Patent application number | Description | Published |
20090003155 | OPTICAL INFORMATION RECORDING DEVICE, OPTICAL PICKUP, OPTICAL INFORMATION RECORDING METHOD AND OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording device, which emits a first beam to one side of an optical information recording medium and a second beam to the other side and forms a recording mark or a hologram by putting together the first and second beams, includes: a section that collects and emits the first beam to the recording medium; a section that moves a focal point of the first beam so that the focal point is positioned at a target depth and is aligned with a target track; a section that makes a diameter of the second beam around its focal point larger than a diameter of the first beam around its focal point; and a section that puts the focal point of the second beam at the target depth and moves the focal point of the second beam such that the second beam strikes the target track. | 01-01-2009 |
20090003176 | Information recording apparatus, information reproducing apparatus, information recording method, information reproducing method, and optical information recording medium - An information recording apparatus for recording information on a multi-layered optical information recording medium having a recording material, which has light reaction property and which changes quality due to heat generated by an irradiated light, and having an altered layer in which the recording material is already altered and a non-altered layer in which the recording material is not yet altered alternately existing in plurals is provided. The information processing device includes a light source for emitting a recording light having a predetermined wavelength; a focal position control unit for controlling a focal position of the recording light emitted from the light source; and an objective lens, arranged at a post-stage of the focal position control unit, for collecting the recording light; wherein the recording material at the focal position is altered through heat by the recording light to record information on the recording medium as a recording mark. | 01-01-2009 |
20090003177 | Information recording apparatus, information reproducing apparatus, information recording method, information reproducing method, and optical information recording medium - An information recording apparatus for recording information on a multi-layered optical information recording medium having a recording material, which changes quality according to light intensity of an irradiated light, and having an altered layer in which the recording material is already altered and a non-altered layer in which the recording material is not yet altered alternately existing in plurals is provided. The information recording apparatus includes a light source for emitting a recording light having coherency; a light path branching unit for branching a light path of the light into a first light path and a second light path; focal position control units for controlling focal positions of the light in the first and the second light path; and objective lenses for collecting the lights in the first and the second light path on the recording medium. | 01-01-2009 |
20090092034 | OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording medium includes: a recording area on which an interfering beam formed where a first beam and a second beam whose converging angle is smaller than that of the first beam overlap each other is recorded as a hologram, the first and second beams being emitted from the same light source with the first beam directed to one surface and the second beam directed to the other surface; a first base area that covers the recording area's one surface to which the first beam is emitted, and allows the first beam to pass therethrough; and a second base area that is made thicker than the first base area, covers the recording area's other surface to which the second beam is emitted, and allows the second beam to pass therethrough. | 04-09-2009 |
20090141618 | OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording medium includes a recording layer provided on a cured resin on which a recording mark is formed by the temperature rise around a focal point caused by absorbing a predetermined recording beam converged for recording of information according to the wavelength of the recording beam and from which the information is reproduced, when a predetermined reading beam is emitted for reproducing of the information, based on the optically-modulated reading beam, wherein the recording layer includes an activated recording area that has been activated as a result of being exposed to an activating beam whose light intensity is at a predetermined light intensity level. | 06-04-2009 |
20090147333 | HOLOGRAM MEDIUM MANUFACTURING METHOD, MASTER HOLOGRAM MEDIUM MANUFACTURING METHOD, RECORDING MEDIUM, AND HOLOGRAM MEDIUM MANUFACTURING APPARATUS - A hologram medium manufacturing method is disclosed. The hologram medium manufacturing method includes: disposing a first pair of master hologram media with a predetermined interval so that the first pair of the master hologram media face each other; forming a master hologram in the master hologram media by irradiating the first pair of the master hologram media with spherical wave light and reference light so that the spherical wave light and the reference light interfere with each other in the master hologram media, the spherical wave light and the reference light having a focal point between the first pair of the master hologram media; disposing a hologram medium between the first pair of the master hologram media; and forming a hologram in the hologram medium by irradiating the first pair of the master hologram media with the reference light. | 06-11-2009 |
20090252018 | HOLOGRAM LENS MANUFACTURING APPARATUS, HOLOGRAM LENS, METHOD OF MANUFACTURING HOLOGRAM LENS, INFORMATION RECORDING APPARATUS, AND INFORMATION REPRODUCING APPARATUS - A hologram lens manufacturing apparatus includes: a separation unit that separates a light beam emitted from a light source into a reference light beam and an irradiation light beam; an irradiation light irradiating unit that collects the irradiation light beam so as to have a focal point at a predetermined focal position, and irradiates a hologram recording element located on the way to the focal point with the irradiation light beam; and a reference light irradiating unit that irradiates the hologram recording element with the reference light beam under a predetermined irradiation condition to record an interference pattern occurring between the irradiation light beam and the reference light beam as a hologram. | 10-08-2009 |
