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:
Aug. 14, 2001
Filed:
Nov. 03, 1998
Kiichi Ueyanagi, Nakai-machi, JP;
Kazuo Baba, Nakai-machi, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A small-sized optical head and optical disk apparatus capable of high-density recording at a high data transfer rate. A collimated light beam is incident on a first surface of a transparent condensing medium. The light beam incident on the first surface is reflected by a reflective structure, such as a metallic film or a hologram, formed on the outside of a second surface of the transparent condensing medium. The reflected light forms a beam spot on a third surface of the transparent condensing medium. Light condensed at the beam spot is emitted as near field light, and propagates to a recording medium for optical recording or reproduction.