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:
Oct. 22, 2024
Filed:
Oct. 20, 2017
Luxottica S.r.l., Belluno, IT;
Omar Grasso, Chivasso, IT;
LUXOTTICA S.R.L., Belluno, IT;
Abstract
A lens for sunglasses includes a convex front surface, functionally directed toward an item to be viewed, and a concave rear surface, functionally directed toward the eye of a person who is wearing the eyeglasses. The lens further includes a photochromatic layer, proximate to the front surface, and a screening layer defining a UV filter, proximate to the rear surface and arranged between the rear surface and the photochromatic layer. The photochromatic layer is in the range of wavelengths comprised between 380 nm and 780 nm and has a transmittance comprised between 10% and 60%, in an activated state thereof, and a wavelength comprised between 80% and 95%, in a deactivated state thereof. The screening layer has a transmittance lower than 0.5% in the range of wavelengths comprised between 280 nm and 400 nm.