Matches 1 - 36 out of 36
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7136349 Multi-layer optical information recording medium with pits or grooves  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
7116631 Optical information recording medium manfacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
7038999 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Multi-layer optical information recording medium with pits or grooves  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
6973021 Multilayered optical information-recording media and process for manufacture thereof  
This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on...
6771587 Optical information recording medium, with plural information layers  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
6667952 Optical storage medium having a specific light transmitting layer for small laser beam and high linear velocity  
In an optical information medium comprising a supporting substrate, an information recording layer thereon, and a light-transmitting layer wherein a recording/reading laser beam enters the...
6611491 Optical recording medium having dual recording layers  
An optical information recording medium has a first information layer composed of at least three thin films, which is capable of reflecting a portion of incident light and permitting the passage of...
6472451 Radiation curable adhesive for digital versatile disc  
A UV-curable acrylate base adhesive composition for digital versatile discs and other substrates, a method for bonding verstile digital disc layers together with a UV-curable adhesive, and a...
6434095 Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
6314069 Apparatus and method for controlling a focused beam  
An apparatus and method is disclosed for focus control of a beam of radiant energy, wherein a detector of the beam has first and second outputs responsive to a position of the beam. A circuit is...
6226239 Optical information recording and reproducing apparatus for multiple layer recording medium  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
6205112 Multipurpose optical disc having different formats on opposing sides  
The present invention teaches an optical storage disc having a first side having at least one data encoded layer, wherein the at least one data encoded area contains a digital asset in at least one...
6134199 Closed loop servo operation for focus control  
An technique is disclosed for focus control of a beam of radiant energy, wherein a detector of the beam has first and second outputs responsive to a position of the beam. A circuit is coupled to...
6027594 Method of manufacturing optical information recording medium  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
5978331 Apparatus and method for focus control  
Control apparatus and method are disclosed for shifting focus on a multilayered optical medium using closed loop servo operation. The outputs of an astigmatic optical pickup are independently...
5978329 Technique for closed loop servo operation in optical disc tracking control  
The present invention allows the light beam of an optical disc storage device to radially move between different information tracks of an optical disc while the storage device tracking servo loop...
5917120 Resist printing on hydrophobic fibre materials  
The present invention relates to a process for printing hydrophobic fibre materials with disperse dyes, which comprises a procedure in which the fibre materials A) are dyed over the entire area or...
5764619 Optical recording medium having two separate recording layers  
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a...
EP0831168A2 Reserve printing of hydrophobic fibrous materials  
Printing hydrophobic fibre materials with disperse dyes comprises (a) dyeing or printing the whole area with a disperse dye and (b) printing in places with a paste containing disperse dye(s),...
5703847 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Technique for closed loop servo operation in optical disc tracking control  
The present invention allows the light beam of an optical disc storage device to radially move between different information tracks of an optical disc while the storage device tracking servo loop...
5689485 Tracking control apparatus and method  
An apparatus is disclosed for control of a beam of radiant energy, wherein a detector of the beam has first and second outputs responsive to a position of the beam. A circuit is coupled to the...
5276674 Optical recording medium having thin protective layer and two-dimensionally aligned code words and recording/reproducing apparatus employing the same  
An optical recording medium includes a substrate, a recording layer formed on the substrate and a transparent protective layer applied to the recording layer. By reducing the thickness of the...
EP0186689B1 OPTICAL INFORMATION CARRIER MAINTAINING ITS FLAT SHAPE  
Abstract not available for EP0186689 Abstract of corresponding document: US4980881 Optical information carrier comprising an optically transparent layer and a reflective layer adjacent to each...
5077725 Optical memory device and apparatus for manufacturing the same  
An apparatus for manufacturing an optical memory device, which comprises supplying rolls for continuously supplying a sheet-like substrate, a masking endless belt having a plurality of windows of...
4861699 Method of making a master disk used in making optical readable information disks  
A method of manufacturing an optical master disk, matrix derived from the master disk and synthetic resin information disk derived from the matrix. A method of manufacturing an optical master disk...
4777632 Data storage disk  
Data storage disks containing optically readable information made from a copolymer having low water absorption and good optical and mechanical properties, said copolymer being at least ternary and...
4751124 Information recording medium  
An information recording medium such as a magneto-optical recording medium is disclosed. The medium comprises two pieces of recording elements. Each element comprises a support and a recording...
4709000 Acrylic resins of low hygroscopicity  
Copolymers exhibiting low water absorption and having good optical and mechanical properties, suitable for use in making data storage disks containing optically readable information, said copolymer...
4680359 Molding compositions for optically readable information-storage media  
Copolymers, adaptable for use as molding compositions for optically readable data storage media, said copolymers being free of aromatic groups and comprising; (A) 5 to 95 percent by weight of at...
4636458 Storage disk made of para-methyl styrene  
Homopolymers of para-methylstyrene and copolymers thereof with monomers such as methyl methacrylate, which polymers exhibit very low water absorption in combination with good optical and mechanical...
4610903 Magneto-optical disk memory  
A magneto-optical disk memory comprises a magneto-optical recording medium constituted by a flexible substrate, and a recording thin film overlaid on the substrate. The recording thin film is...
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...
4569871 Material for optical disks  
A material for optical disks which comprises a polymer containing at least 20 wt. % of a structural unit represented by the formula ##STR1## wherein X is fluorine or alkyl having 1 to 6 carbon...
EP0144210A2 Cost-reduced optical disk record.  
A novel optical data storage medium is contemplated, one apt for data-modulated writing with a laser beam of predetermined energy and wavelength -- the embodiments here described being...
4517668 Optical disk with narrow guide tracks  
In an optical disk having an optical recording layer which is capable of having information thereon using a laser beam with information superposed by modulation there is formed a spiral protruding...
4417331 Method for manufacturing an optical disc  
In an optical disk having an optical recording layer which is capable of having information thereon using a laser beam with information superposed by modulation there is formed a spiral protruding...
Matches 1 - 36 out of 36