Protective Viewing Windows
All viewing portals, optics, windows or display screens included as a part
of the laser or laser installation shall incorporate some means to attenuate the
laser radiation transmitted through the windows to levels below the appropriate
MPE levels. This would include, for example, a "viewing window" into the laser
facility. The filtration requirements would be based upon the level of laser radiation
that would occur at the window in a typical "worst case" condition in a manner
identical to the eyewear evaluation.