HP-L-20.8 Scanner Manual V1.0.3
(27/11/2014)
10
Operating Principle
A.2
The sensor operates by scanned laser triangulation. An incident laser beam is projected on the
object and the reflection detected on a CCD. The location of the reflection is proportional to the
distance to the object. An independent optical circuit monitors the reflected signal and - in real time
–
adjusts the laser power accordingly. By use of a motorised scanning axis the beam measures a
surface profile.
Near
Middle
Far
Laser
Object lens
CCD
Laser triangulation
Point laser projector
Linear imager
Scanning
motor
Laser power
control
Photodiode
Summary of Contents for HP-L-20.8
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