Protective cover for maintaining an environment free of contaminant, system for transmitting a light beam not distorted visìvel along a predetermined direction, and,Process for the transmission not di

摘要

"Protective cover to maintain an environment free of contaminant, system for transmitting a light beam not distorted visu00ecvel along a predetermined direction, and,Process for the transmission not diverted from a beam of light through an optically transparent window visu00ecvel along a predetermined direction.A sterile curtain (10) serving to preserve the integrity of the sterile surgical field is described.The curtain (10) has an optically transparent window and rigid (14) which allows a visible light beam such as a laser beam.Get a targeting device without refraction or distortion that could result in misalignment of the beam of visible light with respect to an object target.The optically transparent window and rigid (14) is made of a material having a capacity of light transmission.Whose capacity remains substantially unchanged after the curtain undergoes a process of sterilization by gamma radiation.