20090316543 | OPTICAL PICKUP, OPTICAL INFORMATION REPRODUCING APPARATUS AND OPTICAL INFORMATION REPRODUCING METHOD - An optical pickup includes: a light source that emits first light; an objective lens that condenses the first light and allows it to irradiate a track having formed therein a recording mark for intercepting the first light in a uniform recording layer of an optical information recording medium; and a light receiving section that receives transmitted light which has transmitted through the track. | 12-24-2009 |
20100322062 | OPTICAL PICKUP AND OPTICAL DISC DEVICE - An optical pickup includes: a light source that emits a light beam; an object lens that focuses the light beam on an optical disc having a recording layer formed of a fluorescent recording material and a reflecting section adjacent to the recording layer, the recording layer generating, according to presence or absence of a recording mark representing information, a reproduction light beam having wavelength different from that of the light beam when the light beam is irradiated thereon from the light beam, and the reflecting section reflecting the light beam; a wavelength selecting element that separates, from the reproduction light beam, a reflected light beam reflected by the reflecting section of the optical disc and having wavelength equivalent to that of the light beam; and a reflected light detector that receives the reflected light beam separated by the wavelength selecting element and generates a position detection signal. | 12-23-2010 |
20110044156 | OPTICAL INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - An optical information recording medium including a recording layer that can record a large amount of information is manufactured using a simple system. A single recording layer is formed by bonding two optically transparent substrates on which the first photosensitive polymer and the second photosensitive polymer are spread such that the layers of the photosensitive polymers face each other. Furthermore, since the absorptivity of light in the recording layer increases as the focal point of light for information recording moves in a depth direction, information can be recorded without decreasing the recording transfer rate of the information. | 02-24-2011 |
20110096648 | OPTICAL DRIVE DEVICE AND TILT DETECTION METHOD - An optical drive device for performing information recording or reproduction of recorded information by formation of a mark by focusing a first light at a necessary position in a recording layer of an optical recording medium by an objective lens includes a position control unit configured to focus a second light on a reflection film, in which a position guide element of the optical recording medium is formed, through the objective lens and to enable the spot position of the second light to follow the position guide element based on the reflected light of the second light focused on the reflection film so as to control the position of the objective lens. The optical drive device further includes a first focusing unit, a first light-sensing portion, and a surface reflection light deviation amount detection unit. | 04-28-2011 |
20110134742 | PICKUP APPARATUS, OPTICAL RECORDING AND REPRODUCTION APPARATUS, AND RECORDING AND REPRODUCTION METHOD - A pickup apparatus includes a light source; a light separator; an object lens that concentrates the light which penetrated the light separator on the optical recording medium; a movable lens; and a light sensing element that receives the reflected light from the optical recording medium separated by the light separator, wherein a coma aberration generated by the transverse shift of the object lens is corrected by a coma aberration which is generated by the deviation of a spherical aberration generated in an optical path from the light source to the object lens and a spherical aberration generated in an optical path from the object lens to a light concentration position on the optical recording medium which are due to the transverse shift. | 06-09-2011 |
20110242951 | OPTICAL PICKUP, OPTICAL DRIVE APPARATUS, AND LIGHT ILLUMINATION METHOD - There is provided an optical pickup including: an optical-system having an object-lens illuminating a first light for information recording or reproducing on a recording layer as a target and a second light on an optical-recording medium including a reference plane having a reflection-layer and the recording-layer at a layer position different from that of the reference-plane and on which information recording is performed through mark formation, and a focus-aligned-position-adjusting unit adjusting a focus-aligned position of the first light through the object-lens by changing collimation thereof incident to the object-lens; and a focusing-mechanism driving the object-lens in a focusing direction, wherein, when a depth of focus λ/NA | 10-06-2011 |
20110317259 | MICROSCOPE AND FOCUSING METHOD - Disclosed herein is a microscope, including: an illumination optical system; a first image creation optical system; a second image creation optical system; an illumination-field-diaphragm focus adjustment section; and a characteristic-quantity computation block, wherein the illumination-field-diaphragm focus adjustment section adjusts the image creation position for the illumination field diaphragm on the basis of the characteristic quantity computed by the characteristic-quantity computation block. | 12-29-2011 |
20120163141 | OPTICAL DISK DEVICE, OPTICAL PICKUP, AND OPTICAL RECORDING MEDIUM - The present invention can properly correct spherical aberration. | 06-28-2012 |
20130010583 | OPTICAL PICK UP, OPTICAL DRIVE DEVICE, AND LIGHT IRRADIATION METHOD - The present invention relates to an optical pick, an optical drive device, and a light irradiation method capable of suppressing a generated amount of shift Δx of a spot position. | 01-10-2013 |