Optical storage system employing a novel multi-layer optical...

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G11B 7/24 (2006.01) G11B 7/005 (2006.01) G11B 7/241 (2006.01) G11B 7/26 (2006.01)

Patent

CA 1200606

ABSTRACT OF THE DISCLOSURE OPTICAL STORAGE: SYSTEM EMPLOYING A NOVEL MULTI-LAYER OPTICAL MEDIUM An optical data storage system employing a data-modulated writing laser beam and a non-erasing reading laser beam of predetermined wavelength along with an improved optical medium comprised of multiple layers whose optical characteristics and thicknesses are chosen in conjunction with the writing and reading laser beams to provide an anti-reflection condition for unrecorded portions of the medium and a relatively high reflectivity for recorded portions of the optical medium. A preferred optical medium includes a highly reflective aluminum layer, a fluorinated hydrocarbon polymer spacer layer overlaying the reflective layer, a nucleation layer overlaying the spacer layer and also serving as a heat insulator therefor, and a gold absorber layer overlaying the nucleation layer.

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