Optical article comprising an antireflective coating with a very low reflection in the visible region

US9772509B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Ilya BOLSHAKOV · Charenton-le-Pont, FR
• Francisco De Ayguavives · Charenton-le-Pont, FR

Key dates

• Filing date: Jul 5, 2013
• Grant date: Sep 26, 2017
• Expiry date: Jul 5, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/16
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one layer having a refractive index higher than or equal 1.5 and at least one layer having a refractive index lower than 1.5, such that:—the mean light reflection factor in the visible region Rv is lower than or equal to 0.5% for an angle of incidence lower than 35°;—the Chroma C* is equal or higher than 18, preferably 20, according to the international colorimetric CIE L*a*b* for an angle of incidence (Θ) of 15°.