Visible-light photoinitiators and uses thereof
US-2016357031-A1 · Dec 8, 2016 · US
Spectacle lens
US2020018993A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020018993-A1 |
| Application number | US-201916584990-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 27, 2019 |
| Priority date | Mar 31, 2017 |
| Publication date | Jan 16, 2020 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is a spectacle lens including: a lens substrate containing an ultraviolet absorber; and an antireflective film formed on at least one of a convex surface of the lens substrate and a concave surface facing the convex surface, in which the lens substrate is dyed with a yellow dye.
First claim
Opening claim text (preview).
What is claimed is: 1 . A spectacle lens comprising: a lens substrate containing an ultraviolet absorber; and an antireflective film formed on at least one of a convex surface of the lens substrate and a concave surface facing the convex surface, wherein the lens substrate is dyed with a yellow dye. 2 . The spectacle lens according to claim 1 , wherein the spectacle lens has a luminous transmittance of 90% or more and a blue light cut ratio calculated by the following formulas 1 and 2 of more than 15% and 25% or less, and the convex surface or the concave surface has a reflectance of less than 2.5%: T ( % ) = ∫ 380 nm 500 nm τ ( λ ) I ( λ ) d λ ∫ 380 nm 500 nm I ( λ ) d λ ( Formula 1 ) “ Blue light cut ratio ” = 100 - T ( % ) ( Formula 2 ) (wherein λ represents a wavelength of LED light, and τ(λ) represents a transmittance at the wavelength λ, and I(λ) represents an intensity of light at the wavelength λ). 3 . The spectacle lens according to claim 1 , wherein at least one surface of the spectacle lens has a luminous reflectance of 1% or less. 4 . The spectacle lens according to claim 2 , wherein at least one surface of the spectacle lens has a luminous reflectance of 1% or less.
Assignees
Inventors
Classifications
- G02C7/108Primary
Colouring materials · CPC title
- G02C7/104Primary
having spectral characteristics for purposes other than sun-protection · CPC title
Multilayers · CPC title
Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence) · CPC title
Interference colour filters · CPC title
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Frequently asked questions
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- What does patent US2020018993A1 cover?
- Provided is a spectacle lens including: a lens substrate containing an ultraviolet absorber; and an antireflective film formed on at least one of a convex surface of the lens substrate and a concave surface facing the convex surface, in which the lens substrate is dyed with a yellow dye.
- Who is the assignee on this patent?
- Hoya Lens Thailand Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02C7/108. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Jan 16 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).