DEVICE FOR WRITING AND/OR READING OPTICAL RECORDING MEDIUM OF VARIOUS DESIGNS
摘要
In order to identify the type of recording medium, a switch can be provided or alternatively a physical characteristic such as layer thickness can be defined. The changes of the focusing signal with time or the plausibility of the reproduction signal can be monitored. The reading beam is focused.
申请公布号
WO9734296(A2)
申请公布日期
1997.09.18
申请号
WO1997EP00943
申请日期
1997.02.27
申请人
DEUTSCHE THOMSON-BRANDT GMBH;DANG, LIEU, KIM;ZUCKER, FRIEDHELM;SCHROEDER, HEINZ-JOERG