Eye examining instrument

Details Eye examining instrument Eye examining instrument

1978-05-15

1981-03-24

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 6, 351 13, 354 62, A61B 314, A61B 310, G03B 2900

Patent

active

042576881

ABSTRACT:
The instrument projects, to the anterior portion of a human eye, plural component beams images of which form a single mark image when said component beams are aligned, and inspects if said component images of the mark are aligned. The instrument is exactly positioned with respect to the human eye when said component images are aligned.
The mark image is observed through a finder of the instrument or by an infrared-visible image converter connected to the instrument, or it is refocused on and detected by photoelectric cells.

REFERENCES:
patent: 3536384 (1970-10-01), Cocks
patent: 3780979 (1973-12-01), deGuillebon
patent: 3904280 (1975-09-01), Tate
patent: 3915564 (1974-09-01), Urban
Kapany, "Fiber Optics Principles and Applications" 1967, pp. 171-174.

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