Global Patent Index - EP 0973639 A4

EP 0973639 A4 2000-07-19 - OPTICAL ARTICLE WITH ANTI-REFLECTING COATING, CORRESPONDING COATING MATERIAL AND COATING METHOD

Title (en)

OPTICAL ARTICLE WITH ANTI-REFLECTING COATING, CORRESPONDING COATING MATERIAL AND COATING METHOD

Title (de)

OPTISCHER ARTIKEL MIT REFLEXFREIER BESCHICHTUNG, ENTSPRECHENDES BESCHICHTUNGSMATERIAL UND BESCHICHTUNGSVERFAHREN

Title (fr)

ARTICLE OPTIQUE TRAITE ANTI-REFLET, MATERIAU ET PROCEDE CORRESPONDANTS

Publication

EP 0973639 A4 (EN)

Application

EP 98913284 A

Priority

  • FR 9704392 A
  • US 9806234 W
  • US 5398697 P

Abstract (en)

[origin: WO9845113A1] The invention relates to an optical article which comprises a mineral substrate and an anti-reflecting coating on at least one surface of said mineral substrate. In a characteristic way, said mineral substrate has a refractive index between 1.5 and 1.9 and said anti-reflecting coating is a single layer, nanoporous/nanograin structured coating, obtained by heat-treating a sol-gel film, constituted of strongly interconnected, inorganic polymers, also linked with inorganic particles, said polymers forming a tri-dimensional network which has the general formula M-OH/M-O-M, in which M represents a metal or a metalloid, advantageously selected from silicon, aluminium, zirconium, titanium and mixtures thereof. The invention also relates to a sol-gel material which is precursor of said anti-reflecting coating, and to a coating method for obtaining said optical article. Said device is advantageously an ophthalmic lens.

IPC 1-7 (main, further and additional classification)

G02B 1/11; C03C 17/25

IPC 8 full level (invention and additional information)

G02B 1/11 (2006.01); C03C 1/00 (2006.01); C03C 17/00 (2006.01); C03C 17/25 (2006.01); C09D 183/00 (2006.01); C09D 185/00 (2006.01)

CPC (invention and additional information)

C03C 17/007 (2013.01); B82Y 30/00 (2013.01); C03C 1/008 (2013.01); C03C 2203/24 (2013.01); C03C 2217/212 (2013.01); C03C 2217/213 (2013.01); C03C 2217/214 (2013.01); C03C 2217/22 (2013.01); C03C 2217/23 (2013.01); C03C 2217/45 (2013.01); C03C 2217/475 (2013.01); C03C 2218/113 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE ES FR GB IT NL

DOCDB simple family

WO 9845113 A1 19981015; AR 012580 A1 20001108; BR 9808632 A 20000516; CA 2285944 A1 19981015; CN 1255889 A 20000607; EP 0973639 A1 20000126; EP 0973639 A4 20000719; JP 2001526798 A 20011218