A fundus camera which may maintain sufficient working distance to an eye to be examined, providing a first illumination optical system for illuminating an eye to be examined by using infrared light, a second illumination optical system for illuminating the eye to be examined by using visible light for...http://www.google.de/patents/US5668621?utm_source=gb-gplus-sharePatent US5668621 - Hand-held fundus camera with shared light path
