公开(公告)号：US20240230956A1

公开(公告)日：2024-07-11

申请号：US18558313

申请日：2022-06-09

Applicant: ESSILOR INTERNATIONAL

Inventor： Xingzhao DING ,  Hélène MAURY ,  Justine REDON ,  Coralie BARRAU ,  Gautier LAVAL ,  Frederic GUILLAIN ,  Caroline JOUSSELIN

IPC: G02B1/115 ,  G02C7/10

CPC classification number: G02B1/115 ,  G02C7/104

Abstract: Disclosed is an optical lens including a substrate having a front main face and a rear main face, at least one of the main faces including a multilayer antireflection coating having a stack of at least one high refractive index layer and at least one low refractive index layer, wherein the multilayer antireflection coating(s) present on the main face(s) provide(s) the optical lens with an average blue light reflection factor RmB3 within the wavelength range 440-460 nm, which is higher than or equal to 15%, for an angle of incidence ranging from 0° to 15°, and the spectral reflectivity curve of the multilayer antireflection coating has a reflection peak centered at a wavelength in the 340-420 nm range, and the reflection peak has a maximum reflectivity lower than or equal to 50% and exhibits a full width at half maximum higher than 70 nm.

公开(公告)号：US20230375828A1

公开(公告)日：2023-11-23

申请号：US18031393

申请日：2021-10-21

Applicant: Essilor International

Inventor： Justine REDON ,  Hélène MAURY ,  Mamonjy CADET ,  Nicolas MAITRE

IPC: G02B27/00 ,  G02B1/11

CPC classification number: G02B27/0018 ,  G02B1/11

Abstract: According to the invention, a first coating and a second coating are configured so that the optical system has a colorimetric parameter of evaluation of ghost image visibility lower than a predetermined threshold, said colorimetric parameter of evaluation being based on total ghost image transmission coefficient of at least one ghost image formed by internal reflection of a light beam from a light source between at least the first surface and the second surface and by transmission through the optical system, the total ghost image transmission coefficient being integrated over a visible spectral band and depending on a spectrum of the light source.