Additional requirements on high quality protection laser safety filters
According to the EN standard for personal protection the Optical Density as the sole criteria for determining the safety of a laser filter is not sufficient. Also important is the fact that the Optical Density should be guaranteed throughout a direct hit. Frame and filter must withstand the laser beam which they were selected for over a period of
time, this is 5 seconds (continuous mode) or 50 pulses (pulsed mode) and must maintain the specified protection level under certain accurately defined conditions, as required by EN 207/208. Filters and frame must fulfil the following requirements:
