EP2685293A3

Optical article comprising an antireflective coating with a low reflection both in the ultraviolet region and in the visible region

Abstract

This invention relates to an ophthalmic lens with a low reflection both in the ultraviolet region and in the visible region, comprising a substrate provided on its rear main face with a multilayered antireflective coating (3-7 layers) comprising a stack of at least one layer with a high refractive index and at least one layer with a low refractive index, having a mean reflection factor on the rear face in the visible region Rm lower than or equal to 1.15%, a mean light reflection factor on the rear face in the visible region Rv lower than or equal to 1%, a mean reflection factor RUV on the rear face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:1998 standard, lower than 5%, for angles of incidence of 30° and 45°, the antireflective coating outer layer being a silica-based layer. The lens according to the invention does especially prevent the reflection of the UV radiation produced by light sources located behind the wearer.

Term

5.2 yearsto projected expiry

Projected expiry 9 December 2031, counted from filing; an application has no term until it is granted.

  1. Priority
  2. Filed
  3. Published
  4. Today
  5. Projected expiry

Every citation, both ways

Citations
DocumentRelationOfficeCited during
EP1174734A2CitesEuropean Patent Office (EPO)Search report
WO2010109154A1CitesWorld Intellectual Property Organization (WIPO)Search report