Operating principle
Leuze electronic
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Operating principle
3.1
Generation of 2D profiles
Light section sensors work according to the triangulation principle. Using transmission
optics a laser beam is expanded to a line and aimed at an object. The light remitted by the
object is received by a camera, which consists of receiver optics and the CMOS area
detector.
Figure 3.1:
Light section sensor design
Depending on the distance of the object the laser line is projected to a different position on
the CMOS planar detector as shown in Figure 3.1. By means of this position the distance
of the object can be calculated.
+X
-X
Z
-Y
CMOS area
detector
Receiving optics
Laser with expansion optics
The zero point of the coordi-
nate system is the intersection
of optical axis and front edge of
the housing.
