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:
Mar. 08, 2011
Filed:
Dec. 13, 2004
Optical disk apparatus for detecting tilt of an optical disk, and an optical disk for tilt detection
Yoshiharu Kobayashi, Katano, JP;
Yoshihiro Mushika, Neyagawa, JP;
Yoshiharu Kobayashi, Katano, JP;
Yoshihiro Mushika, Neyagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The invention provides an optical disk apparatus and an optical disk that are applicable to a multilayer optical disk, and enable tilt detection with a high precision. The optical disk has a transparent planar disk base member, a recording layer formed on the disk base member, and a reflecting layer in a certain positional relation to the recording layer. The optical disk apparatus includes a laser pointerfor irradiating a laser beam onto the recording layer of the optical disk by way of the disk base member to form a focusing spot on the recording layer, a photo-sensor arrayG for receiving a reflected beam from the reflecting layer, and an aberration mode detecting circuitH for detecting tilt of the optical disk by using an output from the photo-sensor arrayG.