Patent application number | Description | Published |
20090028027 | OPTICAL RECORDING MEDIUM, METHOD FOR RECORDING/REPRODUCING INFORMATION TO/FROM OPTICAL RECORDING MEDIUM AND APPARATUS FOR RECORDING/REPRODUCING INFORMATION - The present invention provides an optical information medium capable of suppressing the influence of reflection light from an unnecessary information recording face and effectively eliminating spherical aberration at the time of recording/reproducing information to/from a recording medium having a plurality of information recording faces. When reflectance of an information recording face is αh and transmittance between information recording faces is th, ah and th of the optical information medium are set so as to satisfy ((α(h−1) | 01-29-2009 |
20090040909 | Optical head device and optical information device - An optical head device is provided with a light source | 02-12-2009 |
20090073824 | Optical Disc Drive - An optical disk apparatus according to the present invention includes: a light emission section for emitting laser light; an optical system for irradiating the optical disk medium with the laser light; and an aberration control section for controlling aberration of the laser light. In one embodiment, the aberration control section repeatedly switches between a plurality of aberration setting states in a focus lock-in operation. In another embodiment, the aberration control section simultaneously sets a plurality of aberration setting states in a focus lock-in operation. As a result, a plurality of aberration setting states can be allowed to substantially coexist within a single optical system. | 03-19-2009 |
20090135687 | OPTICAL HEAD, CONTROL METHOD FOR OPTICAL HEAD, AND OPTICAL INFORMATION PROCESSING APPARATUS - An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback. | 05-28-2009 |
20090257340 | OPTICAL HEAD - To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc. | 10-15-2009 |
20090262630 | OPTICAL CONTROL DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE, OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL HEAD CONTROL METHOD - An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control unit for controlling the amount of the light emitted from the light source to the information recording surface on which information is to be recorded or reproduced, based on the recording state of an information recording surface disposed closer to the object lens than an information recording surface on which the information is to be recorded or reproduced. | 10-22-2009 |
20090268588 | OPTICAL HEAD, OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE, AND OPTICAL INFORMATION SYSTEM DEVICE - An object of the invention is to provide an optical element for use in an optical information recording and reproducing device or a like device for recording or reproducing information with respect to an information recording medium using laser light, wherein the optical element is a resin optical element capable of suppressing lowering in transmittance due to deterioration by irradiation of light having a high energy density, and maintaining a high transmittance for a long time. To realize the above object, used is an optical element made of a silicon resin cured material obtained by subjecting a silicon resin composition containing a silsesquioxane compound to a curing treatment. | 10-29-2009 |
20090303864 | OPTICAL RECORDING MEDIUM AND REPRODUCING DEVICE - An optical recording medium is provided with a plurality of recording layers, wherein the recording layers are formed such that all the spacings between two recording layers in all the combinations selected from the plurality of recording layers do not coincide with each other. Accordingly, the return of lights reflected by other layers to an optical head along the same optical path as reflected light from a readout layer during the reproduction can be avoided. Therefore, an optical recording medium, from which a good reproduction signal can be obtained, can be provided by suppressing the deterioration of a servo signal and a reproduction signal of a reproducing device due to a variation of interference fringes on a light receiving element. | 12-10-2009 |
20100110871 | OPTICAL INFORMATION RECORDING MEDIUM - The recording/reproducing quality of a multilayer optical information recording medium deteriorate not only due to interference from other layers caused by light converging on other information layers but also due to stray light converging on the surface of a protective layer and stray light that does not converge on other information layers but rather returns to an optical head through the same optical path as the reproducing signal. The thickness composition of intermediate layers ( | 05-06-2010 |
20100118685 | OPTICAL RECORDING MEDIUM, MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, INFORMATION RECORDING/REPRODUCING METHOD AND INFORMATION RECORDING/REPRODUCING DEVICE - An optical recording medium is capable of preventing a back focus at the face thereof and reducing the interference between beams reflected by each recording surface, thereby improving the quality of a servo signal and a reproductive signal. In a disk having (N-1) layers if N is a natural number (more than three), if a cover-layer thickness and intermediate-layer thicknesses are d | 05-13-2010 |
