A condenser for a transmitted light microscope with built-in 3-D filters and stereo pair photo apertures that permit a standard 2-D microscope, high power as well as low power, to produce a variety of high quality 3-D images and photos. ...http://www.google.ca/patents/US5706128?utm_source=gb-gplus-sharePatent US5706128 - Stereo microscope condenser
