Spectacles provided with a magnifier having an automatic focusin

Details Spectacles provided with a magnifier having an automatic focusin Spectacles provided with a magnifier having an automatic focusin

1987-12-31

1989-09-12

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Combined

350146, G02C 100, G02B 2500

Patent

active

048654388

ABSTRACT:
Spectacles provided with a magnifier, in which magnifier elements are mounted on a body of spectacles, a distance to an object to be seen is measured, a movable lens encased in the magnifier element is controlled and driven forward or backward along an optical axis on the basis of the result of the measurement to automatically adjust the focal length of the magnifier elements. A user of spectacles can merely peep an object to be seen through the magnifier to always see a magnified image with the focal point adjusted.

REFERENCES:
patent: 2389428 (1945-11-01), Glasser
patent: 4418990 (1983-12-01), Gerber

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