Title of Invention

A VARIABLE FOCUS LENS

Abstract

A variable focus lens comprising a transparent envelope at least partially defined by a flexible, transparent membrane (2) and containing a transparent fluid (4), a frame member (8) engaging one face of the flexible membrane (2) and a ring member (10, 12) engaging an opposite face of the flexible membrane (2), the ring member (10, 12) and the frame member (8) being urged towards each other by retaining means, wherein the respective surfaces (38, 40) of the frame member (8) and the ring member (10, 12) that engage the flexible membrane are substantially complementary and profiled so as to cause a peripheral region of the flexible membrane to change L direction more than once, and wherein at least one of the engaging surfaces (38, 40) is provided with a coating of high friction material to increase the frictional force between the at least 'one profiled surface and the flexible membrane.

Full Text

Documents:

in-pct-2000-547-che abstract.pdf

in-pct-2000-547-che claims granted.pdf

in-pct-2000-547-che correspondence others.pdf

in-pct-2000-547-che correspondence po.pdf

in-pct-2000-547-che description (complete) granted.pdf

in-pct-2000-547-che drawings.pdf

in-pct-2000-547-che form-1.pdf

in-pct-2000-547-che form-19.pdf

in-pct-2000-547-che form-3.pdf

in-pct-2000-547-che form-4.pdf

in-pct-2000-547-che form-5.pdf

in-pct-2000-547-che petition.pdf

in-pct-2000-547-che power of attorney.pdf

in-pct-2000-547-cheabstract-1.jpg

in-pct-2000-547-cheabstract.jpg