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| Number | Title | Issue Date |
| 8298691 | Magnetic recording medium and magnetic recording and reproducing apparatus A magnetic recording medium is provided in which recording elements and concave portions have a clear difference in terms of magnetism at the boundaries therebetween, and which has favorable production efficiency. The magnetic recording medium includes a substrate; ... | 10/30/2012 |
| 8169742 | Magnetic recording medium, magnetic recording and reproducing apparatus, method for manufacturing magnetic recording medium, and method for checking magnetic recording medium A magnetic recording medium is provided, which has recording layers having concavo-convex patterns formed on both sides of a substrate and can easily distinguish one face from the other face. A magnetic recording and reproducing apparatus having the magnetic recordi... | 05/01/2012 |
| 8124255 | Magnetic recording medium and magnetic recording and reproducing apparatus A highly reliable magnetic recording medium is provided which has a recording layer formed in a concavo-convex pattern and wherein the recording layer is unlikely to cause a change in magnetic properties. The magnetic recording medium includes a substrate, a recordi... | 02/28/2012 |
| 8018804 | Method and apparatus to determine an optimum reproducing condition on an optical recording medium A method of determining an optimum reproduction condition of a first mark recorded on an optical recording medium that is smaller than a resolution of a pickup to reproduce the first mark. The method includes obtaining an optimum reproduction condition of a second m... | 09/13/2011 |
| 7944802 | Super-resolution optical recording medium and method for recording information on super-resolution optical recording medium A super-resolution optical recording medium has at least a recording layer and a super resolution layer on a substrate. In the recording layer, a minimum recording mark is formed with spaces within a beam spot of a laser beam in recording. The minimum recording mark... | 05/17/2011 |
| 7876665 | Optical recording medium and method for reproducing information from optical recording medium An optical recording medium includes a substrate, a first dielectric layer, a recording layer, a second dielectric layer, a super-resolution layer, and a third dielectric layer, which are provided in that order. The super-resolution layer is formed of a material con... | 01/25/2011 |
| 7796483 | Method for evaluating read stability of optical disc and information reproduction apparatus A method and apparatus for measuring the read stability of an optical disc are provided. Specifically, readout of the optical disc is repeated at each of at least two read laser beams powers being different from each other. A graph is drawn in which the inverses of ... | 09/14/2010 |
| 7791999 | Writing condition optimizing method and apparatus, and optical recording medium A method of optimizing a writing condition of an optical recording medium, including writing test pattern data with the writing condition on the optical recording medium, comparing an error pattern binary signal detected by reproducing the written test pattern data ... | 09/07/2010 |
| 7733762 | Super-resolution optical recording medium and method for recording information on super-resolution optical recording medium A super-resolution optical recording medium has at least a recording layer and a super resolution layer on a substrate. A recording mark with the size of a resolution limit or less and a space with the size of the resolution limit or less are formed in the super-res... | 06/08/2010 |
| 7719944 | Method and apparatus for recording information on optical recording medium with compensation for thermal effects in ultra-high-density optical recording and reproducing system A method for recording information on an optical recording medium in which a laser beam modulated into one or a plurality of write pulses with one or a plurality of write powers in accordance with target data to be written is projected onto a recording layer of the ... | 05/18/2010 |
| 7672217 | Optical recording medium and optical recording/reproducing method The present invention provides an optical recording medium that includes a recording layer composed mainly of an organic compound and can utilize blue-violet semiconductor laser light (390 to 420 nm in wavelength) as recording/reproducing laser light. The present in... | 03/02/2010 |
| 7646687 | Method for determining recording laser power for super-resolution optical recording medium and apparatus for recording information on super-resolution optical recording medium A method for determining recording laser power on a super-resolution optical recording medium, on which information is recorded on a super-resolution optical recording medium by irradiating a laser beam modulated into a recording pulse train according to recording d... | 01/12/2010 |
