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8144568 Information recording medium, information recording apparatus and method, and information reproducing apparatus and method  
An information recording medium (100) is provided with (i) a read only area (ROA1 and the like) whereupon read only information is previously recorded by forming embossed pits; (ii) a data area...
8130628 Manufacturing method for optical recording medium, optical recording medium, optical information device, and information reproducing method  
Shape-wise thicknesses tr1, tr2, . . . , and trN of a cover layer and first through (N−1)-th intermediate layers of an optical recording medium having refractive indexes nr1, nr2, . . . , and nrN a...
8014262 Optical information recording medium  
An optical information recording medium includes a substrate having a through-hole provided at the central portion thereof and a guiding groove provided on a surface at the light-incident side; a...
8014261 Optically-readable disk with copy protection device  
An optically-readable disk includes a device that disrupts readability of the disk when the disk is spun at an angular velocity substantially greater than required to play the disk in its intended...
7995452 Thin optical data storage media with hard coat  
This disclosure describes thin optical media that may be compliant with conventional DVD drives. Unlike conventional DVDs, however, the described media does not include the non-information bearing...
7986611 High-density optical recording media and method for making same  
The present disclosure provides a high-density optical storage medium which comprises a substrate structure having a thickness of 1.0 mm or more and including one or more information layers, a...
7944806 Method for modifying optical path on optical recording medium having distortion regions  
Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by...
7944804 Optical disk recording method, optical disk device, program, and recording medium  
In an optical disk recording method adapted to record information on an optical disk by a light beam incident to the disk in one direction, the disk has a plurality of rewritable recording layers...
7916619 Optically-readable disk with copy protection device  
An optically-readable disk includes a device that disrupts readability of the disk when the disk is spun at an angular velocity substantially greater than required to play the disk in its intended...
RE42222 Reversible optival information-recording medium  
Phase-change type, reversible optical information recording medium, being possible for recording, reproducing, erasing, and rewriting of information, by use of a laser beam. This invention,...
7869328 Optical disk and optical disk reproducing device  
To provide an optical disk and an optical disk reproducing device capable of preventing sub information from being illegally copied and altered. An optical disk includes an optical disk substrate...
7858290 Information recording medium and method for manufacturing the same  
An information recording medium includes a substrate and an information layer formed on the substrate. The information layer includes a recording layer whose phase can be changed between a...
7859983 Optical disk and optical disk recording and reproducing device  
An optical disk includes a plurality of disk sheets which are laminated, and each of which has a recording face on one of the surfaces and a flat back surface, wherein the plurality of disk sheets...
7800993 Optical recording medium, recording method thereof and evaluation method of optical recording medium  
A recording method of an optical recording medium comprises irradiating the medium with a laser having m pulse sets each comprising a heating pulse and a cooling pulse, in which m is a natural...
7782746 Optical information recording medium and method for manufacturing same  
An optical information recording medium that has a simple structure and with which warpage is kept to a minimum even under environmental changes over a wide range, and a method for manufacturing...
7697407 Multilayer optical recording medium and method for recording information in multilayer optical recording medium  
A multilayer optical recording medium enabled to retain an ideal signal regenerating property in spite of accidental adhesion of finger mark or alien substance is provided. The multilayer optical...
7684309 Multi-purpose high-density optical disc  
An optical recording medium includes a first half-disc and a second half-disc. The first half-disc includes a substrate and an information layer (including a reflective layer) formed on a first...
7680025 Optical information recording medium, reproducing method thereof, and manufacturing method thereof  
Super-resolution technology was proposed for generating marks smaller than the optical resolution in order to record data at high density on the optical disk. However, the achievable high density...
7659049 Phase-change recording material used for information recording medium and information recording medium employing it  
A phase-change recording material used for an information recording medium utilizing a crystalline state as a non-recorded state and an amorphous state as a recorded state, which has the...
7601481 Multilayer phase-change information recording medium, and method for recording and reproducing using the same  
The object of the present invention is to provide a multilayer phase-change information recording medium comprises a substrate, and N layers of information layer (N represents an integral number of...
7583580 Optical recording medium as well as optical recording and reproduction method  
An optical recording medium illuminated by light from a light source as near-field light using a focusing lens whose numerical aperture exceeds 1 to perform recording and/or reproduction is...
7566523 Optical information-recording media and optical information-recording/reproduction apparatus  
Optical information-recording media comprise a first transparent substrate through which a laser beam enters, a first information-recording layer deposited on the first transparent substrate, a...
7542401 Birefringence characteristic measuring method, optical recording medium and optical information recording/reproducing apparatus  
Four types of optical systems, a polarization optical system including an objective lens having a high numerical aperture, a polarization optical system including an objective lens having a low...
7422838 Phase-change optical recording medium  
A phase-change optical recording medium is disclosed including a supporting substrate and the following contiguous layers formed on the supporting substrate in the order recited such as a first...
7420908 Optical recording medium  
An optical recording medium including two or more recording layers which are capable of transmitting at a high transmittance recording light or reproducing light for performing...
