Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2011-07-19

2011-07-19

Lamb, Christopher R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320, C369S053190

Reexamination Certificate

active

07983119

ABSTRACT:
An optical disc apparatus reliably executes a seek operation even if an optical disc is warped. Tilt adjustment values spanning from the inner circumference to the outer circumference of an optical disc are stored. When seeking from a start address to a destination address, a tilt adjustment value A at the start address and a tilt adjustment address C at the destination address are not directly used. A tilt adjustment value k·C (k<1) is used during a coarse seek operation until the neighborhood of the destination address and a tilt adjustment value C is used during a fine seek operation from the neighborhood of the destination address to the destination address.

REFERENCES:
patent: 7313058 (2007-12-01), Arakawa
patent: 2005/0180278 (2005-08-01), Suzuki et al.
patent: 2005/0207303 (2005-09-01), Yonezawa
patent: 2008/0239893 (2008-10-01), Kataoka
patent: 10-222860 (1998-08-01), None

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