Owner TDK CORPORATION

Inventors MORI, Masahiro; KOBAYASHI, Hideo

Pub. Number AU-A-2002346135

PCT Number PCT/JP02/06682

PCT Pub. Number WO2003/005351

Priority 2001-202501 03.07.01 JP

Filing date 2 July 2002

Wipo publication date 21 January 2003

G11B 007/09 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

G11B 007/004 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power

G11B 019/12 Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor - by sensing distinguishing features of records, e.g. diameter