Eye-fundus camera easy for alignment of pupil

Details Eye-fundus camera easy for alignment of pupil Eye-fundus camera easy for alignment of pupil

1974-03-18

1976-02-03

Horan, John M.

G03B 2900

Patent

active

039368440

ABSTRACT:
The present invention relates to an improvement of the alignment system for the pupil in an eye-fundus camera. An auxiliary lens is provided so as to be freely inserted and pulled out at an optical path behind an object lens in an optical system for observing and photographing an eye fundus wherein said auxiliary lens is inserted at the same position as that of an image of the eye fundus which is formed by said object lens when said auxiliary lens is not inserted. Thus the image of a pupil is formed so that observation of the pupil becomes possible by an eye-fundus observation finder and the alignment of the pupil becomes easy.

REFERENCES:
patent: 3217622 (1965-11-01), Kiyono

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