Patent ID: 6902278

Claim:
A drape assembly for maintaining a sterile field around a surgical microscope having at least one ocular port defining a pair of viewing axes, an illumination source defining an illumination axis, and an objective lens barrel having an inner peripheral wall defining a cavity, the assembly comprising: an elongated hollow enclosure of sheet-form material having a first end defining an access opening and a second end defining a hole; a cylindrical frame defining a central axis and located on the enclosure second end, the cylindrical frame having an outer surface engageable with the inner peripheral wall of the objective lens barrel for mounting the frame on the barrel, the frame including a window support adapted to be located within the cavity when the outer surface engages the inner peripheral wall; and a window located on the window support such that the window intersects the viewing axes when the frame is mounted on the barrel, the frame and window sealing the hole in the enclosure.