Actuation mechanism for variable focal length spectacles

Details Actuation mechanism for variable focal length spectacles Actuation mechanism for variable focal length spectacles

1999-07-15

2000-04-25

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

351158, 359666, 359832, G02C 100, G02B 312

Patent

active

060536101

ABSTRACT:
An actuating mechanism for spectacles which include two variable focal length lens units. Each lens unit is fitted with a coupling member which extends from the lens unit into the bridge of the spectacles. A linearly-movable finger-operated slider, having a finger pad extending above the bridge, causes a cam within the bridge to rotate as it is moved, the cam being coupled to the coupling members causing them to move and the focal length of the lens units thereby to change.

REFERENCES:
patent: 2576581 (1951-11-01), Edwards
patent: 5138494 (1992-08-01), Kurtin
patent: 5371629 (1994-12-01), Kurtin
patent: 5526067 (1996-06-01), Cronin et al.
patent: 5688620 (1997-11-01), Kurtin
patent: 5956183 (1999-09-01), Epstein et al.

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