Fluorescence endoscope

摘要

A fluorescence endoscope includes an illuminating light projecting system which projects illuminating light onto a part inside a body, a first objective optical system which causes the illuminating light reflected at the part of the body to form a normal image of the part, an excitation light projecting system which projects onto a part inside the body excitation light, and a second objective optical system which causes fluorescence emitted from the part to form a fluorescence image. A normal image CCD takes the image formed by the objective optical system and outputs a normal image signal representing the normal image and a fluorescence image CCD takes the fluorescence image formed by the second objective optical system and outputs a fluorescence image signal representing the fluorescence image. A measuring light projecting system projects measuring light at a wavelength in the wavelength range of the fluorescence onto a part inside the body. Measurement images are formed through the first and second objective optical systems by the measuring light reflected at the same part of the body and an image degradation function of the second objective optical system is obtained on the basis of the image signals. An image restoration processing is carried out on a fluorescence image signal on the basis of the image degradation function.