Polarizing optical element comprising a polarizing film and method for manufacturing such element
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsCédric Begon, Alexandra Roos
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Abstract
A polarizing optical element comprises a transparent optical base element and a layered structure that incorporates a polarizing film. The polarizing film is of the dichroic dye type and is oriented uniaxially. The layered structure is bonded to the optical base element by means of a layered structure that includes at least one layer of a pressure-sensitive adhesive. Thanks to the use of pressure-sensitive adhesive, the polarizing film during the bonding operation maintains a high polarization efficiency and an optical quality compatible with many applications of the optical element, especially ophthalmic applications.
Claims34
A polarizing optical element comprising:
- an optical base element;
- a polarizing layered structure incorporating at least one polarizing film, said polarizing film containing at least one dichroic dye and being oriented,
- wherein the optical element further includes an adhesive layered structure that includes at least one layer of a pressure-sensitive adhesive of optical quality, placed between one surface of the optical base element and the polarizing structure so as to permanently retain said polarizing structure on the surface of the optical base element;
- wherein the optical base element comprises an ophthalmic lens.
A method for manufacturing a polarizing optical element comprising the following steps:
- providing an optical base element;
- providing a polarizing layered structure incorporating at least one polarizing film, said polarizing film containing at least one dichroic dye and being oriented;
- providing an adhesive layered structure incorporating at least one layer of a pressure-sensitive adhesive of optical quality;
- and
- pressing the polarizing structure against the surface of the optical base element with the adhesive structure placed between said polarizing structure and said optical base element;
- herein the optical base element comprises an ophthalmic lens.
Dependencies are inferred from the claim text.