Eye fundus camera

Details Eye fundus camera Eye fundus camera

1978-11-09

1981-05-12

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 16, 354 62, A61B 310, A61B 314, G03B 2900

Patent

active

042668611

ABSTRACT:
An improved eye fundus camera for photographing the fundus of a patient's eye is disclosed. Three separate energy sources are provided which include a first source of a visible light wave length for illuminating the fundus during photography, a second source including at least a first infrared wavelength band for illuminating the cornea of the patient's eye for alignment of the pupil on the optical axis, and a third source including at least a second infrared wavelength band for illuminating the fundus of the patient's eye for focusing the camera on the fundus. A wavelength selective filter is provided on the optical axis having a predetermined aperature. At least one of the infrared light source wavelengths can be transmitted through the filter to provide a full image of the cornea of the patient's eye for alignment purposes.

REFERENCES:
patent: 3016000 (1962-01-01), Noyori
patent: 3925793 (1975-12-01), Matsumura et al.
patent: 3936844 (1976-02-01), Matsumura
patent: 4068932 (1978-01-01), Ohta et al.

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