Patent ID: 7431456
Filing Date: 2008-10-07
Classification: A61B

Abstract:
1. A fundus camera having a photographing optical system for photographing a fundus of an eye to be examined, the camera comprising: a first illumination optical system for illuminating the fundus of the eye with an infrared light; a second illumination optical system for illuminating the fundus of the eye with a visible light used for photography and which shares a part of an optical path with said first illuminating optical system; a target plate for focusing disposed within the optical path shared by said first illumination optical system and said second illumination optical system, of which a target is formed by a filter having such wavelength characteristics that it transmits a visible area and intercepts an infrared area; an observation optical system provided with a photographic element having sensitivity within the infrared area, for observing the fundus of the eye which is illuminated by the infrared light of said first illumination optical system and a target image of said target plate which is projected onto the fundus of the eye; displaying means for displaying an image obtained by said observational optical system; and moving means for moving said target plate on an optical axis by interlocking with a movement of a focusing lens of said observation optical system.