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. 21, 2006
Kenji Nagatomi, Kaidu, JP;
Seiji Kajiyama, Gifu, JP;
Kenji Nagatomi, Kaidu, JP;
Seiji Kajiyama, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An optical pickup device is provided, in which, supposing that an angle formed by the meeting of a straight line connecting a center of an optical disk and an accessing position of an HD objective lens with a diameter L of the optical disk is a track angle θ, an oscillation angle α of an optical system including an HD laser, an HD half mirror, and an HD sensor, and a distance z of the HD objective lens are set so as to satisfy α−(θmax+θmin)/2=±45°, where θmax is the track angle θwhen the HD objective lens is positioned at an innermost circumference of the optical disk, and θmin is the track angle θwhen the HD objective lens is positioned at an outermost circumference of the optical disk.