SICK Ranger E

Chapter 3 Reference Manual
Ranger E/D
22 ©SICK AG • Advanced Industrial Sensors • www.sick.com • All rights reserved
Mounting Rangers and Lightings
3.1.3 Main Geometries
There are four main principles for mounting the camera and the laser:
Ordinary The Ranger is mounted right above the object – perpendicular to the
direction of movement – and the laser is illuminating the object from
the side.
This geometry gives the highest resolution when measuring range, but
also results in miss-register – that is, a high range value in a profile
corresponds to a different y coordinate than a low range value.
Reversed ordinary As the Ordinary setup, but the placement of the laser and the Ranger
has been switched so that the lighting is placed above the object.
When measuring range, the reversed ordinary geometry does not
result in miss-register, but gives slightly lower resolution than the ordi-
nary geometry.
Specular The Ranger and the lighting are mounted on opposite sides of the
normal.
Specular geometries are useful for measuring dark or matte objects,
since it is requires less light than the other geometries.
Look-away The Ranger and the lighting are mounted on the same side of the
normal.
This geometry can be useful for avoiding unwanted reflexes but re-
quires more light than the other methods and gives lower resolution.
Figure 3.6 – Main geometries for mounting the Ranger and laser.
Ordinary Reversed ordinary
Specula
r
Loo
k
-away
β
α
β
α
α
β