Invention Grant
- Patent Title: Optical recording medium driving device and spherical aberration adjustment method
- Patent Title (中): 光记录介质驱动装置和球面像差调整方法
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Application No.: US11856407Application Date: 2007-09-17
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Publication No.: US07843788B2Publication Date: 2010-11-30
- Inventor: Masatoshi Nishino
- Applicant: Masatoshi Nishino
- Applicant Address: JP Tokyo
- Assignee: Sony NEC Optiarc Inc.
- Current Assignee: Sony NEC Optiarc Inc.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2006-260297 20060926
- Main IPC: G11B20/18
- IPC: G11B20/18

Abstract:
An optical recording medium driving device includes an optical head, an evaluation signal generating section, a focus servo section, a spherical aberration correction section, a focus bias adjuster, and a system controller. The optical head has a focus servo mechanism and a spherical aberration correction mechanism, irradiates a laser light, and detects a reflected light. The evaluation signal generating section generates, based on the reflected light, an evaluation signal. The focus servo section drives the focus servo mechanism according to a focus error signal to perform focus servo. The spherical aberration correction section drives the spherical aberration correction mechanism to perform spherical aberration correction. The focus bias adjuster adds focus bias to a focus loop. The system controller performs an operation for setting an adjustment spherical aberration correction value.
Public/Granted literature
- US20080074973A1 OPTICAL RECORDING MEDIUM DRIVING DEVICE AND SPHERICAL ABERRATION ADJUSTMENT METHOD Public/Granted day:2008-03-27
Information query
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