Optical article having an interferential coating with an improved abrasion-resistance
US-12092908-B2 · Sep 17, 2024 · US
Optical article having an interferential coating with a high abrasion-resistance
US12523796B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12523796-B2 |
| Application number | US-201917285594-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 18, 2019 |
| Priority date | Oct 18, 2018 |
| Publication date | Jan 13, 2026 |
| Grant date | Jan 13, 2026 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio: (I) is higher than or equal to 1.5, and/or the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance. R D = thickness of the outermost low refractive index layer ( s ) of the interferential coating thickness of the outermost high refractive index layer ( s ) of the interferential coating ( I )
First claim
Opening claim text (preview).
The invention claimed is: 1 . An optical article comprising a substrate having at least one main face successively coated with: an abrasion-resistant and/or scratch-resistant coating; a monolayer sub-layer having a thickness higher than or equal to 250 nm and less than or equal to 450 nm; a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, wherein the optical article has a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7; and the ratio: R D = thickness of the outermost low refractive index layer ( s ) of the interferential coating thickness of the outermost high refractive index layer ( s ) of the interferential coating is higher than or equal to 1.5; or the interferential coating comprises at least one high refractive index layer having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm, and the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance by bombarding by means of an ion beam said high refractive index layer while it is being formed. 2 . The optical article of claim 1 , wherein the sub-layer has a thickness higher than or equal to 300 nm. 3 . The optical article of claim 1 , wherein the sub-layer has a thickness higher than or equal to 350 nm. 4 . The optical article of claim 1 , wherein the sub-layer is a SiO 2 -based layer. 5 . The optical article of claim 1 , wherein the sub-layer is in direct contact with the interferential coating. 6 . The optical article of claim 1 , wherein the deposition of the sub-layer is conducted in a vacuum chamber under a pressure lower than 1.6×10 −4 mBar. 7 . The optical article of claim 1 , wherein the deposition of the sub-layer is conducted in a vacuum chamber in which no supplementary gas is supplied during said deposition. 8 . The optical article of claim 1 , wherein the ratio R D is higher than or equal to 2. 9 . The optical article of claim 8 , wherein the ratio R D is higher than or equal to 2.7. 10 . The optical article of claim 1 , wherein the optical article has a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 8. 11 . The optical article of claim 1 , wherein the interferential coating comprises at least one high refractive index layer having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm, and the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance by bombarding by means of an ion beam said high refractive index layer while it is being formed. 12 . The optical article of claim 1 , wherein: the ratio R D is higher than or equal to 1.5; and the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate is carried out under ionic assistance by bombarding by means of an ion beam said high refractive index layer while it is being formed. 13 . The optical article of claim 1 , wherein the interferential coating is an antireflection coating. 14 . The optical article of claim 1 , wherein the optical article is an ophthalmic lens. 15 . A method of manufacturing the optical article of claim 1 , comprising: providing an optical article comprising a substrate having at least one main face; depositing onto a main surface of the substrate an abrasion-resistant and/or scratch-resistant coating, a monolayer sub-layer having an exposed surface and a thickness higher than or equal to 250 nm and less than or equal to 450 nm; depositing onto said exposed surface of the sub-layer a multilayer interferential coating comprising at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, thereby obtaining a coated optical article, having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7; and the ratio: R D
Assignees
Inventors
Classifications
by means of bombardment with energetic particles or radiation · CPC title
Applying coatings; tinting; colouring (printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055) · CPC title
including electrically conducting layers · CPC title
- G02B1/115Primary
Multilayers · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12523796B2 cover?
- The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index la…
- Who is the assignee on this patent?
- Essilor Int
- What technology area does this patent fall under?
- Primary CPC classification G02B1/115. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).