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:
Jun. 23, 2015
Filed:
Sep. 14, 2012
Hideaki Okano, Yokohama, JP;
Kazuo Watabe, Yokohama, JP;
Chikara Tanioka, Yokohama, JP;
Akihito Ogawa, Fujisawa, JP;
Takashi Usui, Saitama, JP;
Kazuaki Doi, Kawasaki, JP;
Hideaki Okano, Yokohama, JP;
Kazuo Watabe, Yokohama, JP;
Chikara Tanioka, Yokohama, JP;
Akihito Ogawa, Fujisawa, JP;
Takashi Usui, Saitama, JP;
Kazuaki Doi, Kawasaki, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
According to one embodiment, an information recording and reproducing apparatus including, a focus control module, an objective lens control module, a calculation module, and a tracking control module. If, detection the recording marks line, to focus a laser light of a second wavelength to the recording layer through an objective lens and to operation a recording layer tracking control using a tracking error signal taken out from a second reflected light and a laser light of a first wavelength to a track groove through the objective lens and to operation a guide layer tracking control to control the objective lens using a tracking error signal taken out from a first reflected light.