Optical disk device, semiconductor integrated circuit,...

Details Optical disk device, semiconductor integrated circuit,... Optical disk device, semiconductor integrated circuit,...

2005-08-23

2005-08-23

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044290, C369S044350

Reexamination Certificate

active

06934227

ABSTRACT:
To increase the vibration resistance of an optical disk device with respect to vibrations in the focus direction. More specifically, an optical disk device is provided with a multiplication means for generating a focus vibration component FC from the focus error signal FE, a multiplication means for generating a tracking vibration component TC from the tracking error signal TE, an adder for adding the focus vibration components FC and TC, and a low-pass filter for extracting the vibration component VC from the added results. Thus, the vibration component VC is extracted considering not only vibrations in the tracking direction but also vibrations in the focus direction, so that vibrations acting on the device can be more accurately detected, and vibration resistance is increased.

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patent: 2001134958 (2001-05-01), None
patent: 2002-298389 (2002-10-01), None

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