Patent ID: 6304723
Filing Date: 2001-10-16
Classification: A61B

Abstract:
A retinal camera comprising:an illuminating system which applies illuminating light from an illumination light source to the fundus of an eye to be examined;a photographing system which photographs the illuminated fundus of the eye, said photographing system having a stop and a focusing lens;a projection system which projects a focus detecting light beam from a light source other than said illumination light source onto the fundus of the eye, without passing through said stop and said focusing lens, by a fixed optical system from a position being eccentric with respect to the optical axis of said photographing system; anda light position sensor which receives reflected light of the focus detecting light beam from the fundus of the eye through said stop and said focusing lens, the focus state of said photographing system being detected by the deviation of the light beam received by said light position sensor from a predetermined position.