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

• US 10,690,944 B2
• Filed: 12/01/2015
• Issued: 06/23/2020
• Est. Priority Date: 12/01/2014
• Status: Active Grant

• Current Assignee: Hoya Lens Thailand Limited (Hoya Corporation)
• Original Assignee: Hoya Lens Thailand Limited (Hoya Corporation)
• Inventors: Ogo, Yoichi, Nishimoto, Keiji, Ogawa, Naomi
• Primary Examiner(s): Wilkes, Zachary W
• Application Number:
  US15/532,046
• Publication Number:
  US 20170299896A1
• Time in Patent Office: 1,666 Days
• Field of Search: 35115965, 35115949, 35115959, 3511596, 35115962
• CPC Class Codes: G02B 1/115 Multilayers
• CPC Class Codes: G02B 1/116 including electrically conducting layers
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence
• CPC Class Codes: G02B 5/28 Interference filters
• CPC Class Codes: G02C 7/10 Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
• CPC Class Codes: G02C 7/104 having spectral characteristics for purposes other than sun-protection
• CPC Class Codes: G02C 7/107 Interference colour filters

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%.

Claims

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.