Matches 601 - 650 out of 699 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >
Match Document Document Title
4757492 Method for recording and reproducing information on or from an optical recording medium  
A method for recording and reproducing information on or from an optical recording medium, which comprises: recording information by illuminating light to the optical recording medium which is...
4737877 Structure to provide optical and capacitive contrast on magnetic recording disk  
A magnetic recording disk is formed on a rigid aluminum substrate coated with a polymeric dielectric layer. A thin film metallic position-indicating track is applied to the upper surface of the...
4729938 Optical disc base plate having a primer layer formed of an ultraviolet-cured resin composition  
An optical disc obtained by placing in parallel two optical disc base plates comprising a transparent substrate, a primer layer formed thereon, and a recording film formed thereon, or the...
4719613 Optical recording medium having a reflective recording layer including a resinous binder and a naphthalocyanine dye  
An optical recording medium comprising practically a naphthalocyanine dye represented by the following general formula (I): ##STR1## wherein M means a metal, metal oxide or metal halide, and --OR 1...
4718053 Optical information apparatus and method of recording and erasing information  
The present invention employs as a recording medium a metal or alloy which exhibits an intercrystalline transition before and after writing. In the present invention, two light beams of unequal...
4709363 Optically readable information disc having a reflection layer formed from a metal alloy  
An optically readable information disc having a supporting plate which on at least one side has a layer of synthetic resin in which an optically readable structure has been provided which is...
4707431 Optical information recording medium  
This invention relates to an optical information recording medium comprising a substrate provided at least with an underlayer and a recording layer thereon, said underlayer being prepared by curing...
4682321 Optical recording medium  
An optical disk for recording information, comprising a substrate and a plurality of thin film layers disposed on said substrate, each film having different optical extinction coefficient from that...
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...
4672599 Optical disc unit and method and apparatus for writing and/or reading information thereon  
An improved method of optically writing and/or reading high density information involves: (1) predeterminedly positioning a flat, uniformly thick, flexible, optical disc with respect to an axis of...
4667309 Erasure means  
Disclosed herein is a method of writing data into, reading data out of, and/or removing data from a state changeable chalcogen medium. According to the disclosed invention projected beam energy is...
4660175 Data storage device having novel barrier players encapsulating the data storage medium  
Disclosed is a data storage device having a chalcogendata storage medium encapsulated along at least one surface, and preferably both surfaces, by a dielectric barrier layer. The dielectric is...
4658388 Optical recording medium which includes a corrosion resistant film of a mixture of a carbide and a nitride  
An optical recording medium having a substrate, an optical recording layer formed on the substrate, and at least one film consisting of a carbide and a nitride and formed on the substrate.
4644519 Optical recording provided with a chalcogenide recording layer  
Optical recording element in which a transparent supporting substrate of a synthetic resin or provided with a coating layer of synthetic resin has a chalcogenide recording layer provided on one...
4635245 Frasable optical read/write data storage disc  
A temperature sensitive data storage element is disclosed, suitable for application in an erasable optical read/write data storage system. The data storage element includes an optical tuning film...
4615753 Process for making a video record disc  
A transparent record disc is provided which may appropriately have video signals optically recorded thereon, the record is composed of a lamination, for example, of pliant transparent plastic on a...
4606017 Optical recording disc  
Optical recording disc having successively a transparent substrate plate, a first layer of a formstable synthetic resin comprising an optically readable information track, a second thin layer of a...
4603099 Method for recording motion picture images and laser written data  
A method for recording laser written information on motion picture film includes creating a visual image on the film photographically. A laser records sound information on a direct-read-after-write...
4599718 Method for erasing a light recording medium  
A method for erasing a light recording medium comprising a thermoplastic resin having a number average molecular weight of 30,000 or less wherein a recording pit is refilled by using a light beam...
4592939 Method of rendering uniform coating on disks and product  
An optical data storage system is contemplated, employing improved optical disk media, these characterized by multiple layers, including various under layers, an optical absorber layer, and...
4587533 Information recording media  
An information recording medium for use with focused laser beams modulated with recorded information signals comprising a substrate having a recording layer composed of at least two layers, the...
4584259 Coated media for optical recording with acrylic overcoat  
An optical data 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...
4578684 Optical recording and information elements  
Optical recording elements having metal reflective layers which are coated on both sides with a ceramic overcoat are disclosed.
4577291 Thermo-optical data writing process and data medium for performing this process  
The invention relates to thermo-optical inscription or writing on a data support comprising an organic intermediate layer (2) covered by a metal layer (3). The invention relates to a writing...
4577306 Method for optically writing and/or reading information on optical recording elements  
A method for writing and/or reading information on an optical recording element, such as an optical disk, utilizes a recording element comprising a recording layer having physical and optical...
