Title:
LENS COATING LAYER
Document Type and Number:
WIPO Patent Application WO/2019/138363
Kind Code:
A3
Abstract:
The present invention relates to a lens having a refractive index ηι coated at least partially on at least one of its surfaces with a layer of an anti-scratch lacquer having a refractive index r\2 lower than η-ι, wherein between said lens and said layer of anti-scratch lacquer a coating layer comprising at least 3 sub-layers of at least one compound selected from the group consisting of Zirconium oxide, Silicon oxide, Titanium oxide, Tantalum oxide, Iridium oxide, Silver oxide and Magnesium fluoride is present, and wherein each of said at least 3 sub-layers has a thickness of lower than or equal to 100 nm. The invention also relates to a method for reducing or eliminating the iridescence phenomenon of a lens coated with an anti- scratch lacquer layer having a refractive index lower than the refraction index of the lens.
Inventors:
DE VITA MATTEO (IT)
Application Number:
PCT/IB2019/050214
Publication Date:
October 03, 2019
Filing Date:
January 11, 2019
Export Citation:
Assignee:
COERENT S R L (IT)
International Classes:
G02B1/115; G02B1/14
Domestic Patent References:
| WO2000031569A1 | 2000-06-02 |
Foreign References:
| US20150355380A1 | 2015-12-10 | |||
| US20090098409A1 | 2009-04-16 | |||
| US5168003A | 1992-12-01 |
Attorney, Agent or Firm:
CATTANEO, Elisabetta et al. (IT)
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