Laser Safety
iii
Requirements from Regulations and Standards
EN60825-1 “Safety of Laser Products, Equipment
Classification, Requirements and User’s Guide”
• Summary of Manufacturer’s Requirements
*With respect to the requirements of remote interlock connector, key con-
trol, emission warning and attenuator, Class 3B laser products not exceed-
ing 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.
Requirements;
Sub-clause
Classification
Class 1
Class 2
Class 3A
Class 3B*
Class 4
Description of
hazard class
Safe under
reasonably
foreseeable
conditions
Low power;
eye protection
normally af-
forded by aver-
sion responses
Same as Class
2. Direct intra-
beam viewing
with optical
aids may be
hazardous
Direct intra-
beam viewing
may be hazard-
ous
High power; dif-
fused reflection
may be hazard-
ous
Protective
housing
Required for each laser product; limits access necessary for performance of functions
of the products
Safety interlock
in protective
housing
Designed to prevent removal of the panel until accessible emission values are below
the AEL (see note 2) for the class assigned
Remote control
Not required
Permits easy addition of external
interlock in laser installation
Key control
Not required
Laser inoperative when key is re-
moved
Emission warn-
ing device
Not required
Gives audible or visible warning
when laser is switched on or if ca-
pacitor bank of pulsed laser is be-
ing charged
Attenuator
Not required
Gives means beside ON/OFF
switch to temporarily block beam
Location con-
trols
Not required
Controls so located that there is no danger of expo-
sure to AEL above Classes 1 or 2 when adjust-
ments are made.
Viewing optics
Emission from all viewing systems must be below Class 1 AEL’s as applicable
Scanning
Scan failure shall not cause product to exceed its classification
Class label
Required
wording
Figures A and B and specified wording
Aperture label
Not required
Specified wording required
Service entry la-
bel
Required as appropriate to the class of accessible radiation
Override inter-
lock label
Required under certain conditions as appropriate to the class of laser used
User informa-
tion
Operation manuals must contain instructions for safe use
Purchasing and
service informa-
tion
Promotion brochures must reproduce classification labels; service manuals must con-
tain safety information
Medical prod-
ucts
Special calibration instructions required
Special calibration instructions,
means for measurement and tar-
get-indicator required
Fibre optic
Cable service connections require tool to disconnect if disconnection breaks protective
housing and permits access above Class 1
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