Patent ID: 8690758

Claim:
A fluorescent endoscope apparatus comprising: an excitation light irradiation system configured to irradiate an observation area of a living body with excitation light for exciting plural kinds of fluorescent agents that exist in the observation area; a wavelength-selective transmission member which selects and transmits light in predetermined wavelength regions out of incident light coming from the observation area of the living body; a photodetector which photoelectrically converts the light that has been selected and transmitted by the wavelength-selective transmission member; a wavelength selection control section which controls the wavelength-selective transmission member, to cause the wavelength-selective transmission member select and transmit light in fluorescence detection wavelength regions that correspond to plural kinds of florescence emitted from the plural kinds of fluorescent agents respectively and light in spectrum acquisition wavelength regions that serially adjoin each other at a predetermined wavelength width in a predetermined wavelength range that includes a fluorescence detection wavelength region corresponding to at least one kind of fluorescence in the plural kinds of fluorescence; a fluorescence image synthesizer which synthesizes images of the light that has been selected and transmitted by the wavelength-selective transmission member and photoelectrically converted by the photodetector, in the fluorescence detection wavelength regions, to generate a synthesized image; an image display device which displays at least the synthesized image generated by the fluorescence image synthesizer; an intensity distribution acquisition section which acquires a peak wavelength region in an intensity distribution of light in the predetermined wavelength range by use of images of the light that has been selected and transmitted by the wavelength-selective transmission member and photoelectrically converted by the photodetector, in the respective spectrum acquisition wavelength regions in the predetermined wavelength range; and a wavelength selection control adjusting section which adjusts control by the wavelength selection control section over the wavelength-selective transmission member regarding selection and transmission of fluorescence detection wavelength regions, in such a way that, when the peak wavelength region acquired by the intensity distribution acquisition section does not coincide with a fluorescence detection wavelength region that is selected to be transmitted by the wavelength-selective transmission member and that corresponds to the at least one kind of fluorescence, the fluorescence detection wavelength region is shifted to the peak wavelength region.