Optical: systems and elements – Lens – Fluid
Reexamination Certificate
2008-09-09
2008-09-09
Spector, David N (Department: 2873)
Optical: systems and elements
Lens
Fluid
C359S665000
Reexamination Certificate
active
11272036
ABSTRACT:
Variable focus optical devices, in particular lenses, can include a cavity at least partially defined by a flexible member (2), which may be retained between engaging portions of a frame member (8) and a ring member (12), such that a peripheral region of the membrane is caused to change direction more than twice. The engaging portions of the ring and frame may be high-friction surfaces. In addition, methods of filling a cavity of a lens with transparent fluid, methods of adjusting the pressure of fluid in the cavity, and methods of sealing such a cavity are described, as well the use of such lenses in adjustable spectacles.
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