Photochromic opitcal element
AssigneeTransitions Optical, Inc.
InventorCarol Knox
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Abstract
Described are optical elements made of a substrate having connected thereto an at least partial film of photochromic adhesive and an at least partial film of a polymeric organic material. Also described are optical elements made of a substrate having connected thereto an at least partial superstrate of a sealed photochromic composite of a film of a first polymeric organic material and a film of a second polymeric organic material having an at least partial film of a photochromic adhesive placed between the films of first and second polymeric organic materials. Methods to prepare the optical elements are also described.
Claims16
An optical element comprising:
- a) a substrate;
- b) an at least partial film of a photochromic adhesive comprising an at least partially adhesive material adapted to be thermoplastic and a photochromic amount of a photochromic material;
- c) an at least partial film of a first polymeric organic material connected to said film of photochromic adhesive;
- and
- d) an at least partial film of a second polymeric organic material, which is the same or different from said first polymeric organic material, interposed between said substrate and said partial film of photochromic adhesive, thereby to form an at least partial superstrate of a photochromic composite comprising said photochromic adhesive interposed between the films of the first and second polymeric organic materials;
- wherein said photochromic composite is sealed by securing edges of the film of said first polymeric material to edges of the film of said second polymeric material such that all of the photochromic adhesive interposed between the films of the first and second polymeric organic materials is kept in the photochromic composite.
Dependencies are inferred from the claim text.