The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Jan. 04, 2013
Fujifilm Corporation, Tokyo, JP;
Toshiyuki Kitahara, Odawara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An optical information recording mediumcomprises: a plurality of recording layers, each of which undergoes a change in a refractive index by irradiation with a recording beam; and at least one intermediate layerprovided between the plurality of recording layers. The recording layerand the intermediate layerhave different refractive indices, and, among interfaces between the plurality of recording layersand the at least one intermediate layer, a recording layerand an intermediate layerdisposed adjacent to the recording layerat an incident side from which the recording beam enters the recording layerare merged with each other at an interface (near-side interface) therebetween, whereby a refractive index gradually changes at the interface.