Optical article comprising a substrate with an antireflective coating

US10877182B2 · kind B2 · utility

Assignees

• Essilor International · FR
• CORPORATION DE L'ECOLE POLYTECHNIQUE DE MONTREAL · CA

Inventors

• William TROTTIER-LAPOINTE · Charenton-le-Pont, FR
• Oleg Zabeida · Montréal, CA
• Ludvik Martinu · Longueuil, CA
• Jolanta Klemberg-Sapieha · Rue du Bois des Loges, CA
• Karin Scherer · Charenton-le-Pont, FR

Key dates

• Filing date: May 11, 2017
• Grant date: Dec 29, 2020
• Expiry date: Oct 5, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/14
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical article including a substrate with two main surfaces, at least one of which is covered by a polymer coating having an outer surface, said coating including a first superficial layer beneath the outer surface having a first refractive index n1 and a second layer beneath the first superficial layer having a second refractive index n2, with n2<n1 and having the lowest refractive index of said polymer coating, and said coating exhibiting antireflective properties due to the difference between refractive indexes n1 and n2, said refractive index difference within the coating resulting from a plasma, corona, and/or an ion beam treatment of an initial polymer coating, through the outer surface. Also, a method for manufacturing this optical article.