G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1, 352/33
G11B 7/13 (2006.01) G02F 2/00 (2006.01) G11B 7/005 (2006.01) G11B 11/105 (2006.01)
Patent
CA 2025924
A magnetooptic player reads magnetooptically recorded signals on a disk by using a differential detector. Intermediate areas on a storage member used to store the magnetooptically record signals are sector marks and ID fields formed by undulations in the surface of the disk. Such sector marks and ID fields are read by detecting the intensity modulation in a reading light beam; for detecting such embossed marks and D-ROM disks, one-half of the differential detector is disabled for facilitating such detection in a differentially arranged detector.
International Business Machines Corporation
Saunders Raymond H.
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