Optical pickup and optical information reproduction system

Details Optical pickup and optical information reproduction system Optical pickup and optical information reproduction system

2007-07-26

2011-10-04

Pardo, Thuy (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053350, C369S044270, C369S047140

Reexamination Certificate

active

08031565

ABSTRACT:
In an optical disk apparatus having an exclusive RF detector plane mounted therefore, as a method of obtaining a synthesized readout signal based on band-synthesis is used in order to obtain a readout signal having a good S/N ratio, a waveform distortion easily caused by a delay time difference or a sensitivity difference in the playback at higher speeds can be prevented. In order to correct the delay time difference or a sensitivity error in two channels of RF signals to be band-synthesized according to the selection of the sensitivity or playback speed, a delay time controller, a sensitivity controller, and a selector for selecting a combination method are engaged. An information holder for such control or selection is also provided.

REFERENCES:
patent: 5703852 (1997-12-01), Kumagai
patent: 5757751 (1998-05-01), Chapman
patent: 6490234 (2002-12-01), Okamoto et al.
patent: 2002/0131352 (2002-09-01), Kuribayashi et al.
patent: 2006/0083146 (2006-04-01), Isshiki et al.
patent: 01-315039 (1989-12-01), None
patent: 5-166194 (1993-07-01), None
patent: 06-342522 (1994-12-01), None
patent: 2002-42371 (2002-02-01), None
patent: 2006-114165 (2006-04-01), None
Office Action issued in Japanese Patent Application No. 2006-342069 on Oct. 5, 2010.

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