Apparatus, system and method for gaze tracking based on photodetection by an eye-mountable device
US-2015362756-A1 · Dec 17, 2015 · US
Spectacle lens
US2021397022A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021397022-A1 |
| Application number | US-201917280013-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 27, 2019 |
| Priority date | Sep 28, 2018 |
| Publication date | Dec 23, 2021 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
Provided is a spectacle lens including multilayer films on an object-side surface and an eyeball-side surface of a lens substrate, in which a reduction ratio of light in a wavelength band of 800 to 1400 nm in the spectacle lens is 45.0% or more, a ratio of a mean reflectance on the eyeball-side surface of the spectacle lens to a mean reflectance on the object-side surface of the spectacle lens is 0.2 to 0.8 in the wavelength band, and a mean reflectance on the eyeball-side surface in a wavelength band of 315 to 400 nm is 5.0% or less.
First claim
Opening claim text (preview).
1 . A spectacle lens comprising multilayer films on an object-side surface and an eyeball-side surface of a lens substrate, wherein a reduction ratio of light in a wavelength band of 800 to 1400 nm in the spectacle lens is 45.0% or more, a ratio of a mean reflectance on the eyeball-side surface of the spectacle lens to a mean reflectance on the object-side surface of the spectacle lens is 0.2 to 0.8 in the wavelength band, and a mean reflectance on the eyeball-side surface in a wavelength band of 315 to 400 nm is 5.0% or less. 2 . The spectacle lens according to claim 1 , wherein the ratio of the mean reflectance is less than 0.6. 3 . The spectacle lens according to claim 1 , wherein the reflectance on each surface of the spectacle lens has at least one maximum value in the wavelength band of 800 to 1400 nm. 4 . The spectacle lens according to claim 1 , wherein the reflectance on each surface of the spectacle lens has at least one maximum value in a wavelength band of 500 to 570 nm. 5 . The spectacle lens according to claim 4 , wherein the largest maximum value in the wavelength band of 500 to 570 nm is more than 1.5%. 6 . The spectacle lens according to claim 1 , wherein the mean reflectance on the eyeball-side surface of the spectacle lens in a wavelength band of 315 to 380 nm is 5.0% or less. 7 . The spectacle lens according to claim 1 , wherein the mean reflectance on the object-side surface of the spectacle lens in a wavelength band of 315 to 380 nm is 30.0% or more. 8 . The spectacle lens according to claim 1 , wherein the mean reflectance on the object-side surface of the spectacle lens in a wavelength band of 280 to 315 nm is 50.0% or more. 9 . 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 9 or less. 10 . The spectacle lens according to claim 1 , wherein a sum of luminous reflectances on both surfaces of the spectacle lens is 3.0% or less.
Assignees
Inventors
Classifications
Interference colour filters · CPC title
Photochromic filters · CPC title
- G02C7/024Primary
Methods of designing ophthalmic lenses · CPC title
Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title
- G02C7/104Primary
having spectral characteristics for purposes other than sun-protection · CPC title
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- What does patent US2021397022A1 cover?
- Provided is a spectacle lens including multilayer films on an object-side surface and an eyeball-side surface of a lens substrate, in which a reduction ratio of light in a wavelength band of 800 to 1400 nm in the spectacle lens is 45.0% or more, a ratio of a mean reflectance on the eyeball-side surface of the spectacle lens to a mean reflectance on the object-side surface of the spectacle lens …
- 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 Thu Dec 23 2021 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).