Definitions Of Laser Classification - Omron ZFV-C Manual

Definitions of Laser Classification

■ For Europe
Laser Product Classifications
EN
Class
Class 1 Lasers which are safe under reasonably foreseeable conditions of operation.
Class 2 Lasers emitting visible radiation in the wavelength range from 400 nm to 700 nm. Eye pro-
tection is normally afforded by aversion responses including the blink reflex.
Class 3A Lasers which are safe for viewing with the unaided eye. For laser emitting in the wave-
length range from 400 nm to 700 nm, protection is afforded by aversion responses includ-
ing the blink reflex. For other wavelengths the hazard to the unaided eye is no greater than
for Class 1. Direct intrabeam viewing of Class 3A lasers with optical aides (e.g., binoculars,
telescopes, microscopes) may be hazardous.
Class 3B Direct intrabeam viewing of these lasers is always hazardous. Viewing diffuse reflections is
normally safe (see note).
Class 4 Lasers which are also capable of producing hazardous diffuse reflections. They may cause
skin injuries and could also constitute a fire hazard. Their use requires extreme caution.
Note: Conditions for safe viewing of diffuse reflections for Class 3B visible lasers are: minimum viewing distance of
13 cm between screen and cornea and a maximum viewing time of 10 s. Other viewing conditions require a
comparison of the diffuse reflection exposure with the MPE.
Requirements from Regulations and Standards
Description
Section 6
ZFV-C
139
User's Manual