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. 31, 1999
Filed:
Jul. 24, 1998
Masatoshi Hirono, Chiba-ken, JP;
Yoriyuki Ishibashi, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An optical recording/reproduction apparatus records and reproduces information onto and from an associated recording medium by use of light from a light source. The apparatus includes a lens capable of generating an evanescent wave which is disposed in a light path from the light source to the recording medium, and a partial beam light intercepter for intercepting at least part of the light passing through the lens without contributing to generation of the evanescent wave. The light intercepter blocks the center part of a laser beam incident to the evanescent wave generating lens, thus reshaping it into a beam of hollow annular cross-section. This improves the optical resolution of the record/reproduction apparatus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile