Optical disc apparatus and defocus control method

Details Optical disc apparatus and defocus control method Optical disc apparatus and defocus control method

2006-02-01

2011-11-08

Giesy, Adam R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053280

Reexamination Certificate

active

08054716

ABSTRACT:
A defocus adjustment method includes a step of storing in a memory a range of defocus values for smooth operation of an optical disc apparatus, a step of measuring the defocus value of the optical disc loaded in the optical disc apparatus, a step of comparing the defocus value and the range of defocus values, a step of determining the optimal defocus value, and a step of using the optimal defocus value as a focusing bias value. This helps easily and quickly perform defocus adjustment that suits the loaded optical disc. Using as a focus bias value the defocus value determined through the defocus adjustment helps enhance the quality with which data is read from and data is written to the optical disc.

REFERENCES:
patent: 6240055 (2001-05-01), Takamine et al.
patent: 6339580 (2002-01-01), Kawashima et al.
patent: 6400661 (2002-06-01), Ogawa et al.
patent: 6430119 (2002-08-01), Okada et al.
patent: 6731573 (2004-05-01), Takeda
patent: 7286447 (2007-10-01), Ma et al.
patent: 2006/0013082 (2006-01-01), Ogura et al.
patent: 0 499 925 (1992-08-01), None
patent: 2003-257053 (2003-09-01), None
patent: 2003-323728 (2003-11-01), None

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