Spectacle lens that reflects blue light, and spectacles equipped with the spectacle lens

Patent metadata

Field	Value
Publication number	US-10690944-B2
Application number	US-201515532046-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Dec 1, 2014
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Provided a spectacle lens including a lens base material and a multilayer film provided on each surface of an eyeball-side surface and an object-side surface of the lens base material, in which a mean reflectance R B(object) in a wavelength range of 430 to 450 nm measured on the object-side surface of the spectacle lens is equal to or more than 1.00%, and a mean reflectance R UV(eye) in a wavelength range of 280 to 380 nm measured on the eyeball-side surface of the spectacle lens is less than or equal to 15.00%.

First claim

The invention claimed is:

1. A spectacle lens comprising:
a lens base material; and
a multilayer film provided on each surface of an eyeball-side surface and an object-side surface of the lens base material,
wherein:
a mean reflectance R B(object) in a wavelength range of 430 to 450 nm measured on the object-side surface of the spectacle lens is equal to or more than 2.00% and less than or equal to 10.00%,
a mean reflectance R B(eye) in the wavelength range of 430 to 450 nm measured on the eyeball-side surface of the spectacle lens is greater than the mean reflectance R B(object) , and
a mean reflectance R UV(eye) over the entire wavelength range of 280 to 380 nm measured on the eyeball-side surface of the spectacle lens is greater than or equal to 6.11% and less than or equal to 15.00%.

2. The spectacle lens according to claim 1 , wherein the mean reflectance R B(eye) is equal to or more than 2.00% and less than or equal to 10.00%.

3. The spectacle lens according to claim 1 , wherein a maximum reflectance in a wavelength range of 380 to 500 nm measured on the eyeball-side surface of the spectacle lens is in a wavelength range of 400 to 480 nm.

4. The spectacle lens according to claim 1 , wherein
a mean reflectance in a wavelength range of 520 to 580 nm measured on the eyeball-side surface of the spectacle lens and a mean reflectance in a wavelength range of 520 to 580 nm measured on the object-side surface each are less than or equal to 0.60%, and
a mean reflectance in a wavelength range of 580 to 780 nm measured on the eyeball-side surface of the spectacle lens and a mean reflectance in a wavelength range of 580 to 780 nm measured on the object-side surface each are less than or equal to 3.00%.

5. The spectacle lens according to claim 1 , wherein the multilayer film provided on the eyeball-side surface of the lens base material and the multilayer film provided on the object-side surface of the lens base material each are a multilayer film in which a plurality of coats including an inorganic material as a principal component is laminated.

6. The spectacle lens according to claim 5 , wherein the multilayer film provided on the eyeball-side surface of the lens base material and/or the multilayer film provided on the object-side surface of the lens base material includes at least one laminated structure in which a coat including silicon oxide as a principal component and a coat including zirconium oxide as a principal component are adjacent.

7. The spectacle lens according to claim 5 , wherein the multilayer film provided on the eyeball-side surface of the lens base material and/or the multilayer film provided on the object-side surface of the lens base material includes at least one laminated structure in which a coat including silicon oxide as a principal component and a coat including niobium oxide as a principal component are adjacent.

8. The spectacle lens according to claim 5 , wherein the multilayer film provided on the eyeball-side surface of the lens base material and/or the multilayer film provided on the object-side surface of the lens base material includes at least one layer of a coat including conductive oxide as a principal component.

9. The spectacle lens according to claim 5 , wherein the coats are a vapor deposition film.

10. Spectacles comprising:
a spectacle lens according to claim 1 ; and
a frame equipped with the spectacle lens.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Ogo Yoichi
• Nishimoto Keiji
• Ogawa Naomi

Classifications

• G02C7/107

  Interference colour filters · CPC title

• G02C7/104 Primary

  having spectral characteristics for purposes other than sun-protection · CPC title

• G02B1/116

  including electrically conducting layers · CPC title

• G02C7/10 Primary

  Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title

• G02B5/28

  Interference filters · CPC title