Invention Grant
- Patent Title: Optical disc drive and optical pickup apparatus that correct astigmatism
- Patent Title (中): 光盘驱动器和矫正散光的光学拾取装置
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Application No.: US10642758Application Date: 2003-08-19
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Publication No.: US07035174B2Publication Date: 2006-04-25
- Inventor: Minoru Hashimoto , Tomohiko Baba
- Applicant: Minoru Hashimoto , Tomohiko Baba
- Applicant Address: JP
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP
- Agency: Rader, Fishman & Grauer PLLC
- Agent Ronald P. Kananen
- Priority: JPP11-047422 19990225; JPP11-055410 19990303
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical disc drive compatible with optical discs of different types, for example, is provided. For focusing, through an optical system used in common with the different types of optical discs, a laser beam emitted from a selected one of a plurality of light sources disposed apart from each other radially of the optical disc, the optical system is moved radially of the optical disc correspondingly to the selection of the light source for emitting the laser light. Namely, it is possible to prevent the optical property from being deteriorated when a single optical pickup is used in common with such optical discs of different types.
Public/Granted literature
- US20040052172A1 Optical disc drive for performing read/write operations and optical disks Public/Granted day:2004-03-18
Information query
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