Laser Safety

Laser Safety and Classification
The CrossCheck laser profile sensor uses a CDRH Class 3A or (IEC 3R) semiconductor laser emitting diode with 685nm visible light. The maximum emitting power is less than 5mW when a 7mm diameter aperture is positioned 100mm from the point the laser radiation exits the sensor.
3R sensors are compliant with standards relating to laser products specified in IEC 60825-1 and U.S. FDA CFR Title 21 Part 1040 except for deviations pursuant to Laser Notice No. 50.
The following table lists some key precautions and requirements for CDRH Class 3A (IEC 3R) according to the IEC 60825-1 Summary of User.

CDRH Class 3A (IEC 3R) Laser Safety Officer Not required for visible emission Remote Interlock Not required Key Control Not required Beam Attenuator Not required Emission Indicator Device Not required for visible emission Warning Signs Not required Beam Path Terminate at end of useful length Specular Reflection Prevent unintentional reflections Eye Protection No requirements Training Required for Operators/Maintenance

The following information is taken from the ANSI Z136.1 standard
Beam Path: Class 3R laser devices shall terminate or block the axis of the unobstructed laser radiation beam at the end of its useful length. A metal plate, roller, ground or riser on the machine frame can be used to block the beam.
Specular Reflection: a mirror like reflection. Reflection is the deviation of radiation following incidence on a surface. Diffusely reflected beams are generally safe, but should not be viewed longer than 10 seconds.
Training: if a certified LSO is not available, 3R training Videos & CDs are available for operators and maintenance personnel at the Laser Institute of America.

Example of Laser Class 3R Warning Labels

Warning! Regardless of laser class, “DO NOT stare into laser beam”.
Use caution, any modification or adjustment without manufacturer permission may result in hazardous radiation exposure.