Calibration of a focus offset in an optical drive

Details Calibration of a focus offset in an optical drive Calibration of a focus offset in an optical drive

2004-12-30

2009-08-18

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044260, C369S044270, C369S053230, C369S275100

Reexamination Certificate

active

07577063

ABSTRACT:
Calibration of a focus offset in an optical drive. A calibration pattern, comprising a plurality of marked areas, is marked upon a medium. A user input is received, identifying a perceived darkest marked area of the calibration pattern. The focus offset is determined corresponding to the perceived darkest marked area.

REFERENCES:
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patent: 5574706 (1996-11-01), Verboom et al.
patent: 5831952 (1998-11-01), Yamada et al.
patent: 2003/0193864 (2003-10-01), Pate
patent: 2004/0004912 (2004-01-01), Morishima
patent: 1503573 (2005-02-01), None
International Search Report (PCT/US2005/038402), dated Mar. 30, 2006.

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