OPTICAL MEDIUM TO MAKE RECORDS OF VARIOUS VIBRATION CHARACTERISTICS FOR USER ZONE AND END ZONE Russian patent published in 2004 - IPC

Abstract RU 2231831 C2

FIELD: optical recording.

SUBSTANCE: proposed optical medium has user data zone and end zone with grooves made therein and areas in-between. Curvatures are formed on at least one side surface of grooves in user data zone and end zone so as to ensure that their characteristics were different for user data zone and end zone. Such measures make it possible to prevent deviation of optical head unit from user zone.

EFFECT: improved recording and/or reproduction quality.

24 cl, 8 dwg, 2 tbl

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RU 2 231 831 C2

Authors

Joon Du-Seop

Li Kiung-Geun

Choj Bioung-Kho

Shim Dzhae-Seong

Dates

2004-06-27—Published

2002-06-17—Filed