EN 207

Any laser eye protection sold within the European Community must be certified and labeled with the CE mark.

More precisely, the safety glasses should be able to withstand a continuous wave laser for 5 seconds, or 50 pulses for a pulsed laser (EN 207:2017).

Finally, the scale number LB6 indicates a lower limit for the optical density, i.e. the transmittance within this wavelength range is less than 10−6.

EN 207 specifies four laser working modes: The scale numbers range from LB1 to LB10, where the number is a lower limit for the optical density, i.e. LBn means that OD > n, or

The minimum scale number for a given laser with a beam diameter of 1 mm depends on the working mode and the wavelength as follows (EN 207:2017): If the beam diameter differs from 1 mm a correction factor, depending on the material of the filter and frame, must be applied.