A fluorescent imaging device to prevent the breakdown of a fluorescent image high-sensitivity imaging apparatus has a light source for endoscope use which selectively switches between an excitation light and a white light. This introduces a light into a light guide of an endoscope and such light is emitted...http://www.google.co.uk/patents/US6422994?utm_source=gb-gplus-sharePatent US6422994 - Fluorescent diagnostic system and method providing color discrimination enhancement
