Essilor International

Essilor International Charenton-le-pont

Xingzhao Ding

Hélène Maury

Yu Liu

William Trottier-lapointe

Christophe Valenti

Ilya Bolshakov

Chit Yaw Fu

Frédéric Guillain

Yassine Fakhreddine

Dominique Conte

Ker Chin Ang

Andrew Rosales Pelayo

Shi Qin Gracia Loo

Andrew Pelayo

Gracia Loo

William Trottier-Lapointe

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one of the main faces comprising 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 Rwithin a wavelength range of from 420 nm to 450 nm, which is higher than or equal to 17%, for an angle of incidence ranging from 0° to 15°, and the multilayer antireflection coating provides said at least one main face with a mean light reflection factor Rbetween 380 nm and 780 nm lower than or equal to 0.5%, for an angle of incidence ranging from 0° to 15°.

Optical lens having an antireflection coating reflecting harmful blue light

Disclosed is a user wearable optical article including an optical substrate and an interferential coating. The interferential coating may be disposed the substrate and may be configured to selectively reflect light of at least one range of wavelengths of an incident light in the near infrared light spectrum. A peak reflectance measured at a substantially normal to the optical article may be at least 70%. An eyewear including an optical article and a method for producing an optical article are also disclosed. The method may include providing the optical substrate and providing the interferential coating disposed on the optical substrate. The interferential coating may selectively reflect light of at least one range of wavelengths of an incident light in the near infrared light spectrum. A peak reflectance may be at least 70% and the interferential coating has a mean reflectance of less than 1.5% in a visible light range.

User wearable optical article, method for producing and eyewear using the same

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any Ta2O5 layer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal to 50 nm, and a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer. The reflection performance on at least one main face is improved in scotopic conditions, fornear infrared light or for a wide range of angles of incidence.

Optical lens having an enhanced interferential coating and a multilayer system for improving abrasion-resistance

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any TaOlayer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal to 100 nm, and a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer. The mean reflection factor Ron said rear main face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:1998 standard, is lower than 10%, for an angle of incidence of 35°.

Optical lens having an interferential coating and a multilayer system for improving abrasion-resistance

A system including a sensor configured so that the presence of a spectacle within a detection range of the sensor is detectable by the sensor when the spectacle includes a predetermined identification structure. The system may further include a control unit configured to receive an information from the sensor and to carry out a predetermined action, upon a condition in which the one or more spectacle lenses may be detected. A method may include detecting the presence of the spectacle within a detection range, and further providing, by the sensor, an information to the control unit. The information may confirm the detection of the spectacle. The method may include carrying out, by the control unit, the predetermined action. A computer program product including instructions to cause the system to execute the steps of the method. A computing device including the sensor and a memory.

Systems, devices and methods using spectacle lens and frame

This invention relates to an optical article comprising a transparent substrate coated with an antireflective coating comprising at least two layers having a low refractive index, and at least two layers having a high refractive index, one layer having a high refractive index being the nearest from said substrate, characterized in that the total physical thickness of said antireflective coating is equal to or lower than 600 nm, and such that: &#x2014;the mean reflection factor in the near infrared region is higher than or equal to 20% at an angle of incidence lower than 35&#xb0;, and &#x2014;the mean reflection factor Rof blue light at a wavelength ranging from 420 to 450 nm is higher than or equal to 7.0% at an angle of incidence lower than 15&#xb0;.

Optical article with high reflection in the near infrared region and in the blue light region

This invention relates to an optical article comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with an interferential coating, characterized in that said interferential coating comprises a stack comprising: &#x2014;at least one layer having a low refractive index which is &#x3c;1.6, called 'LI layer', &#x2014;at least one HI/VHI/HI triplet of three layers composed of one layer: &#x2022;having a very high refractive index which is &#x2265;2.1, called 'VHI layer', &#x2022;surrounded on both sides by two layers having a high refractive index which is &#x2265;1.6, called &#x201c;HI layers&#x201d;, and such that the mean reflectance in ultra violet (UV) region Rof said interferential coating is lower than or equal to 10% at an angle of incidence comprised between 30&#xb0; and 45&#xb0;.

Optical article comprising an interferential coating with a high reflection in the near infrared region (NIR)

This invention relates to an ophthalmic lens comprising an optical article comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with an antireflective coating, characterized in that the number of layers of said antireflective coating is higher than or equal to 5, and the antireflective coating comprises: &#x2014;at least one layer having a low refractive index which is &#x3c;1.6, defined as 'LI layer', &#x2014;at least one layer having a very high refractive index which is &#x2265;2.2, defined as 'VHI layer' and &#x2014;at least one layer having a high refractive index which is &#x2265;1.6 and &#x3c;2.2, defined as &#x201c;HI layer&#x201d;, the HI layer being the layer which is the nearest from said substrate amongst said LI, HI and VHI layers, and such that the mean reflection factor in the near infrared (NIR) region Rof said antireflective coating is higher than or equal to 40% at an angle of incidence lower than 35&#xb0;.

Optical article comprising an antireflective coating with a high reflection in the near infrared region (NIR)

Ophthalmic lens comprising an anti-reflective stack designed for scotopic or mesopic conditions, wherein the anti-reflective stack design method uses the scotopic luminosity function CIE 1951 (defined by the Commission Internationale de I'Eclairage).

Antireflective stack for low luminance conditions

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack composed of at least: characterized in that wetting layer (i) is in direct contact with metal layer (ii), with the proviso that said multilayered antireflective coating does not comprise silicon nitride and wherein (ii) the metal layer has a physical thickness equal to or higher than 6 nm.

Ophthalmic lens comprising a thin antireflective coating with a very low reflection in the visible region

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that:

Optical article comprising an antireflective coating with a very low reflection in the visible and ultraviolet regions

An ophthalmic lens comprising an antireflective stack which strongly reduces reflection in the UV range and in the visible range. The antireflective stack comprises composite high index layers comprising zirconium oxide and another metal oxide.

Composite high index layers for anti reflective stacks

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that: said at least one high refractive index layer (HI) is in direct contact with said at least one low refractive index layer (LI) forming a bilayer, said bilayer has a physical thickness lower than or equal to 60 nm, said bilayer is, in the direction moving away from said transparent substrate, in second to last place in said multilayered antireflective coating, said multilayered antireflective coating has a mean reflection factor Ruv between 280 nm and 380 nm, lower than 5% for an angle of incidence in the range from 20&#xb0; to 50&#xb0;.

Growing community of inventors

Singapore, Singapore

Xingzhao Ding