Owner Matsushita Electric Industrial Co., Ltd.

Inventors Ishida, Takashi; Shoji, Mamoru; Nakamura, Atsushi

Agent Davies Collison Cave

Pub. Number AU-B-2002301755

Parent 46512

Filing date 31 October 2002

Wipo publication date 13 March 2003

Acceptance publication date 14 July 2005

G11B 007/095 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - specially adapted for discs, e.g. for compensation of eccentricity or wobble

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