Optical disc drive and optical pickup apparatus that correct...

Details Optical disc drive and optical pickup apparatus that correct... Optical disc drive and optical pickup apparatus that correct...

2006-04-25

2006-04-25

Patel, Gautam R. (Department: 2656)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044370

Reexamination Certificate

active

07035174

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.

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