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 therefor

Classification Context

Section:

PHYSICS

Class:

INFORMATION STORAGE

Subclass:

INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

Related Keywords

Child Classifications

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• G11B 7/002 Recording, reproducing or erasing systems characterised by the shape of the carrier
• G11B 7/004 Recording, reproducing or erasing methods; Read, write or erase circuits therefor
• G11B 7/007 Arrangement of the information on the record carrier, e.g. form of tracks
• G11B 7/08 Disposition or mounting of heads or light sources relatively to record carriers
• G11B 7/12 Heads, e.g. forming of the optical beam spot or modulation of the optical beam
• G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material
• G11B 7/28 Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers using optical sensing means
• G11B 7/3 Rewritable carriers