| 7573803 | Optical recording disc An optical recording disc includes a substrate, a third dielectric layer, a light absorption layer, a second dielectric layer, a decomposition reaction layer containing platinum oxide as a primary component, a first dielectric layer, and a light transmission layer. ... | 08/11/2009 |
| 7554894 | Data recording and readingout system In a data recording and readingout system in which data is recorded and readout, or is readout on, or from an optical recording medium 1 by irradiating a laser beam having a wavelength “λ” via an objective lens of a numerical aperture “NA” onto said ... | 06/30/2009 |
| 7457215 | Method for reproducing data and an apparatus for recording and reproducing data A method for reproducing data according to the present invention is adapted for reproducing data recorded in an optical recording disc including a multi-layered body formed by forming a decomposition reaction layer containing noble metal oxide as a primary component... | 11/25/2008 |
| 7440370 | Method for determining a reproducing power of a laser beam and an apparatus for recording and reproducing data A method for determining a read power of a laser beam includes a step of setting a power of a laser beam to a recommended recording power Pw′ and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution li... | 10/21/2008 |
| 7394744 | Reproduction apparatus and information recording medium testing apparatus A reproduction apparatus is capable of reproducing information recorded on information recording media including at least a super RENS recording medium. The reproduction apparatus includes: an optical head that receives laser light that has been reflected or transmi... | 07/01/2008 |
| 7247417 | Optical recording medium and optical recording/reproducing method The present invention provides an optical recording medium that includes a recording layer composed mainly of an organic compound and can utilize blue-violet semiconductor laser light (390 to 420 nm in wavelength) as recording/reproducing laser light. The present in... | 07/24/2007 |
| 7167439 | Multilevel optical recording medium with calibration signals It is an object of the present invention to provide a multilevel optical recording medium in which influence of variation in characteristics of a recording layer in a plane of the recording layer on reproduced data can be corrected The multilevel optical reco... | 01/23/2007 |
| 7132148 | Optical recording disk An optical recording disc is constituted by laminating a substrate, a reflective layer, a third dielectric layer, a light absorption layer, a second dielectric layer, a metal recording layer, a first dielectric layer and a light transmission layer in this order, and... | 11/07/2006 |
| 7102969 | Multi-level optical recording medium reproducing method and reproducing device A reproduction method for a multi-level optical recording medium according to the present invention rotates an optical recording medium, on which recording data has been recorded according to a multi-level recording method which sets several levels for light reflect... | 09/05/2006 |
| 7022393 | Optical recording medium An optical recording medium can be recorded at a high linear velocity of at least 10 m/s while maintaining an excellent light stability and favorable reflectance. A recording medium is constructed of a recording layer on a substrate, the recording layer including a ... | 04/04/2006 |
| 7014902 | Optical disc and method for manufacturing the same An optical disc is includes a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of a light-transmissive substrate and a hard coating layer having a thickness in the range of 1 to 5 μm on the other surface of the sub... | 03/21/2006 |
| 7008682 | Optical disc and method for manufacturing the same An optical disc is includes a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of a light-transmissive substrate and a hard coating layer having a thickness in the range of 1 to 5 μm on the other surface of the sub... | 03/07/2006 |
| 7008683 | Optical disc and method for manufacturing the same An optical disc is includes a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of a light-transmissive substrate and a hard coating layer having a thickness in the range of 1 to 5 μm on the other surface of the sub... | 03/07/2006 |
| 6905749 | Optical recording disk, method for making and using the same An optical recording disk includes at least a recording layer containing an organic compound containing a porphyrin system dye as a primary component and a light transmission layer which transmits a laser beam having a wavelength of 390 to 420 nm on a support substr... | 06/14/2005 |
| 6891790 | Optical recording medium, optical recording device and optical recording method A laser beam is directed to an optical recording medium such as a DVD-R to successively form thereon marks of a length corresponding to data with a spacing disposed therebetween. A Q value or the amount of reduction in time causes the rise time of laser irradiation ... | 05/10/2005 |
