Patent · US Active

Optical article protecting from blue light

US10845625B2 · kind B2 · utility

1Cited by

3References

16Claims

0Family size

Assignee

Essilor International · FR

Inventors

Aude Carrega · Charenton-le-Pont, FR
Armel Jimenez · Charenton-le-Pont, FR
Franck Lestournelle · Charenton-le-Pont, FR
Amelie Kudla · Charenton-le-Pont, FR

Key dates

Filing date	Nov 6, 2015
Grant date	Nov 24, 2020
Priority date	—
Expiry date	Jun 5, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/28
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 4, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, and blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face. This optical article can be used to protect the eyes of a user from phototoxic blue light.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.