Alignment system and ophthalmic instrument incorporating the sam

Details Alignment system and ophthalmic instrument incorporating the sam Alignment system and ophthalmic instrument incorporating the sam

1977-09-30

1979-12-25

Evans, F. L.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with two or more projected...

351 1, 351 30, 356153, 356399, G01C 300, A61B 302

Patent

active

041803230

ABSTRACT:
An optical alignment system having a movable portion which contains a centering reticle and range finder, the movable portion is optically coupled to a stationary portion including a field lens to permit the precise positioning of a member relative to an object observed at the field lens. A zone parallel light and an image on the field lens permit adjustment of the member and movable portion without corresponding movement of the operator's head. The system is readily combined with an optometer to provide precision positioning of an optometer eyepiece relative to a patient's eye.

REFERENCES:
patent: 881127 (1908-03-01), Jacob
patent: 3871772 (1975-03-01), Munnerlyn et al.
patent: 3904280 (1975-09-01), Tate, Jr.

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