Improvements in or relating to the manufacture of variable focus fluid lenses

A method of manufacturing a variable focus fluid lens assembly (1) which comprises mounting a membrane assembly (40) within a recess (20) formed in a lens housing (10), said assembly (40) comprising a distensible transparent membrane (42) supported round, its periphery by a supporting member (44) an...

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Bibliographic Details
Main Authors RHODES DANIEL, STEVENS ROBERT, BRANDON-JONES JULIAN, EDGINTON ALEX
Format Patent
LanguageEnglish
Published 02.12.2015
Subjects
CONTACT LENSES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Summary:A method of manufacturing a variable focus fluid lens assembly (1) which comprises mounting a membrane assembly (40) within a recess (20) formed in a lens housing (10), said assembly (40) comprising a distensible transparent membrane (42) supported round, its periphery by a supporting member (44) and a flexible tubular wall (52) having first and second opposite ends (53, 54), one of said ends (53) being joined to the supporting member to form a cavity (55) within the wall that is closed at the one end by the membrane; filling the cavity with a transparent fluid (70); and fitting a transparent cover plate (62) to the housing across the other end (54) of the wall, said other end being joined sealingly to the cover plate (62) or to the housing (10), thereby to seal the cavity to form a compressible fluid-filled envelope. The cover plate (62) may comprise a fixed lens selected from a stock of lenses having the same shape for fitting to the lens assembly, but different other optical properties, such for example as different base curves and/or decentration distances.
Bibliography:Application Number: CN201480021888