EN 208 / Alignment Protection against Laser radiation
This norm refers to glasses for laser alignment. They will reduce the actual incident power to the power of a class II laser (< 1 mW for continuous wave lasers). Lasers denoted as class II are regarded as eye safe if the blink reflex is working normally. Alignment glasses allow the user to see the beam spot while aligning the laser.
This is only possible for visible lasers (according to this norm “visible lasers” are defined as being from 400nm to 700nm). Alignment glasses must also withstand a direct hit from the specified laser for at least 5 seconds (cw) or 50 pulses (pulsed mode) under standardised conditions.
Table of Alignment Protection Levels according to EN 208
RB-Protection Levels, max. Laser Power and max. Pulse Energy acc. to EN 207
