C5 Series User Manual Rev. 1.4
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C5 Series Operational Reference
Measuring Principle
The C5 sensor acquires height profiles and height images based on the laser triangulation
principle. According to this method a laser line is projected on the object from one
direction. The C5 sensor views the object from another angle defining the triangulation
geometry. The resulting sensor image is evaluated by the C5 processing unit and
converted into a single height profile. By scanning the laser line over the object a
complete height image can be acquired.
The figures below demonstrate some typical triangulation geometries. The following
notation is used in the approximation of height resolution:
ΔX= resolution along the laser line (lateral),
ΔY= resolution perpendicular to the laser line (longitudinal in the direction of motion),
ΔZ= height resolution.
Geometry 1
The laser line is projected perpendicular to the object surface, while the camera views
the object under the triangulation angle α.
The height resolution can be approximated: ΔZ ≈ ΔX / sin(α)
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