Abstract:
An optical data storage system is contemplated, one employing a data-modulated writing laser beam (1) and a non-erasing reading laser beam of predetermined wavelength. Improved optical media for such systems are described, these characterized by multiple layers whose optical characteristics and thickness are chosen to accomodate a prescribed writing and reading energy and wavelength and so provide an "anti-reflection" condition for unrecorded portions of the medium and a relatively higher reflectivity for recorded portions. A preferred optical medium includes a highly reflective aluminum layer (c), a relatively transparent polymer spacer layer (d) overlying the reflective layer, and an optical absorber (recording) layer (e) overlying the spacer layer. Overcoating structure is specified in some detail; e.g., as a "soft pad" layer (e.g., fluoropolymer (f)) on the absorber (e), with a "hard" layer (e.g., radiation-cured acrylic (g)) laid over the "soft pad" as an outer protective overcoat. Also, the "spacer" (d) may be rendered as such a "soft pad".
Abstract:
An optical storage system is contemplated, one employing a data-modulated writing laser beam and a non-erasing reading laser beam of predetermined wavelength. Improved optical media for such systems are described, these characterized by multiple layers whose optical characteristics and thickness are chosen to accomodate a prescribed writing and reading energy and wavelength and so provide an anti-reflection condition (2-AR) for unrecorded portions of the medium and a relatively higher reflectivity for recorded portions. A preferred optical medium includes a highly reflective aluminum layer (213), a relatively transparent polymer spacer layer (214), overlying the reflective layer (213) and an absorber layer (215) overlying the nucleation layer (ST), the absorber layer (215) being an archival metal rendered in an island configuration, adapted to be so affected by the contemplated write beam as to "agglomerate" and better transmit the read beam. For instance a noble metal so rendered (with a pre-strike in many cases) has given good results.
Abstract:
Système de stockage optique de données utilisant un rayon laser d'écriture modulé par les données (12a) et un rayon laser de lecture non-destructive (12b) de longueur d'onde prédéterminée ainsi qu'un support optique amélioré (15) comprenant des couches multiples dont les caractéristiques optiques et les épaisseurs sont choisies conjointement aux rayons laser de lecture et d'écriture pour obtenir une condition d'anti-réflexion pour les parties non-enregistrées du support et une réflectivité relativement élevée des parties enregistrées du support optique. Un support optique préféré comprend une couche d'aluminium de grande réflexion (94), une couche d'espacement à polymère d'hydrocarbure fluoré (96) recouvrant la couche réfléchissante, et une couche en or d'absorption (98) recouvrant la couche d'espacement.
Abstract:
Système de stockage optique de données utilisant un rayon laser d'écriture modulé par les données (12a) et un rayon laser de lecture non-destructive (12b) de longueur d'onde prédérminée ainsi qu'un support optique amélioré (15) consistant en des couches multiples dont les caractéristiques optiques et les épaisseurs sont choisies en association avec les rayons laser de lecture et d'écriture pour obtenir une condition d'anti-réflexion des parties non enregistrées du support et une couche d'aluminium relativement très réfléchissante (94), une couche d'espacement d'un polymère d'hydrocarbure fluoré (96) recouvrant la couche d'espacement et également jouant le rôle d'isolant thermique de cette dernière, et une couche absorbante en or (98) recouvrant la couche de formation des germes de cristaux.
Abstract:
A medium for recording information is disclosed which is capable of providing high quality, high information density recording by thermal deformation. The medium comprises a layer (10) of amorphous material solvent-coated on a support (20) which layer is capable of being thermally deformed to form depressions (D) or holes surrounded by sharply defined ridges (R) when impinged upon by a high energy recording beam. The layer, which comprises a thermoplastic binder and an absorptive substance which absorbs energy at the wavelength of the beam, is less than 0.45 micron thick and has an absorption factor of 20 or greater at the wavelength of the beam.
Abstract:
The optical storage medium (10) comprises a substrate layer (11) with a land/grove structure, a recordable data layer (12) disposed on the substrate layer (11), and a section with control data for a recorder for the operation of the storage medium (10), wherein the recordable data layer (12) comprises a non-linear material for recording of data, and the control data provide an information for the recorder to use a laser with a light intensity for changing permanently optical properties of the a super-resolution near-field structure, when recording marks (14) on the recordable data layer (12), and wherein the recordable data layer (12) is utilized as a non-linear readout layer for reading of the data. The laser power of the recorder is in particular adjusted such, that the super-resolution near-field structure properties of the data layer (12) are destroyed. Suitable materials for the data layer (12) are for example phase change materials and semiconductor materials, e.g. InSb.
Abstract:
The optical disc (64) of the present invention includes a first/bottom translucent substrate (66) having generally planar opposed top (70) and bottom (68) surfaces. A second/top translucent substrate (78) has a top surface (82) incorporating a plurality of lenticules (84) formed therein, and a bottom surface(80) having an interlaced segmented lenticular image printed thereon. The method of the present invention provides that the top substrate(78) incorporating lenticular imagery is hot melt bonded or UV bonded through use of a bonding agent (76) to a bottom substrate (66) bearing recorded data and a metalized layer (74) for reflecting optical beams (72).
Abstract:
It is an object of the present invention to provide an optical recording medium containing a substrate, and a reflective layer, a second dielectric layer, a recording layer and a first dielectric layer which are disposed on the substrate in this order, wherein the recording layer contains a phase-change recording material containing any one of GeSbSnMn and GeSbSnMnGa, and the second dielectric layer contains an oxide of two or more elements of Nb, Si and Ta.