Omron L User Manual page 180

Class
Limits to products that have emissions in the
visible spectrum and that have beams
Class IIIa/3a
where the total collectable radiant power
does not exceed 5 milliwatts.
Limits applicable to devices that emit in the
ultraviolet, visible, and infrared spectra.
Class IIIb products include laser systems
ranging from 5 to 500 milliwatts in the visible
Class IIIb/3b spectrum. Class IIIb emission levels are
ocular hazards for direct exposure through-
out the range of the Class, and skin hazards
at the higher levels of the Class.
Exceeding the limits of Class IIIb and are a
Class IV/4 hazard for scattered reflection as well as for
direct exposure.
FDA definition ANSI description
Class 3 lasers are divided into two sub-
classes, 3a and 3b. A Class 3 laser may be
hazardous under direct and specular reflec-
tion viewing conditions, but the diffuse
reflection is usually not a hazard.
A Class 4 laser is a hazard to the eye or skin
from the direct beam and sometimes from a
diffuse reflection and also can be a fire haz-
ard. Class 4 lasers may also produce laser-
generated air contaminants and hazardous
plasma radiation.
Section 7
ZX-L-N
163
User's Manual