HP-L-20.8 Scanner Manual V1.0.3
(27/11/2014)
16
S
YSTEM
U
SAGE
I
NFORMATION
C.
Standoff indicator laser
C.1
The measurement laser beam is emitted from the laser transmission window (section A.1).
The sensor is extremely light sensitive, therefore the measurement laser beam is typically hard to
see on the part.
A second laser beam, called the indicator laser, is emitted from the laser reception window (section
A.1). The indicator laser is brighter than the measurement laser and can be clearly seen on all but
the darkest of surfaces.
Fig. 2:
Near range (left) Ideal (centre) Far range (right)
In the event that the sensor is too close or too far from the object, the indicator laser beam will start
to flash. Also the measurement laser will become slightly brighter.
Curved Laser line
C.2
The HP-L technology is based on a laser spot being scanned left and right, from a point source.
Because of this the indicator laser can describe a curved line on the surface of the part.
This is perfectly normal and is not a malfunction of the system.
Looking at the figure below,
Φ is a fixed angle, therefore h1/a = h2/b. Since b > a then h2 > h1.
Fig. 3:
Curved indicator laser
h1
h2
a
b
ϕ
Indicator Laser
Main Laser
Summary of Contents for HP-L-20.8
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