Owner PIONEER CORPORATION

Inventors ARAKI, Yoshitsugu; SATO, Mitsuru

Pub. Number AU-A-2003235165

PCT Number PCT/JP03/04785

PCT Pub. Number WO2003/088225

Priority 2002-115329 17.04.02 JP; 2002-163416 04.06.02 JP

Filing date 15 April 2003

Wipo publication date 27 October 2003

G11B 007/005 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 007/24 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - Record carriers characterised by the selection of the material or by the structure or form

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