Stereo endoscope for inserting into body cavities

Claim 1

An endoscope for stereoscopic viewing within body cavities having, in combination, a longitudinally extending hollow barrel containing a pair of side-by-side longitudinally coextending hollow tubular scopes each defining an unfilled hollow tubular space of length substantially the same as the barrel and containing only optical lens means, a coextensive externally illuminated fiber optic cable and a coextensive suction tube, each disposed adjacent but externally of the hollow tubular scopes within the barrel and extending the length of the barrel, and the terminal end of which barrel is adapted for insertion into a body cavity with the illumination carried by the fiber optic cable illuminating the same to reflect light back along the hollow space of each of the tubular scopes,..and the suction tube aspirating the cavity; means for connecting the proximal end of the barrel to a viewing housing containing a pair of eyepieces for left and right eye viewing; and an optical system within the housing comprising a central prismatic mirror means for directing the light reflected back along the pair of tubular scopes laterally to the left and to the right sides and respective prism means associated with the respective left and right eye pieces for directing the reflected light thereto and to enable stereoscopic viewing of the illuminated cavity, and in which means is provided for adjusting each of the mirror and prism means, the mirror means forwardly and backwardly along the axis of the barrel, and the prism means laterally of the housing and eyepieces.