EN 60825 Laserprotection based on the Optical Density
This norm requires that laser safety eyewear provides sufficient optical density to reduce the power of a given laser to equal to or less than the listed Maximum Permissible Exposure levels (MPE). It allows specification according to optical densities in extreme situations, but recommends the use of EN 207 with a third party laser test.
In neither standard is a nominal hazard zone allowed, the only acceptance is protection against the worst-case i.e. direct laser radiation.
If there is no filter available that fulfils your requirements according to EN 207, LASERVISION will quote according to EN 60825 with a filter that comes as close as possible to the requirements of EN 207. This means that the Optical Density is always correct, but the stability time of 5 seconds/50 pulses cannot be guaranteed.
For such an exceptional case it is recommended for the laser saftey officer or saftey engineer to contact the responsible Employer’s Liability Insurance Association in order to discuss the application in detail.
