Optischer Artikel mit einer Interferenziellen Beschichtung mit Hoher Abriebfestigkeit

Details

Veröffentlichungs-Nr.

EP3640687

Aktenzeichen

EP18306373

Anmeldetag

18. Oktober 2018

Veröffentlichung

4. Dezember 2024

Erteilung

4. Dezember 2024

Rechtsraum

EP

IPC

G02B1/115// G02B1/116

Abstract

The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio:RD=thickness of the outermost low refractive index layersof theinterferential coatingthickness of theoutermost high refractive index layersof theinterferential coatingis higher than or equal to 1.5, and/orthe deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance.

Anmelder

Firma

Essilor International

Land

🇫🇷 Frankreich

Fachgebiete