Spectacle lens and spectacles
US-2017299896-A1 · Oct 19, 2017 · US
Spectacle lens
US11835800B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11835800-B2 |
| Application number | US-201917279906-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 27, 2019 |
| Priority date | Sep 28, 2018 |
| Publication date | Dec 5, 2023 |
| Grant date | Dec 5, 2023 |
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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 multilayer films on both surfaces of a lens substrate, in which the sum of mean reflectances on both surfaces of the spectacle lens in a wavelength band of 400 to 440 nm is 20.0% or more, the reflectance on each surface of the spectacle lens has at least one maximum value in the wavelength band, and there is a difference between the mean reflectance on one surface of the spectacle lens and the mean reflectance on the other surface in the wavelength band.
First claim
Opening claim text (preview).
The invention claimed is: 1. A spectacle lens comprising multilayer films on both surfaces of a lens substrate, wherein a sum of mean reflectances on both surfaces of the spectacle lens in a wavelength band of 400 to 440 nm is 20.0% or more, a reflectance on each surface of the spectacle lens has at least one maximum value in the wavelength band of 400 to 440 nm, there is a difference between the mean reflectance on one surface of the spectacle lens and the mean reflectance on the other surface in the wavelength band of 400 to 440 nm, and the sum of mean reflectances on both surfaces of the spectacle lens in a wavelength band of 360 to 400 nm is 6.0% or less. 2. The spectacle lens according to claim 1 , wherein a ratio of the mean reflectance on one surface of the spectacle lens to the mean reflectance on the other surface is more than 0 and 0.9 or less in the wavelength band. 3. The spectacle lens according to claim 1 , wherein the mean reflectance on the object-side surface of the spectacle lens is less than the mean reflectance on the eyeball-side surface in the wavelength band. 4. The spectacle lens according to claim 1 , wherein a sum of the mean reflectances on both surfaces of the spectacle lens in a wavelength band of 500 to 570 nm is 1.0% or less. 5. The spectacle lens according to claim 1 , wherein a sum of luminous reflectances on both surfaces of the spectacle lens is 2.0% or less. 6. The spectacle lens according to claim 5 , wherein a sum of the maximum values out of the reflectances on both surfaces of the spectacle lens is 60.0% or less. 7. The spectacle lens according to claim 1 , wherein a multilayer film on each surface of the spectacle lens includes one or more high refractive index layers and one or more low refractive index layers, and the total number of layers is 10 or less.
Assignees
Inventors
Classifications
- G02C7/024Primary
Methods of designing ophthalmic lenses · CPC title
Photochromic filters · CPC title
- G02C7/104Primary
having spectral characteristics for purposes other than sun-protection · CPC title
Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title
Interference colour filters · CPC title
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Frequently asked questions
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- What does patent US11835800B2 cover?
- Provided is a spectacle lens including multilayer films on both surfaces of a lens substrate, in which the sum of mean reflectances on both surfaces of the spectacle lens in a wavelength band of 400 to 440 nm is 20.0% or more, the reflectance on each surface of the spectacle lens has at least one maximum value in the wavelength band, and there is a difference between the mean reflectance on one…
- Who is the assignee on this patent?
- Hoya Lens Thailand Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02C7/024. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 05 2023 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).