7406005 Optical recording medium, memory apparatus, and recording/reproduction method  
An optical recording medium having at least a recording film and a protection film disposed on a substrate is disclosed. The optical recording medium includes a plurality of recording tracks being...
7394751 Optical storage system optical storage medium and use of such a medium  
A description is given of an optical storage system comprising an optical storage medium (1) and an optical head device (6). The medium has a substrate (2), a recording stack (3) and an optically...
7385740 Hologram recording medium  
There is provided a hologram recording medium having: a recording layer at which a hologram can be recorded by illumination of writing light; and a protective layer provided on the recording layer...
7376073 Optical storage medium having distortion regions, and a method of modifying an optical storage medium to include distortion regions  
Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by...
7368222 Optical data storage media with enhanced contrast  
Disclosed is an optical data storage medium with enhanced contrast. The optical data storage medium includes a substrate having oppositely facing first and second surfaces. A first metal/alloy...
7370367 Security device and article incorporating same  
A compact disc (10) for a computer incorporates a security device for preventing non-authorized reading of data carried by the disc. The security device includes an LCD laser blocker (16) which is...
7368223 Multi-stack optical data storage medium and use of such a medium  
A multi-stack optical data storage medium for rewritable recording by a focused laser-light beam, the medium having a substrate with deposited on aside thereof: a first recording stack comprising a...
7352680 Optical recording medium having relation between reflection layer and pit length  
An optical information recording medium including a substrate, a light absorbing layer which is located overlying the substrate and in which marks are formed to store information and a light...
7341820 Optical information recording medium  
The present invention is an optical information recording medium comprising a substrate having disposed in an order thereon a recording layer, an interlayer, and a cover layer, wherein recording...
7335459 Phase-change optical recording medium  
A phase-change optical recording medium includes a phase-change optical recording film that permits reversible phase change between a crystalline phase and an amorphous phase upon irradiation with...
7294446 Digital analog recording using near field optical imaging  
A data storage device and method of making the storage device wherein a digital and analog image may be stored thereon. The storage device includes a photosensitive layer capable of retaining an...
7295508 Optical disk  
The present invention provides an optical disc which is constituted by a substrate, a recording layer, and a protection layer and is irradiated with a laser beam from the protection layer side. The...
7272107 Optical recording medium having super resolution layer  
A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed...
7245580 Optical recording medium having protective and/or adhesive layers, and method of manufacture  
An optical recording medium including a substrate having guide groove thereon; a first protective layer located overlying the substrate; a recording layer located overlying the first protective...
7241549 Information recording medium  
An optical recording medium configured with a light reflection layer; a first protection layer; a recording layer containing a phase-change material which changes between crystalline and amorphous...
7236450 Recording medium having resin substrate  
A recording medium including a resin substrate having a first thermal expansion coefficient, a center hole, a first surface, and a second surface opposite to the first surface, a recording layer...
7221644 Disc-shaped recording medium, disc driving device and disc producing method  
With the disc-shaped recording medium, or the disc manufacturing method according to the present invention, for both the single-layer disc and the multi-layer disc, a recording layer L0, which is...
7106676 Disc player system  
The present invention provides a disc player comprising one or more light sources that project a constant or pulsing light onto the upper portion of a disc being played by the disc player. If a...
7079479 Optical storage medium having an organic recording layer attached to a dielectric layer  
A dielectric part 4 comprising a nitride layer 7 and an oxide layer 8, laid one upon the other, is formed on a data-recording layer 3. A light-transmitting layer 5 is boned with adhesive to the...
7062784 Prevention of disk piracy  
A method for protecting data recorded on an original data storage medium against unauthorized copying includes receiving data encoded in accordance with an applicable recording standard, and...
7041430 Information recording media, manufacturing technique and information recording method  
Problem to be solved is that when an information recording medium is repeatedly subjected to recording of information several hundreds times, the atoms in a protective layer are diffused and...
7020780 Method apparatus and systems for producing and writing cipher keys, reproducing information with a cipher key, and for permitting reproduction of information with a cipher key, and permitting reproduction of information with a cipher key, and optical disc recorded with a cipher key  
Plural program information and a BCA (Burst Cutting Area) number of the optical disc 100 is previously recorded in the optical disc 100. A drive ID is stored in the nonvolatile memory 104a of the...
6988206 Prevention of CD-audio piracy using sub-code channels  
A method for protecting data recorded on an original storage medium against unauthorized copying. The data are encoded in accordance with Standard 908 of the International Electrotechnical...
6908725 Double-sided hybrid optical disk with surface topology  
An optical disk has a multi-layer tuned optical coating overlying both small bumps to store pre-recorded information and lands onto which information is written to and read. The optical coating...
6901043 Scratch-off material layer applied on optical recording media  
An optical recording medium having a scratch-off material layer includes a transparent substrate, a reflective layer formed on the transparent substrate, a protective layer formed on the reflective...
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