1
Laser Safety
xv
Use Precautions
EN60825-1
Require-
ments;
Classification
ments;
Sub-clause
Class 1
Class 2
Class 3A
Class 3B*
Class 4
Remote in-
terlock
Not required
Connect to room or door
circuits
Key control
Not required
Remove key when not in
use
Beam atten-
uator
Not required
When in use prevents inad-
vertent exposure
Emission in-
dicator de-
vice
Not required
Indicates laser is energized
Warning
signs
Not required
Follow precautions on
warning signs
Beam path
Not required
Terminate beam at end of useful length
Specular re-
flection
No requirements
Prevent unintentional re-
flections
Eye protec-
tion
No requirements
Required if engineering and administrative
procedures not practicable and MPE ex-
ceeded
Protective
clothing
No requirements
Sometimes
required
Specific re-
quirements
Training
No requirements
Required for all operator and maintenance
personnel
* With respect to the requirements of remote interlock connector, key control, beam attenua-
tor, and emission indicator, Class 3B laser products not exceeding five times the AEL of
Class 2 in the wavelength range of 400 nm to 700 nm are to be treated as Class 3A laser
products.
Note:
This table is intended to provide a convenient summary of requirements. See text of
this standard for complete precautions.