Optical disk recording/reproducing device and disk...

Details Optical disk recording/reproducing device and disk... Optical disk recording/reproducing device and disk...

2005-07-14

2010-10-05

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053220

Reexamination Certificate

active

07808870

ABSTRACT:
An optical disk recording/reproduction device and a disk determination method for an optical disk recording/reproduction device. The disk determination method compares with a threshold value a drive value when the arrival of a focus point at a recording surface is detected during a focus search relative to an optical disk (301) or a drive value during an on-focus state. By this, two or more kinds of optical disks having different substrate thicknesses are determined. The threshold value is determined based on a drive value during an on-focus state when one or more kinds of disks out of the two or more kinds of optical disks become reproducible.

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patent: 2000-242932 (2000-09-01), None
patent: 2000-243020 (2000-09-01), None
patent: 2000243020 (2000-09-01), None

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