20100128102 | OPTICAL DISC LABEL PRINTER, THERMOSENSITIVE RECORDING PRINTER AND THERMOSENSITIVE RECORDING METHOD - A thermosensitive recording printer is provided with semiconductor lasers | 05-27-2010 |
20100143637 | Optical recording medium, and method for producing optical recording medium - An object of the invention is to provide an optical recording medium and a method for producing an optical recording medium that enable to improve the quality of a servo signal and a reproduction signal. The optical recording medium satisfies: t | 06-10-2010 |
20100149932 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An object of the invention is to provide an optical recording medium and an optical information device that enable to improve the quality of a servo signal and a reproduction signal. In the case where shape-wise thicknesses tr | 06-17-2010 |
20100214891 | OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE, COMPUTER, OPTICAL DISC PLAYER, AND OPTICAL DISC RECORDER - A first light source | 08-26-2010 |
20100254236 | OPTICAL HEAD DEVICE, AND RECORDING AND/OR REPRODUCING DEVICE - An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens | 10-07-2010 |
20110051585 | MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD - An object of the invention is to improve the quality of a servo signal and a reproduction signal. Shape-wise thicknesses tr | 03-03-2011 |
20110075534 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An object of the invention is to provide an optical recording medium and an optical information device that enable to improve the quality of a servo signal and a reproduction signal. In the case where shape-wise thicknesses tr | 03-31-2011 |
20110076436 | OPTICAL RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - An optical recording medium having three or more information recording layers reduces crosstalk caused by multi-reflected beams and improves signal quality. In the optical recording medium having three or more information recording layers, the refractive index of a plurality of intermediate layers disposed between adjacent information recording layers is greater than the refractive index of a cover layer disposed between a light incident surface and an information recording layer being the closest from the light incident surface. | 03-31-2011 |
20110078711 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An object of the invention is to provide an optical recording medium and an optical information device that enable to improve the quality of a servo signal and a reproduction signal. In the case where shape-wise thicknesses tr | 03-31-2011 |
20110170394 | MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD - An object of the invention is to improve the quality of a servo signal and a reproduction signal. Shape-wise thicknesses tr | 07-14-2011 |
20120011523 | OPTICAL RECORDING MEDIUM, MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, INFORMATION RECORDING/REPRODUCING METHOD AND INFORMATION RECORDING/REPRODUCING DEVICE - An optical recording medium (disk) capable of preventing a back focus at a face thereof and reducing the interference between beams reflected by each recording surface, thereby improving a quality of a servo signal and a reproductive signal. In a disk having (N−1) layers, if N is a natural number (more than three), and if a cover-layer thickness and intermediate-layer thicknesses are d1, d2, . . . dN, then a difference of 1 μm or above is set between the sum of di to dj and the sum of dk to dm for arbitrary natural numbers i, j, k, m (i≦j≦k≦m≦N). If refractive indexes are different from a standard value or different for each layer, then the thickness of each layer is converted based on a spread width of light according to the thickness. | 01-12-2012 |
20120011524 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An optical recording medium and an optical information device that improve the quality of a servo signal and a reproduction signal. In the optical recording medium, when shape-wise thicknesses tr | 01-12-2012 |
20120113787 | MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD - Shape-wise thicknesses tr | 05-10-2012 |
20120151508 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE - When information is recorded or reproduced on or from an optical information medium having three or more recording layers using blue light, interference by another layer light is reduced and, when information is reproduced from an optical information medium using red light, an S/N ratio is held excellently high. | 06-14-2012 |
20120213044 | MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD - Shape-wise thicknesses of a cover layer and first through (N−1)th intermediate layers of an optical recording medium having refractive indexes nr | 08-23-2012 |
20120213045 | MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, OPTICAL RECORDING MEDIUM, OPTICAL INFORMATION DEVICE, AND INFORMATION REPRODUCING METHOD - Shape-wise thicknesses of a cover layer and first through (N−1)th intermediate layers of an optical recording medium having refractive indexes nr | 08-23-2012 |