A system for detecting cancerous or precancerous lesions directs light produced from a mercury arc lamp into an illumination guide of an endoscope. Autofluorescence light produced by the tissue under examination is divided into red and green spectral bands by a dichroic mirror. Light in the red and green...http://www.google.de/patents/US5647368?utm_source=gb-gplus-sharePatent US5647368 - Imaging system for detecting diseased tissue using native fluorsecence in the gastrointestinal and respiratory tract
