Matches 251 - 300 out of 420 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4879710 Optical disc protector and method for applying same  
A semi-permanent disc protector for shielding an optical disc against surface scratches. The disc protector comprises a transparent annular sheet of a cellulose triacetate film having an inner ring...
4877713 Preformatted optical recording card and method of producing the same  
An improved art of producing an optical recording medium by utilizing a photo-etching technique is disclosed. Pits pattern of address for guide groove and sector on each of tracks of optical...
4873679 Optical information recording disk and optical information recording disk apparatus  
An optical information recording disk and optical information recording disk apparatus which increase the recording capacity of data recorded on the disk, and are capable of fast recording and...
4871601 Optical information recording carrier  
An optical information recording carrier comprises an optical recording layer provided on a transparent substrate, a film coating layer laminated with out adhesion on said optical recording layer,...
4870429 Optical foam-spacer disk assembly  
An optical disk is provided which comprises two sheets of substrates; or two sheets of substrate and a reinforcing plate or a reinforcing rim; or one sheet of substrate and a reinforcing plate;...
4863832 Optical recording employing diacetylene compound and dye to change color and form pits  
An optical recording method is provided which comprises a step of irradiating light corresponding to recording information on the optical recording medium having a recording layer containing at...
4855992 Reversible optical recording medium with an optothermally deformable recording layer  
There is disclosed a bubble-mode data-rewritable optical disc, which has a transparent substrate and a recording layer, formed on the substrate, for storing data to be optically rewritable. The...
4852077 Optical data storage media with spatially variable energy absorptivity  
Optical data storage media of various technologies, including those with multiple layers of varying absorptivities of light as well as those which are grooved to facilitate tracking, are improved...
4852076 Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics  
An optical information recording and reproducing disc information has a substrate in the surface of which are formed signal recording grooves and cue signal recording pits. A light-absorbing thin...
4847827 Optical information recording disk  
An optical information recording disk is formed by a pair of disk-like substrates with an inner and an outer annular spacer member disposed therebetween. The inner spacer member supports an inner...
4842381 Electrochromic data recording systems  
An electrochromic data recording device such as a disc including at least one electrochromic zone (4) in and as a part of an electrical cell (2, 4, 5, 6, 7) for selectively supplying and...
4839207 Optical recording medium and process for producing the same  
Disclosed herein is an optical recording medium for recording informations by irradiating the optical recording medium with a laser beam to form a hole or a deformed part thereon, said optical...
4837130 Optical disk manufacturing method  
In an optical disk manufacturing method in which a first photo resist layer, an intermediate resin layer, and a second photo resist layer are formed on a substrate in the stated order, a resin...
4832456 Liquid crystal disc memory with circular grooves for auto-focusing of write-in beam  
An improved optical memory disc is disclosed which has a liquid crystal layer on which information is written by applying electric field. The liquid crystal layer is sectioned into a plurality of...
4825430 Erasable optical data storage medium having an embedded servo track and a subsurface recording interface  
An erasable optical data storage medium has an embedded servo track and a subsurface recording interface. An erasable recording structure having two dyed polymer layers is separated from the servo...
4821050 Optical information recording medium  
An optical information recording medium of two disc substrates, which are adhered directly or through a convex portion formed on at least one of the substrates or a spacer provided between the...
4819210 Optical information writing method  
An information writing method of an optical recording device selectively irradiates light on an optical recording medium, having a thin organic film containing donor and acceptor molecules, and a...
4812857 Optical information record disk  
The structure of an annular spacer adapted to be sandwiched between a pair of circular base plates in an optical information record disk of the air sandwiching type. The annular spacer has an...
4811331 Medium for recording digital information using an array of equally spaced micromirrors  
A digital recording medium formed of a thermoplastic substrate having an array of parallel rows of equally-spaced microscopic optically-alterable mirrors each supported by a mesa projecting from...
4802160 Optical disk substrate  
An optical disk substrate has a surface on which a pre-groove for light beam tracking is formed. Non-pregrooved regions on the substrate surface on which the pregroove is formed are subjected to...
4794560 Eraseable self biasing thermal magneto-optic medium  
A thermally written magnetic data storage medium retains desired domains of magnetization having field orientations representative of the data. A first magnetic layer retains one or more domains of...
4791044 Disk type information recording medium  
A disk-shaped information recording medium is provided in such a manner that at least one information bearing layer formed on a side of a pair of disk-shaped substrates, which substrates are...
4788678 Optical information recording media substrate  
An optical information recording media substrate made of a plane shaped molded object using thermo-plastic resin possessing optical anisotropy. A light beam is condensed in the direction...
