Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1998-12-16
2000-03-07
Epps, Georgia
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
359666, G02C 706, G02B 106
Patent
active
060330708
ABSTRACT:
A variable focal length lens, for use in spectacles, is capable of variable power and astigmatism. It includes two independently controlled elastic cylindrical lenses which are mounted in series, usually but not necessarily at right angles to each other, on a common stiff transparent support. The lenses are each deformed by a pair of edge forces normal to each outer surface. The forces produce an essentially cylindrical shape of each outer surface. The two pairs of forces are independently controlled by two knobs conveniently located on the temple of the spectacles.
REFERENCES:
patent: 2269905 (1942-01-01), Graham
patent: 5673153 (1997-09-01), Soll et al.
patent: 5844708 (1998-12-01), Anselment et al.
patent: 5956183 (1999-09-01), Epstein
Author: Robert Graham, Title: A Variable Focus Lens and Its Uses, Date: Nov. 1940, J.O.S.A., vol. 30, pp. 560 to 563.
Epps Georgia
Schwartz Jordan M.
LandOfFree
Variable focal length lens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable focal length lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable focal length lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-356359