Spectacle lens and method for producing same

Patent metadata

Field	Value
Publication number	US-2016209678-A1
Application number	US-201414914711-A
Country	US
Kind code	A1
Filing date	Sep 1, 2014
Priority date	Aug 30, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

An aspect of the present invention relates to a spectacle lens where at least one of an object-side surface and an eyeball-side surface has, in a lower region positioned downward from a fitting point or an optical center during use, reflection characteristics satisfying that: (1) a normal incidence average reflectance in a wavelength region of 400 to 500 nm is within a range of 1.0 to 15%; and (2) the normal incidence average reflectance is greater than a normal incidence average reflectance in the wavelength region of 400 to 500 nm in an upper region positioned upward from the lower region during use.

First claim

1 . A spectacle lens,
wherein at least one of an object-side surface and an eyeball-side surface has, in a lower region positioned downward from a fitting point or an optical center during use, reflection characteristics satisfying that: (1) a normal incidence average reflectance in a wavelength region of 400 to 500 nm is within a range of 1.0 to 15%; and (2) the normal incidence average reflectance is greater than a normal incidence average reflectance in the wavelength region of 400 to 500 nm in an upper region positioned upward from the lower region during use.

2 . The spectacle lens according to claim 1 ,
wherein the surface having the reflection characteristics further has reflection characteristics where a normal incidence reflectance in the wavelength region of 400 to 500 nm successively or gradually increases from a region positioned upward to a region positioned downward during use.

3 . The spectacle lens according to claim 1 ,
wherein a lens base material has a multilayer film directly or indirectly thereon, and the reflection characteristics are imparted to the spectacle lens by the multilayer film.

4 . The spectacle lens according to claim 1 ,
wherein a thickness of the multilayer film varies successively or gradually from a portion positioned upward to a portion positioned downward during use.

5 . The spectacle lens according to claim 1 ,
wherein only one of the object-side surface and the eyeball-side surface has the reflection characteristics.

6 . The spectacle lens according to claim 1 ,
wherein both of the object-side surface and the eyeball-side surface have the reflection characteristics.

7 . A method for producing a spectacle lens, wherein
the spectacle lens is the spectacle lens according to claim 3 , and the method comprises the step of forming the multiple deposition layer by repeating a plurality of vapor deposition steps for depositing a vapor deposition material onto a surface to be deposited of the lens base material, wherein, by disposing a shielding member over a portion of the surface to be deposited corresponding to the upper region or the lower region, an amount of deposition of the vapor deposition material thereto is reduced in at least one step of the plurality of vapor deposition steps.

8 . The method for producing the spectacle lens according to claim 7 ,
wherein the vapor deposition step, performed while the shielding member is disposed, is a first step or a last step of the plurality of vapor deposition steps.

Assignees

• Hoya Corp

Inventors

• Nishimoto Keiji

Classifications

• C23C14/044

  using masks to redistribute rather than totally prevent coating, e.g. producing thickness gradient · CPC title

• G02C7/105 Primary

  having inhomogeneously distributed colouring · CPC title

• G02B5/285

  comprising deposited thin solid films (G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361) · CPC title

• C23C14/30

  by electron bombardment · CPC title

• G02B5/26

  Reflecting filters (G02B5/28 takes precedence) · CPC title