Hoya Corporation

Hoya Lens Thailand Ltd.

Toppan Printing Co., Ltd.

Naomi Ogawa

Makoto Adachi

Nobuyuki Tadokoro

Yuko Komine

Yoichi Ogo

Koushi Harada

Keiji Nishimoto

Hitoshi Kamura

Kenji Takashiba

Masaaki Yanaka

Eisaku Iwasaki

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 normal incidence mean reflectance Rin a wavelength range of 430 to 450 nm measured on the eyeball-side surface of the spectacle lens and a normal incidence mean reflectance Rin a wavelength range of 430 to 450 nm measured on the object-side surface of the spectacle lens each are more than 0%, and Ris greater than R.

Spectacle lens and spectacles

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 Rin 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 Rin 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%.

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

An aspect of the present invention relates to an eyeglass lens comprising a lens substrate and a vapor-deposited film either directly or indirectly on the lens substrate, wherein the vapor-deposited film is an oxide film of metal selected from the group consisting of zirconium and tantalum, with an average grain size observed in a planar image obtained by a transmission electron microscope of equal to or greater than 3.5 nm and a proportion accounted for by grain boundaries, which are boundaries separating grains from regions outside of the grains, in a planar image obtained by a transmission electron microscope of less than 15%.

Eyeglass lens having improved heat resistance and scratch resistance

An aspect of the present invention relates to an eyeglass lens comprising a lens substrate and a vapor-deposited film either directly or indirectly on the lens substrate, wherein the vapor-deposited film is an oxide film of metal selected from the group consisting of zirconium and tantalum, with a proportion accounted for by regions observed in a streaky shape, in a columnar shape, or in a lump shape in a cross-sectional image of the vapor-deposited film obtained by a transmission electron microscope of equal to or less than 20%.

Eyeglass lens

An aspect of the present invention relates to a method of manufacturing an eyeglass lens, comprising determining a manufacturing condition by a method of determining a manufacturing condition of an eyeglass lens comprising a vapor-deposited film formed by vapor deposition using a vapor deposition source the main component of which is ZrO, and forming a vapor-deposited film by vapor deposition using a vapor deposition source the main component of which is ZrOunder the manufacturing condition that has been determined.

Method of manufacturing eyeglass lens

One embodiment of the present invention is a hard coat film having a hard coat layer and a function layer on a substrate film, wherein the hard coat layer is formed by irradiating an acrylic acid derivative with ionizing radiation, and wherein (a) a carboxylic acid group (C&#x2550;O) absorption intensity of a surface of the hard coat layer and (b) a carbon double bond (C&#x2550;C) absorption intensity of the hard coat layer surface satisfy a numerical value range represented expressed by the following Expression 1, the absorption intensities being measured by infrared ray spectroscopy: 0.15&#x2266;(b)/(a)&#x2266;0.30 . . . Expression 1.

Growing community of inventors

Tokyo, Japan

Naomi Ogawa