Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1995-01-17
1996-08-06
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351221, 351215, A01B 314
Patent
active
055438652
ABSTRACT:
A fundus camera, which has an illumination optical system for illuminating a fundus of an examinee's eye, an observation optical system for observing the fundus and a photographing optical system for photographing an image of the fundus, the photographing system sharing partially a common optical path with the observation optical system, comprises a beam splitter disposed in the optical path of the photographing optical system, the optical path being used in common with the observation optical system, to dispose coaxially an optical path of the illumination optical system and same of the observation optical system and the photographing optical system, and photoelectric imaging elements disposed respectively in the observation optical system and the photographing optical system.
REFERENCES:
patent: 5048946 (1991-09-01), Sklar et al.
patent: 5141303 (1992-08-01), Yamamoto et al.
patent: 5240006 (1993-08-01), Fujii et al.
patent: 5308919 (1994-05-01), Minnich
patent: 5341180 (1994-08-01), Isogai et al.
patent: 5475451 (1995-12-01), Robert et al.
Dudek James A.
Nidek Co. Ltd.
Sikes William L.
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