Classification Of Laser Devices - RAYLASE SUPERSCAN II Manual

Basic safety instructions
1.4

Classification of laser devices

The deflection unit can be fitted on various laser devices. Every laser device is assigned to a
particular danger class, which must be specified at the point where laser radiation is emitted,
e.g. using a warning sign. The following classifications are defined in DIN EN 60825-1:
Class Description
1 The accessible laser radiation is not dangerous under reasonable foreseeable conditions.
1M The accessible laser radiation is in the wavelength range of 302.5 to 4,000nm. The accessi-
ble laser radiation is not dangerous to the eyes, as long as the cross-section is not reduced
by optical instruments (magnifying glasses, lenses, telescopes).
2 The accessible laser radiation is in the visible spectrum (400 to 700nm). Short-term exposure
(up to 0.25s) is not dangerous to the eyes. Additional radiation components outside the
wavelength range from 400-700 nm meet the requirements for class 1.
2M The accessible laser radiation is in the visible spectrum from 400 to 700nm. Short-term expo-
sure (up to 0.25s) is not dangerous to the eyes, as long as the cross-section is not reduced
by optical instruments (magnifying glasses, lenses, telescopes). Additional radiation compo-
nents outside the wavelength range from 400-700nm meet the requirements for class 1M.
3R The accessible laser radiation is in a wavelength range of 302.5 to 10,600nm and is danger-
ous to the eyes. The power or energy is a maximum of five times the limit for permissible
class 2 radiation in the wavelength range from 400 to 700nm.
3B The accessible laser radiation is dangerous to the eyes and frequently to the skin.
4 The accessible laser radiation is extremely dangerous to the eyes and dangerous to the skin.
Even diffuse scattered radiation can be dangerous. The laser radiation can cause fires or a
risk of explosion.
Note: Bear in mind that the deflection unit changes the position at which the beam is emitted
and the new beam output must be marked with a warning sign showing the appropriate classi-
fication.
Note: The deflection unit can change the classification of the laser device, particularly if it is
fitted with a focusing lens. The laser device may require additional protective equipment as a
result.
MN065_v1.0.1
Lenses for CO2 laser deflection units with linear translator
modules are made of zinc selenide. The rating plate indicates if
this applies to the present deflection unit ( page 13, Detailed
Description). In addition, these deflection units are provided
with the adjacent sign.
Also note  page 7, Special hazards caused by lenses made
of zinc selenide.
2-Axis Laser Beam Deflection Unit SS-II
Chapter 1
5