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7522322 |
Apparatus for dental shade measurement
An apparatus for suitable for obtaining an image of a dental structure has an illuminator member placed proximate the area to be imaged. The illuminator member has a support structure (30) for...
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6837072 |
Rewritable optical recording medium and manufacturing method and apparatus therefor
A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to...
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6567351 |
Playback device with predetermined, random function for selection of data groups
Proposed is a playback device (1), especially a compact disc changer, which enables a random selection of data groups of recording media to be reproduced in succession. The playback device (1)...
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6502755 |
Optical data storage card
The optical data-storage card includes an optical data-storage medium layer supported on the card. The data-storage medium layer includes a plurality of data storage tracks for storing data...
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6438074 |
Optical recording medium manufacturing master recording apparatus
A master recording apparatus includes a revolving base (31) for revolving a substrate (1) coated with resist thereon, an irradiating mechanism (32), an elevator mechanism (33) for making the...
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5742567 |
Master optical disk recording apparatus
A master optical disk recording apparatus forms a train of pits on a recording layer of a master optical disk by a laser beam which is emitted from the laser light source and is modulated by an...
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5195083 |
Disc-shaped recording medium capable of recording data signals by means of light beam
A disc-shaped recording medium is used in a recording/reproducing apparatus in which a light beam is arranged to scan along a groove formed as a concentrical or spiral recording track, to record or...
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4821250 |
Process and apparatus for the recording of an information signal
A process and an apparatus are specified for recording a digital signal onto a recording carrier (4), in particular a signal for recording in compact disc data format, in which an engraving or...
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4678736 |
Optical recording media on which information is stored and method of making same
Optical recording media for storing information on which bits are formed by applying radiant energy to a polydiacetylene thin film supported by a substrate, so that the main chain structure of the...
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4519065 |
Metallized information carrying discs
Coded information bearing elements such as video discs may be produced from multilayered articles. The articles comprise a base having a thermoplastic, radiation curable resin on one surface and an...
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4148067 |
Modulated groove records with a thick metal layer and method for making same
A modulated groove record, such as a video disc, has a coating on a conductive layer bearing the modulated groove formed from the material of the layer. The material may be aluminium and the...
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4101907 |
Overcoat structure for optical video disc
An optical recording medium comprises a light reflecting material coated with a light absorbing material which is coated with a transparent barrier layer and overcoated with a relatively thick...
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4060831 |
Wideband electromechanical recording system
A system for recording signals in a disc master comprises an electromechanical cutterhead responsive to the signals and a signal processing means interposed between the cutterhead and a signal...
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3952146 |
Electron beam recording of wide-band signals on thermoplastic film
This invention concerns a method of recording wide-band signals on a thermoplastic film. The signal to be recorded is converted to an intensity modulation of a beam of electrons which is directed...
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3920930 |
Field effect recordings and semiconductor playback devices
A transducer apparatus wherein the source to drain current, or conductance, of an insulated gate semiconductor field effect device is modulated by the relative movement of the gate electrode or...
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3875024 |
METHOD OF MANUFACTURING A MASTER DESIGNED FOR THE REPRODUCTION OF RECORDS READABLE OPTICALLY BY DIFFRACTION
The present invention relates to the manufacture of masters intended for the reproduction of records which comprise a succession of diffractive elements arranged in accordance with a track which...
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3815146 |
RECORD-TURNTABLE ASSEMBLY AND METHOD OF MAKING
A record and turntable assembly featuring precise and repeatable angular and linear positioning of the record on the turntable, and positive rotary drive. The turntable is provided with three...
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3800099 |
STORING AND REPRODUCING INFORMATION AND CARRIER THEREFOR WITH ZONES OF DIFFERENT DEFORMATION CHARACTERISTICS
An information carrier for use in a signal reproducing system in which a pressure-responsive pickup bears against and compresses the carrier while traveling along an information-containing path on...
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3573845 |
IMPROVED ACOUSTIC IMAGE REPRODUCTION SYSTEM USING A PIEZOELECTRIC PRINTER AND ELECTROGASDYNAMICS
An apparatus and method for printing an image of a pattern of sound waves on a dielectric sheet, such as paper or the like, comprising the use of a space charge cloud of ionized ink from an...
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3569636 |
RECORDING AT LEAST TWO SIGNAL CHANNELS IN A COMMON GROOVE OF A MAGNETIC RECORD CARRIER
Method and means for recording two separate signal channels, pertaining, for example, to the video and audio information of a television signal, in the walls of a recording carrier groove in the...
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3195110 |
Electron beam recording
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2960578 |
Polarized vibration recording medium and system therefor
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2863711 |
Recording
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