Tdk Corporation

Sae Magnetics (h.k.) Limited

Hoya Lens Thailand Ltd.

Susumu Nagatsuka

Noboru Yamanaka

Yoshihiro Kudo

Eric Cheuk Wing Leung

Chris Chiu Ming Leung

Leo Wai Kay Lau

Charles Kin Chiu Wong

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.

Spectacle lens

Provided is a magnetic reproducing method that enables a thin-film magnetic head including a head element for reading data signals which has a noise in its output due to a low temperature to bring out an excellent read characteristic in which the noise is suppressed even under the use environment with the low temperature. The magnetic reproducing method comprises the steps of: heating a head element for reading data signals which has a noise in its output due to a low temperature; and performing a read operation by using the head element for reading data signals under condition that the head element is increased in temperature.

Magnetic reproducing method for suppressing low temperature noise

Growing community of inventors

Tokyo, Japan

Susumu Nagatsuka