Variable focus optical apparatus
First Claim
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1. A variable focus optical apparatus, comprising a cavity containing a variable amount of transparent fluid defined between two transparent sheets, at least one of said sheets being a flexible membrane which is held in tension between two interengaging rings, wherein the rings are directly secured to each other.
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Abstract
A variable focus lens apparatus for use in spectacles or the like is formed from a fluid envelope comprising two sheets, at least one of which is flexible. The flexible sheet is retained in place between two rings, which are directly secured together. This may be by means of adhesive, ultrasonic welding, or any similar process. If the other sheet is rigid, then it may be directly secured to one of the rings.
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Citations
10 Claims
- 1. A variable focus optical apparatus, comprising a cavity containing a variable amount of transparent fluid defined between two transparent sheets, at least one of said sheets being a flexible membrane which is held in tension between two interengaging rings, wherein the rings are directly secured to each other.
Specification