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 2nd only +3 CPC CPC only CPC only
• G11B 7/002 Recording, reproducing or erasing systems characterised by the shape of the carrier since 2000 IPC+CPC Available in IPC and CPC
• G11B 7/004 Recording, reproducing or erasing methods; Read, write or erase circuits therefor since 2000 IPC+CPC Available in IPC and CPC
• G11B 7/007 Arrangement of the information on the record carrier, e.g. form of tracks since 1985 +9 CPC IPC+CPC Available in IPC and CPC
• G11B 7/08 Disposition or mounting of heads or light sources relatively to record carriers +3 CPC IPC+CPC Available in IPC and CPC
• 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 ) IPC+CPC Available in IPC and CPC
• 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) +2 CPC IPC+CPC Available in IPC and CPC
• G11B 7/28 Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers IPC+CPC Available in IPC and CPC
• G11B 7/3 Rewritable carriers since 2000 IPC only IPC only