A light microscope with lenses projecting the rear aperture of an objective lens at a location remote from the objective lens enhancing high power stereoscopic viewing and photographing with a binocular (two eyepiece) viewing system and when combined with an iris in close proximity to the projected image...http://www.google.ca/patents/US5539572?utm_source=gb-gplus-sharePatent US5539572 - Microscope illumination and stereo viewing
