Variable image magnification eye fundus camera

Details Variable image magnification eye fundus camera Variable image magnification eye fundus camera

1983-09-16

1985-12-17

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

354 62, A61B 314, B03B 2900

Patent

active

045589321

ABSTRACT:
A variable image magnification eye fundus camera has an illuminating system in which there are provided an annular aperture (7a, 7b) in a position optically conjugate with the iris (R) of the eye (E) to be inspected, and means (7, 12) for adjusting in accordance with the angle of view the diameter of the image of the annular aperture formed by the illuminating system at the iris, whereby it is possible to make a clear photograph of the eye fundus even if the diameter of the pupil is relatively reduced.

REFERENCES:
patent: 4068932 (1978-01-01), Ohta
patent: 4265518 (1981-05-01), Matsumura

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