Improvements in or relating to variable focus lenses
Номер патента: CA2265723A1
Опубликовано: 19-03-1998
Автор(ы): Joshua David Silver
Принадлежит: Individual
Опубликовано: 19-03-1998
Автор(ы): Joshua David Silver
Принадлежит: Individual
Реферат: A variable focus lens comprises first and second transparent, flexible membranes (2) which are tensioned and which define a cavity (30) in which a transparent, silicone oil (4) is sealed. Adjustment of the pressure or volume of the oil in the cavity changes the focal length of the lens. To fabricate the lens, the periphery of each membrane (2) is engaged between two rings (8, 10; 10, 12) of a set of three interengaging rings (8, 10, 12). The interengaged rings are crimped together to tension the membranes (2) and seal the cavity (30).
Improvements in or relating to variable focus lenses
Номер патента: GB1209234A. Автор: Basil Martin Wright. Владелец: National Research Development Corp UK. Дата публикации: 1970-10-21.