. The value can be set from 1 to 15. If the value is set to 8, the aspect ratio of the acquired
images will be 1 to 1. The aspect ratios for various values of “n” are listed in Table 10. The aspect
ratios in the table are width to height where width is in the direction of conveyor travel and height is
along the axis of the sensor lines.
Once the magnification has been determined, you can select a lens with the appropriate focal length
and determine the correct distance between the camera and the conveyor.
If you have questions about lens selection, please contact Basler technical support for assistance.
Technical support contact information is located in the front pages of this manual.
n Ratio n Ratio n Ratio n Ratio
1 1/8 5 5/8 9 9/8 13 13/8
21/4 63/4 105/4 147/4
3 3/8 7 7/8 11 11/8 15 15/8
41/2 81/1 123/2
Table 10:
Aspect Ratios for Values of n

112 µm
n y
--------------------=
L 29.372 mm
1

---
=