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:
Dec. 06, 2016
Filed:
Dec. 18, 2015
Sony Corporation, Tokyo, JP;
Tomoya Ikuta, Kanagawa, JP;
Takeshi Kubo, Kanagawa, JP;
Takashi Nakao, Tokyo, JP;
Kimihiro Saito, Saitama, JP;
Kenji Yamamoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
There is provided an optical disc device that performs recording on a land and a groove, including an optical path splitter configured to split a luminous flux returning from an optical disc into first and second optical paths, a first detector configured to receive a whole of the luminous flux that has passed through the first optical path, a second detector configured to receive a luminous flux of an inside part of the luminous flux that has passed through the second optical path, a spherical aberration error signal generation unit configured to generate a spherical aberration error signal on the basis of a difference between a first focus error signal obtained on the basis of a detection signal of the first detector and a second focus error signal obtained on the basis of a detection signal of the second detector, a spherical aberration correction unit, and an adjustment unit.