12 December
Classification of lasers
Lasers are classified into different categories. This classification is carried out according to NEN-EN 60825-1:2014. This standard defines the criteria for the different laser categories. Below, we provide a summary of this classification.
Laser Class 1
This laser class does not pose a hazard. The laser operates exclusively in an enclosed environment. Personal protection is not required. No hazard under normal conditions.
Wavelength of the light:
302.5–4000 nm (visible and invisible)
Typical power:
40 µW
Personal protection:
Not required
Laser Class 1M
Lasers in this class are safe for the eye when exposed to direct laser light. The laser light may become hazardous when viewed or altered using optical instruments.
Wavelength of the light:
180 nm–1 mm (visible and invisible)
Typical power:
40 µW
Personal protection:
Not required under normal use.
Laser Class 2
These laser products generate visible light of limited intensity. If the laser light enters the eye, an automatic reflex will cause the eye to close.
Wavelength of the light:
400–700 nm (visible)
Typical power:
1 mW
Personal protection:
Not required under normal use.
Laserclass 2M
Not directly hazardous when exposed to direct light. However, this laser light can be hazardous when optical instruments are used. A hazard may occur when the light shines through an optical instrument such as a magnifying glass, binoculars, etc.
Wavelength of the light:
400 – 700 nm (visible)
Typical power:
1 mW
Personal protection:
Not required under normal use.
Laserklasse 3R
Not directly hazardous when exposed to direct light. However, this laser light can be hazardous when optical instruments are used. A hazard may occur when the light shines through an optical instrument such as a magnifying glass, binoculars, etc.
Wavelength of the light:
180 nm–1 mm (visible and invisible)
Typical power:
<500 mW
Personal protection:
Required
Laserclass 4
Class 4 lasers have a high power output. Both direct laser light and reflections contain a hazardous amount of energy that can be harmful to the eyes and skin. Direct laser light and its reflections can cause fire. More information about the risks can be found on our webpage about safety and laser welding.
Wavelength of the light:
180 nm–1 mm (visible and invisible)
Typical power:
No limit
Personal protection:
The use of safety glasses for laser light is mandatory.
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