Optical disk device configured to reliably reproduce address...

Details Optical disk device configured to reliably reproduce address... Optical disk device configured to reliably reproduce address...

2006-05-23

2006-05-23

Psitos, A M (Department: 2656)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

Reexamination Certificate

active

07050372

ABSTRACT:
An optical disk device which reproduces address information embossed and formed on an optical disk. Return light of laser light is detected by a photodetector which is split into at least two components along the radial direction and signals representing the return light are output. Address information is reproduced by selectively switching between a summation signal and a difference signal between two signals. When there is a focus deviation, the summation signal of two signals is used to reproduce the address information and when the optical disk is tilted, the difference signal of two signals is used to reproduce the address information.

REFERENCES:
patent: 5696742 (1997-12-01), Ogata et al.
patent: 6195320 (2001-02-01), Furumiya et al.
patent: 6292446 (2001-09-01), Watabe
patent: 6400662 (2002-06-01), Choi et al.
patent: 60-256928 (1985-12-01), None
patent: 11-273084 (1999-10-01), None
patent: 2000-082259 (2000-03-01), None
patent: 2000-200468 (2000-07-01), None
patent: 2001-176092 (2001-06-01), None
MAT (machine assisted translation) of 2001-176092.

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