Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Full Title

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) > 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 ) > Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Child Classifications

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• G11B 7/1353 Diffractive elements, e.g. holograms or gratings
• G11B 7/1356 Double or multiple prisms, i.e. having two or more prisms in cooperation
• G11B 7/1359 Single prisms
• G11B 7/1362 Mirrors
• G11B 7/1365 Separate or integrated refractive elements, e.g. wave plates
• G11B 7/1372 Lenses
• G11B 7/1381 Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops (G11B7/1353 - G11B7/1369 take precedence)
• G11B 7/1384 Fibre optics
• G11B 7/1387 using the near-field effect
• G11B 7/139 Numerical aperture control means
• G11B 7/1392 Means for controlling the beam wavefront, e.g. for correction of aberration
• G11B 7/1395 Beam splitters or combiners (G11B7/1353, G11B7/1356 take precedence )
• G11B 7/1398 Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section