The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2006
Filed:
Dec. 26, 2002
Pierre Caron, Paris, FR;
Jean-paul Cano, Chennevieres sur Marne, FR;
Annette Cretier, Ivry sur Seine, FR;
Pierre Caron, Paris, FR;
Jean-Paul Cano, Chennevieres sur Marne, FR;
Annette Cretier, Ivry sur Seine, FR;
Essilor International Compagnie Generale d'Optique, Charenton Cedex, FR;
Abstract
An optical item comprising an organic or mineral glass substrate () and a transparent polymeric material layer (), characterized in that it comprises at least one intermediate layer () in direct contact with one main side of the substrate and the polymeric material layer, the intermediate layer(s) being made of particles of at least one colloidal mineral oxide and optionally of a binder, such (an) intermediate layer(s) having an initial porosity, and the initial porosity of the intermediate layer(s) being filled either by material from the polymeric material layer or by the substrate material if the latter is made in an organic glass and, optionally partly by the binder when present, so that the intermediate layer(s), after initial porosity filling, each represent a quarter waveplate with a wavelength in the range from 400 to 700 nm, preferably from 450 to 650 nm.