Omron Z300 V3 - SETUP, Setup Manual, Page: 89 / 98

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7-2 Laser Product Classifications
EN/JIS
FDA/ANSI
Class Description
Class 1 Safe inherently by engineering design.
Class 2 Low power in the visible spectrum (wavelength: 400 to 710 nm); eye protection
normally afforded by aversion responses.
Class 3A Direct intrabeam viewing with optical aids may be hazardous.
Power of less than 5 mW max. for visible spectrum.
Less than five times the output of the Class 1 for wavelengths other than the
visible spectrum.
Class 3B Direct intrabeam viewing may be hazardous.
It is not hazardous to view the pulse laser radiation that does not focus due to
scattered reflection and the power that allows safe viewing under certain con-
ditions is less than 0.5 W.
Class 4 High power; diffused reflection may be hazardous and may lead to skin haz-
ards or fire.
Class FDA definition ANSI description
Class I/1
Limits applicable to devices that have
emissions in the ultraviolet, visible, and
infrared spectra, and limits below
which biological hazards have not
been established.
A Class 1 laser is considered to be
incapable of producing damaging radi-
ation levels during operation and main-
tenance and is, therefore, exempt from
any control measures or other forms of
surveillance.
Class IIa/2a Limits applicable to products whose
visible emission does not exceed
Class I limits for emission durations of
1,000 seconds or less and are not
intended for viewing.
Class 2 lasers are divided into two
subclasses, 2 and 2a. A Class 2 laser
emits in the visible portion of the spec-
trum (0.4 to 0.7 µm) and eye protection
is normally afforded by the aversion
response including the blink reflex.
Class II/2 Limits applicable to products that have
emissions in the visible spectrum (400
to 710 nm) for emission durations in
excess of 0.25 second, providing that
emissions for other durations and/or
wavelengths do not exceed the Class I
limits. Class II products are considered
hazardous for direct long-term ocular
exposure.
Class IIIa/3a Limits to products that have emissions
in the visible spectrum and that have
beams where the total collectable radi-
ant power does not exceed 5 milli-
watts.
Class 3 lasers are divided into two
subclasses, 3a and 3b. A Class 3 laser
may be hazardous under direct and
specular reflection viewing conditions,
but the diffuse reflection is usually not
a hazard.
Class IIIb/3b 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 spectrum. Class
IIIb emission levels are ocular hazards
for direct exposure throughout the
range of the Class, and skin hazards at
the higher levels of the Class.
Class IV/4
Exceeding the limits of Class IIIb and
are a hazard for scattered reflection as
well as for direct exposure.
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 fire hazard. Class 4
lasers may also produce laser-gener-
ated air contaminants and hazardous
plasma radiation.
Laser Product Classifications Section 7-2