VUX-240 Laser Safety

The RIEGL VUX-240 is a Class 3R laser product which means it emits radiation that can exceed the MPE or Maximum Permissible Exposure. The VUX-240 only emits radiation when in scanning operation. Please follow the guidelines below to ensure safe use.

It is recommended that the laser not be fired unless it is flying beyond the ENOHD (2.5 m) of anywhere a person could be.

Maximum Permissible Exposure (MPE): the level of laser exposure to which the eye may be exposed without adverse affects. The highest laser power considered safe for the eyes.

Nominal Ocular Hazard Distance (NOHD): the distance from the output aperture at which the beam irrandiance or radiant exposure equals the appropriate corneal maximum permissible exposure (MPE). The danger area for observers with or without optical aids.

Extended Nominal Ocular Hazard Distance (ENOHD): the NOHD including the additional possibility of viewing through optical aids. Note that the observation of the laser beam with an optical instrument is more hazardous than observation of the beam with the naked eye.




0.3 m


2.5 m

Bench Testing

Users should be aware of reflection hazards if bench testing the laser scanner. Exposure to specular reflections, or reflections from a smooth or mirrored surface, can be as dangerous as intrabeam viewing. Eliminate all reflective material from the vicinity of the beam paths. Intrabeam exposure is defined as direct, full exposure to the irradiance of the beam. Diffuse reflections from a non-uniform or rough surface can also be dangerous, although they do not carry the full power of an intrabeam exposure.


Direct intrabeam viewing is potentially hazardous from distances below the ENOHD. Never look into the beam exiting aperature from distances below the ENOHD.

Never point the Riegl VUX-240 directly at people's eyes within the distances below the ENOHD.

Disassembling the instrument, removing cover parts as well as any manipulation of the laser beam path can cause increased laser hazards. Never operate an instrument which is obviously damaged or modified or not fully assembled.