Provided is an imaging device, wherein the imaging device includes: light source, a collecting device and a processing device; wherein the light source is used to emit preset multi-path narrowband light; the multi-path narrowband light is used to form white light and narrowband characteristic light, and as fluorescent excitation light; the collecting device is used to collect multi-path reflected light to obtain multi-path reflected light data, and collect fluorescence to obtain fluorescence data; the multi-path reflected light is: light forming white light and narrow-band characteristic light in the multi-path narrowband light that is reflected by the tissue to be diagnosed; the fluorescence is: the spontaneous fluorescence of the tissue to be diagnosed after the narrowband light as the fluorescent excitation light in the multi-path narrowband light excites the tissue to be diagnosed; the processing device is used to form white light image and characteristic light image of the tissue to be diagnosed according to the multi-path reflected light data, and form fluorescent image of the tissue to be diagnosed according to the multi-path reflected light data and the fluorescence data. White light image, characteristic light image, and fluorescent image can be generated by the imaging device of the present invention.La présente invention concerne un dispositif d'imagerie, le dispositif d'imagerie comprenant : une source de lumière, un dispositif de collecte et un dispositif de traitement ; la source de lumière étant utilisée pour émettre de la lumière à bande étroite en trajets multiples prédéfinis ; la lumière à bande étroite en trajets multiples étant utilisée pour former de la lumière blanche et de la lumière caractéristique à bande étroite, et comme lumière d'excitation fluorescente ; le dispositif de collecte est utilisé pour collecter la lumière reflétée en trajets multiples pour obtenir des données de lumière reflétée en trajets multiples, et collecter la fluoresce