The endoscope comprises an elongate insertable part including an observing window in the tip part and a sucking tube path in the interior, an image forming optical system receiving a light from an object coming in from the observing window and forming an endoscope image, an imaging apparatus for imaging...http://www.google.fr/patents/US4979497?utm_source=gb-gplus-shareBrevet US4979497 - Endoscope