4787077 Process for optically storing information using materials having a single phase in both the crystalline state and the amorphous state  
An optical storage system has an information containing film of a material which has a crystallization temperature between 100° C. and 400° C. and can be switched between the amorphous and the...
4783386 Use of anthracyanine and phenanthracyanine chromophores in optical information media  
Provided is an optical information recording medium and a method of recording information thereon. The information layer of the recording medium comprises an anthracyanine or phenanthracyanine...
4782477 Optical recording medium with fluorine resin adhesive  
A magneto-optical recording disk has a transparent resinous substrate with a pre-groove, and a metallic recording layer formed above the substrate. A transparent adhesive layer is provided between...
4780867 Method for erasably recording data by viscoelastic shear deformation  
An erasable optical data storage medium has a polymer dual recording layer including an expansion layer bonded to a retention layer, each of the layers dyed to selectively absorb light in...
4777102 Method and apparatus for electronic development of color photographic film  
A method for electronic "dry" development of latent images in conventional types of color photographic films comprising interrogating the film with a series of different color light beams, each...
4774702 Erasable optical memory employing a marmen alloy to effect phase-change erasing in a chalcogenide film  
A portion of a chalcogenide transformation film in a less reflective phase responds to a low energy laser beam writing pulse by transforming to a crystalline phase. A marmem alloy, secured to the...
4773060 Optical information recording device  
A film of a crystal - crystal phase transformation type optical recording alloy is formed on an insulating substrate. Information is erased from the alloy film by heating it with an expedient other...
4771347 Magneto-optical recording system  
Disclosed is herein a magneto-optical recording system comprising: preparing a magneto-optical recording medium comprising a magneto-optical recording layer and a bias magnetic field formed on a...
4760012 Signal recording disk  
A signal recording disk having an adhesive resin layer formed on a recording layer. The adhesive resin layer contains at least an epoxy group-containing compound, thereby preventing the recording...
4752554 Optical information recording medium  
The present invention relates to an optical information recording medium comprising a substrate, recording layer and protective layer, characterized in that said protective layer comprises, as the...
4740947 Dual surface optical memory disc  
A first optical memory disc and a second optical memory disc are fixed to each other by an adhesive layer so as to form a dual-surface optical memory disc. In a manufacturing step, an adhesive,...
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...
4737444 Optical information recording medium  
An optical information recording medium is disclosed, which comprises a plastic substrate; an undercoat layer formed thereon, comprising a condensate of a mixture of (1) at least one metal...
4731780 Optical recording element  
An optical recording element comprising an assembly of two parallel substrate plates made from a transparent synthetic resin and each comprising on their facing sides a recording layer which...
4731755 Thermal design for reversible phase change optical storage media  
Reversible phase change storage material is thermally isolated in a storage medium by means of grooves in the substrate and at least one layer of a thermally conductive dielectric material.
4731620 Information recording medium  
Improvement in an information recording medium comprising two disc-shaped substrates, said two substrates being combined with each other directly or via ring-shaped spacers by an adhesive, and a...
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...
4728724 Optical data storage medium comprising a chromophore/polymer information layer  
Provide is an optical data storage medium comprising a chromophore/polymer composition information layer, wherein the polymer and chromophore are chemically bound so as to improve...
4722595 Process for displaying optically readable information  
A process for recording, storing and displaying optically readable information on a support using a polymer mixture P as the information carrier, wherein P comprises at least two different,...
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...
4710911 Method for recording, reproducing and erasing optical information  
A read/write optical disk system for performing high-density recording, reproduction and erasing of information signals by utilizing reversible structural changes between the crystalline and...
4707820 Optical film and process for producing same  
An optical film comprises one or more layers at least one of which comprises Ta 2 O 5 and ZrO 2 , and a process for producing optical films comprising vapor deposition of a film comprising Ta 2 ...
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...
4686543 Information recording medium  
An optical information recording medium is described, comprising two disc substrates, which are adhered directly or through a convex portion formed on at least one of the substrates or a spacer...
4683562 Optical information recording disk  
An optical information recording disk comprising a reinforcement disk provided with circumferential banks of spacers and a pair of substrates sandwiching the disk to cover a information bearing...
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...
4672395 Optical fungicide-treated information recording and reproducing medium  
The combination of an optical information recording and reproducing medium and a container for storing said optical information recording and reproducing medium, at least one of said optical...
Matches 251 - 300 out of 420 < 1 2 3 4 5 6 7 8 9 >