Patent ID: 6669339
Filing Date: 2003-12-30
Classification: A61B

Abstract:
A fundus camera for photographing a fundus of an eye to be examined, the camera comprising:an illumination optical system for illuminating the fundus of the eye with visible illumination light for photographing and with invisible illumination light for observation; a photographing optical system including a first photographic element having a sensitivity to a visible wavelength range, for photographing an image of the fundus with visible reflection light from the fundus; an observation optical system including a first wavelength-selecting mirror having a wavelength-selecting property of reflecting approximately all of an invisible wavelength range and a small part of the visible wavelength range and transmitting a large part of the visible wavelength range, disposed on a first optical path of the photographing optical system, and a second photographic element having a sensitivity to the invisible wavelength range, disposed on a second optical path divided from the first optical path by the first wavelength-selecting mirror, for photographing an image of the fundus with invisible reflection light from the fundus; and a fixation target projection optical system including a fixation light source for emitting visible fixation target light, disposed on a third optical path divided from the second optical path by a light-dividing member, wherein the visible fixation target light is reflected by the first wavelength-selecting mirror and is delivered to the eye.