Control means for optical instrumentation

Details Control means for optical instrumentation Control means for optical instrumentation

1980-10-30

1983-01-04

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350420, 350433, 351200, G02B 1308, G02B 1500

Patent

active

043670156

ABSTRACT:
In an ophthalmic refractor system for determining cylinder power and direction of axis for visual correction, cylinder axis orientation based upon corrective cylinder power in the refractor viewing path is automatically determined and introduced into the system.

REFERENCES:
patent: 4043641 (1977-08-01), Gottlieb
patent: 4117341 (1978-09-01), Persson
patent: 4179196 (1979-12-01), Persson et al.
patent: 4185896 (1980-01-01), Buhler
patent: 4203651 (1980-05-01), Persson

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