Optical pickup apparatus and optical disk drive apparatus

Details Optical pickup apparatus and optical disk drive apparatus Optical pickup apparatus and optical disk drive apparatus

2008-04-15

2008-04-15

Tran, Thang V. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112100

Reexamination Certificate

active

07359295

ABSTRACT:
An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective lens; and a light receiving device to which light reflected from the optical disk is directed through the objective lens and a beam splitting device, wherein: the beam splitting device has two first light receiving areas for detecting a push-pull signal and a second light receiving area for detecting a focus error signal, and a configuration is provided such that the center of the optical axis of the reflected light in the beam splitting device is made to lie within the second light receiving area for detecting the focus error signal.

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