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 (G11B11/00, G11B13/00 take precedence)

Child Classifications

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• G11B 2007/0003
• 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 (disposition or mounting of head elements within housing or with provision for moving of light source, optical beam or detector, irrelevant to the transducing method G11B7/08 )
• G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material (characterised by the arrangement of information on the carrier G11B7/007)
• G11B 7/28 Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers