Owner KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventors STAN, Sorin, G.

Pub. Number AU-A-2003276544

PCT Number PCT/IB03/05119

PCT Pub. Number WO2004/047090

Priority 60/427,217 18.11.02 US

Filing date 7 November 2003

Wipo publication date 15 June 2004

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 007/125 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - Optical beam sources therefor

G11B 007/00 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 011/105 Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group