Anti-laser optical filter assembly

Claim 1

Optical mechanism for removing dangerous laser energy wavelengths from a visible incident beam, while transmitting other non-damaging wavelengths in the beam to the human eye or other photosensitive target: said optical mechanism comprising first Fabry-Perot filter means arranged to receive an incident visible beam containing the dangerous laser energy wavelengths and the non-dangerous wavelengths; said first Fabry-Perot filter means being operable to produce a first reflected ray containing primarily non-damaging wavelengths and some damaging wavelengths, and a first transmitted ray containing primarily dangerous wavelengths; first light absorption means operable to intercept the first transmitted ray to absorb the dangerous wavelengths contained therein; second Fabry-Perot filter means arranged to receive the reflected ray from the first filter means; said second Fabry-Perot filter means being operable to produce a second reflected ray containing essentially only non-damaging wavelengths, and a second transmitted ray containing dangerous wavelengths; second light absorption means operable to intercept the second transmitted ray to absorb the dangerous wavelengths contained therein; and means for directing the second reflected ray to the human eye or other photosensitive target.