Basic safety instructions
Chapter 1
MN025 / v2.1.0
3-Axis Subsystems for Laser Beam Deflection
7
1.4
Classification of laser devices
The subsystem 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 302.5nm to 4,000nm. The ac-
cessible laser radiation is not dangerous to the eyes, as long as the cross-section is not re-
duced by optical instruments (magnifying glasses, lenses, telescopes).
2
The accessible laser radiation is in the visible spectrum (400nm to 700nm). Short-term expo-
sure (up to 0.25s) is not dangerous to the eyes. Additional radiation components outside the
wavelength range from 400nm-700nm meet the requirements for class 1.
2M
The accessible laser radiation is in the visible spectrum from 400nm to 700nm. Short-term
exposure (up to 0.25s) is not dangerous to the eyes, as long as the cross-section is not re-
duced by optical instruments (magnifying glasses, lenses, telescopes). Additional radiation
components outside the wavelength range from 400nm-700nm meet the requirements for
class 1M.
3R
The accessible laser radiation is in a wavelength range of 302.5nm to 10,600nm and is dan-
gerous 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 400nm 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 subsystem changes the position at which the beam is emitted and
the new beam output must be marked with a warning sign showing the appropriate classifica-
tion.
Note:
The subsystem 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.
