Fundus camera

Details Fundus camera Fundus camera

2008-04-08

2008-04-08

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S205000, C351S207000, C351S213000

Reexamination Certificate

active

11063840

ABSTRACT:
A fundus camera capable of favorably obtaining a photographed fundus image and an observation fundus image, has an optical system having an objective lens and a diaphragm at a conjugate position with a pupil relative to the lens, for performing visible photographing and infrared observation via the lens and an aperture of the diaphragm, an optical system for illumination with visible and infrared light via the lens, a first plate, with a first black dot to cover an aperture image and at a conjugate position on an optical path with a position where a virtual image is formed relative to a lens surface reflecting the visible light, and a second plate, with a second black dot to cover an aperture image and in the vicinity of a conjugate position on the path with a position where a virtual image is formed relative to the surface reflecting the infrared light.

REFERENCES:
patent: 4098549 (1978-07-01), Matsumura
patent: 2004/0169818 (2004-09-01), Hoshino
patent: 2004/0252276 (2004-12-01), Nanjo et al.
patent: 60-57852 (1985-12-01), None
patent: 04295332 (1992-10-01), None
patent: A 2003-225208 (2003-08-01), None
patent: A 2004-261293 (2004-09-01), None

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