Invention Grant
US08509042B2 Optical disc apparatus, focus control method and integrated circuit
有权
光盘装置,聚焦控制方法及集成电路
- Patent Title: Optical disc apparatus, focus control method and integrated circuit
- Patent Title (中): 光盘装置,聚焦控制方法及集成电路
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Application No.: US12992983Application Date: 2010-03-08
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Publication No.: US08509042B2Publication Date: 2013-08-13
- Inventor: Takeshi Shimamoto , Takeharu Yamamoto , Takashi Kishimoto
- Applicant: Takeshi Shimamoto , Takeharu Yamamoto , Takashi Kishimoto
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2009-063849 20090317
- International Application: PCT/JP2010/001598 WO 20100308
- International Announcement: WO2010/106755 WO 20100923
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical disc apparatus has: a spherical aberration correction unit (7) which corrects the spherical aberration generated in a light spot on a recording layer; a control unit (52) which focuses a light beam on a predetermined recording layer, and shifts the focal point position of the light beam from the current recording layer to another recording layer; and a focus jump control unit (60) which controls correction of spherical aberration and shift of the focal point position based on the interlayer distance between the current recording layer and a recording layer which adjoins in a direction opposite to a direction of shifting the focal point position of the light beam. By this configuration, focus jump is stably executed.
Public/Granted literature
- US20110075529A1 OPTICAL DISC APPARATUS, FOCUS CONTROL METHOD AND INTEGRATED CIRCUIT Public/Granted day:2011-03-31
Information query
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