Patent ID: 6826359
Filing Date: 2004-11-30
Classification: A61B,H04N

Abstract:
A fundus camera comprising:a body unit having photographing optical system to photograph a fundus to be observed; and TV relay lens unit which is detachably mounted on said body unit and having a function to direct a fundus image forming luminous flux from said photographing optical system to plurality of TV cameras, wherein said TV relay lens unit is arranged to be mountable simultaneously a visible-fluorescent photographing/infrared-fluorescent photographing TV camera having sensitivity for both of visible light and infrared light, a fundus observing TV camera having sensitivity for infrared light to observe a fundus when infrared-fluorescent photographing mode is selected, and a color photographing TV camera having sensitivity for visible light, wherein said TV relay lens unit is equipped with a switching mirror which is retractably and insertably arranged in an optical path of said fundus image forming luminous flux for switching said color photographing TV camera and said visible-fluorescent photographing/infrared-fluorescent photographing TV camera in accordance with the photographing mode; and a reflecting optical element which is arranged between said switching mirror and said color photographing TV camera to direct said fundus image forming luminous flux to said fundus observing TV camera, and said switching mirror is retracted from the optical path of said fundus image forming luminous flux to direct said flux to said fundus observing TV camera when observing a fundus in said infrared-fluorescent photographing mode, and said switching mirror is instantaneously inserted into said optical path to direct said fundus image forming luminous flux to said visible-fluorescent photographing/infrared-fluorescent photographing TV camera when photographing the fundus in said infrared-fluorescent photographing mode.