Fluorescence endoscope with inserted/retracted short-pass filter

A fluorescence endoscope (E) to view human organs exhibiting zones (F) marked by fluorescence, comprising a light conduit (LC) used for illumination and of which the proximal end is illuminated from a lamp (L) emitting white light passing through a short pass filter (SP) which may be controlled by a timer (T) to be moved into the beam path, further comprising a video camera system (C) viewing the image through a stationary long pass filter (LP), further a video-processing unit (RS2, FP, NP, SU) connected in series with the video camera system and controlled by the timer (T) and timed to generate time-separate normal and fluorescence images,

• characterized in that
• the video camera system comprises a video camera (C), the frame frequency of which is synchronized with the timer, where the video processing unit (RS2, FP, NP, SU) separately processes and prepares the fluorescence images taken when the short pass filter (SP) is inserted and the normal images taken when the short pass filter is retracted and then displays said fluorescence and normal images in congruent superposition on a display (M).