Ophthalmic instrument having self-calibrating optical system

Details Ophthalmic instrument having self-calibrating optical system Ophthalmic instrument having self-calibrating optical system

1999-01-20

1999-11-16

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

059844760

ABSTRACT:
An objective refractor, having light source and detection paths intersecting at a beamnsplitter uses light normally lost during testing of an eye to self-calibrate for optical errors introduced during production of the instrument.

REFERENCES:
patent: 3883235 (1975-05-01), Lynn et al.
patent: 4998819 (1991-03-01), Labinger et al.
patent: 5080477 (1992-01-01), Adachi
patent: 5106183 (1992-04-01), Yoder, Jr.

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