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:
Feb. 04, 2003
Filed:
May. 16, 2001
Sakuya Tamada, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical recording medium having a laminated structure portion( ) including a light-emission layer( ) and a recording layer( ). The light-emission layer( ) is made of a light-emission material excited by reproducing laser light to emit fluorescent light, and the recording layer( ) is made of a material in which at least a refractive index or an absorption coefficient can be changed relative to light emitted from the light-emission layer by recording laser light. The recording layer( ) is disposed to be closer to a side into which reproducing laser light is introduced than the light-emission layer( ). Then, recorded information recorded on the recording layer by the change of the refractive index or the absorption coefficient is read out from the recording layer as the change of intensity of light emitted from the light-emission layer( ) when it is irradiated with reproducing laser light. This optical recording medium can realize an optical memory which can generate a reproduced signal with a high S/N.