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. 03, 2004
Filed:
Jun. 21, 2000
Takao Kobayashi, Takatsuki, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
A recording/reproducing apparatus is configured to displace near-field light for recording or reproduction and tracking illumination light toward an outer periphery of a recording pit when an off-track state toward the outer periphery occurs. The amount of reflected tracking illumination light increases since the reflectivity of an outer peripheral track band is higher than that of a recording region and that of an inner peripheral track band. The near-field light and the tracking illumination light are displaced toward an inner periphery of a recording pit when an off-track state toward the inner periphery occurs. The amount of reflected tracking illumination light decreases since the reflectivity of the inner peripheral track band is lower than that of the recording region and that of the outer peripheral track band. The single tracking illumination light is required for tracking control. The recording/reproducing apparatus can perform high-accuracy tracking control, is easy to manufacture, and is reduced in size.