Ophthalmic apparatus having means for automatic detection of app

Details Ophthalmic apparatus having means for automatic detection of app Ophthalmic apparatus having means for automatic detection of app

1981-09-22

1985-04-16

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

354 62, A61B 314, A61B 310, G03B 2900

Patent

active

045112274

ABSTRACT:
An ophthalmic apparatus having an automatic detection device of an appropriate position of the patient's eye. A target is projected through an aperture having two openings and through an objective lens to the patient's eye. The target projecting beam is reflected at the cornea of the eye and passed through the objective lens to form a target image. The position of the target image is detected photoelectrically by linear sensors or an area sensor.

REFERENCES:
patent: 4187014 (1980-02-01), Kato et al.
patent: 4196979 (1980-04-01), Kohayakawa et al.
patent: 4198144 (1980-04-01), Matsumura et al.
patent: 4252420 (1981-02-01), Kohayakawa
patent: 4257687 (1981-03-01), Kohayakawa
patent: 4357079 (1982-11-01), Karasawa

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