Omron FQ-CR1 User Manual page 194

Definitions of Laser Classification
For Europe
Laser Product Classifications
EN
Class
Class 1
Class 1M
Class 2
Class 2M
Class 3R
Class 3B
Class 4
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.
192
Requirements from Regulations and Standards
Laser that are safe under reasonably foreseeable conditions of operation, including the use
of optical instruments for intrabeam viewing.
Laser emitting in the wavelength range from 302.5 nm to 4000 nm which are safe under
reasonably foreseeable conditions of operation, but may be hazardous if the user employs
optics within the beam.
Laser that emit visible radiation in the wavelength range from 400 nm to 700 nm where eye
protection is normally afforded by aversion responses, including the blink reflex. This reac-
tion may be expected to provide adequate protection under reasonably foreseeable condi-
tions of operation including the use of optical instruments for intrabeam viewing.
Laser that emit visible radiation in the wavelength range from 400 nm to 700 nm where eye
protection is normally afforded by aversion responses, including the blink reflex. However,
viewing of the output may be more hazardous if the user employs optics within the beam.
Laser that emit in the wavelength range from 302.5 nm to 10
viewing is potentially hazardous but the risk is lower than for Class 3B lasers, and fewer
manufacturing requirements and control measures for the user apply than for Class 3B
lasers. The accessible emission limit is within five times the AEL of Class 2 in the wave-
length range from 400 nm to 700 nm and within five times the AEL of Class 1 for other
wavelengths.
Lasers that are normally hazardous when direct intrabeam exposure occurs (i.e. within the
NOHD). Viewing diffuse reflections is normally safe (see also note).
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.
Description
6
nm where direct intrabeam
FQ User's Manual