4572891 Method for recording medical data in two modes  
A laser beam scanner system records medical information on a direct-read-after-write optical data storage strip. The strip is adhered to a medium containing a picture, such as X-ray pictures,...
4565772 Process of using radiation-sensitive carrier body to form stamper structure and subsequent use as a stamper to make optical disks  
A radiation-sensitive carrier body directly utilized as a stamper has a glass substrate, a first highly adhesive layer securely adhered to the substrate, a radiation-sensitive layer which...
4556893 Optical recording medium of high sensitivity  
Optical recording medium having a laser-recordable light-absorbing layer which is a carbide of iron or chromium has surprisingly high sensitivity. High carrier-to-noise ratios are attained using a...
4554655 Optical data recording disc and system  
An optical data recording disc has a protrusion forming layer which is formed on a gas generating metal layer, and the gas generating metal layer, in turn, is formed on an optically polished disc....
4551828 Quadrilayer optical draw medium  
Quadrilayer optical DRAW medium which differs from prior trilayer optical DRAW media by having a thin triggering layer adjacent each of the optical spacer and light-absorbing layers. The triggering...
4550395 Holographic system for the storage of audio, video and computer data  
A rotating disc-shaped carrier upon which have been recorded audio, video or computer data in holographic form, a method for forming such a carrier, and an apparatus for reading such a carrier is...
4547876 Optical recording medium and information record and method of making same  
The invention comprises an improved optical recording medium and information record wherein the light sensitive layer comprises a tracking layer having one or more openings extending therethrough...
4532616 Method for optically encoding digital data on a substrate and the data record carrier formed thereby  
A method for optically encoding digital data (12) on a substrate (11) without timing or synchronization data to form a data record carrier (10) includes the steps of: selecting a track (14) path on...
4519064 Optical record disc  
An optical record disc is provided having a guide signal pit previously formed on a base plate for reading out a tracking information by a laser beam. A reflection film is coated on the base plate...
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...
4509162 High density recording medium  
A process for making a radiation-reflecting record carrier, such as a video disc, is provided on which video and/or audio information is stored in an optically readable track in which first...
4509161 Optically readable information disc provided with a reflective optical structure  
An optically readable information disc having a reflective optical structure which comprises a reflective layer which is composed of a nitride, carbide or boride of a transition metal selected from...
4503531 Optical disc  
An optical disc includes a pair of substrates, at least one of which has predetermined information pits formed on one surface. The two substrates are bonded with a hot-melt adhesive having (1) a...
4481620 Pregrooved optical-disk  
An optical-disk according to an embodiment of the invention is disclosed. The optical-disk has a transparent substrate which has a surface in which a tracking groove is formed and which is made of...
4478782 Erasable recording medium comprising a dimer acid polyamide resin  
Provided is an erasable recording medium and a method for recording and erasing same. The erasable recording medium comprises a thermally stable substrate and a polymeric layer deposited on the...
4477328 Optically readable information disk and method of manufacturing same  
The invention relates to an optically readable information disk, a method of manufacturing same, as well as a device for carrying out the method, in which the information disk which comprises an...
4470053 Protuberant optical recording medium  
An optical recording medium containing a light-absorbing film of a refractary material selected from the group, consisting of boron, borides of carbon, silicon, hafnium, niobium, tantalum,...
4463089 Reflective optical data storage and laser recording medium  
An improved reflective silver laser recording and data storage medium for direct read after writing, having a protective gold plating on the silver particles of the reflective surface. The gold...
4451915 Optical storage system employing a 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...
4450553 Multilayer information disc  
The invention relates to a multilayer information disc, in particular a video disc, which is read by laser light. The disc comprises at least two radiation-reflecting optical structures each having...
4448827 Optically readable information disc comprising an envelope of cross-linked synthetic resin  
An optically readable information disc having a carrier body of polycarbonate which on one side has an optically readable information track which is provided in the surface of the carrier body and...
4447899 Optical disc method, media and apparatus for writing and/or reading information  
An improved method of optically writing and/or reading high density involves: (1) predeterminedly positioning a flat, uniformly thick, flexible, optical disc with respect to an axis of rotation;...
4446549 Optically readable information disc and method of manufacturing same  
An optically readable information disc having a substrate plate which on at least one side comprises an information layer of a lacquer cured by irradiation for example by ultraviolet light, said...
4441179 Optical video disc structure  
A symmetrical video disc structure and method for making the structure are described. The video disc structure is symmetrical about a plane passing through a core member and equidistant and...
4440586 Method of manufacturing a die for duplicating plastics information carriers  
The invention relates to a method of reproducing plastics record carriers, in particular duplicating video records. According to the invention, a metal die is used which is provided with a...
Matches 601 - 650 out of 699 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >