Real time health monitoring and life
Laser diode current, temperature and
Setting of modulation logic and slope
Power setting from 10% to 100% of the
Temperature Cut off setting
RS-485 mode for paring up to 32 lasers
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The higher geometric complexity of this configuration
also makes it more difficult to process results, making it
most compatible with objects that have simple contours.
In addition, the oblique camera angle produces some occlusion.
The look-away geometry configuration places both the
camera and laser projector on the same side of the nor-
mal to the object surface. This dramatically reduces the
chance of specular reflections, unless the object is highly
textured. It works best with highly reflective objects.
This configuration also substantially reduces height resolution because the camera and laser line projector points
of view are so similar. Additionally, there is some occlusion.
Achieving optimum performance from a machine vi-
sion system based on laser line projection requires under-
standing the trade-offs inherent in the various possible
system configurations. It’s best to work with a vendor
knowledgeable in the nuances of laser triangulation in
order to ensure that system results meet expectations.
Meet the author
Dan Callen is the senior product manager for OBIS LX and
Stingray Lasers at Coherent Inc.; email: daniel.callen@
L ASERD EBRISS HIELDS
Figure 2. Four common configurations for machine vision systems based on 3D triangulation.