Patent application number | Description | Published |
20080239922 | OPTICAL DISC APPARATUS, INFORMATION RECORDING METHOD, AND INFORMATION REPRODUCTION METHOD - An optical disc apparatus that records recording marks in a plurality of mark layers by irradiating predetermined light onto a disc-like volume type recording medium on the basis of information to be recorded is disclosed. The apparatus includes: a first focus position adjusting means for adjusting the position of a focus on which a first light beam focuses within the volume type recording medium, in the direction of an optical axis of the first light beam; a second focus position adjusting means for adjusting the position of a focus on which a second light beam focuses within the volume type recording medium, in the direction of an optical axis of the second light beam; a focus control means for controlling the first focus position adjusting means and the second focus position adjusting means; and a recording control means for forming the recording marks at the positions of respective focuses. | 10-02-2008 |
20080239924 | OPTICAL DISC APPARATUS AND METHOD FOR REPRODUCING INFORMATION - An optical disc apparatus reproducing information on the basis of a standing wave recorded on a disc-like volume type recording medium is disclosed. The apparatus includes: first focus position adjusting means for adjusting the position of a focus on which a first light beam focuses inside a recording layer inside the volume type recording medium in the optical axis direction of the first light beam; second focus position adjusting means for adjusting the position of a focus on which a second light beam focuses inside the recording layer in the optical axis direction of the second light beam; controlling means for controlling the first focus position adjusting means and the second focus position adjusting means; and first and second detecting means for detecting the first and second reproduction light beams. | 10-02-2008 |
20080316902 | OPTICAL DISC DEVICE AND CONVERGING POSITION CORRECTION METHOD - An optical disc device that irradiates an optical beam to an optical disc including a recording layer for recording information and a positioning layer provided with a track for identifying a recording position of the information on the recording layer, includes: objective lens that converges a predetermined positioning optical beam to adjust the optical beam to a desired track on the positioning layer and converges an information optical beam that shares an optical axis with the positioning optical beam on the recording layer; moving section that moves the objective lens in a tracking direction which is substantially orthogonal to the track to make a focal point of the positioning optical beam to follow the desired track; a detection section that detects a moving amount of the objective lens to the tracking direction; and correction section that corrects a converging position of the information optical beam in accordance with the moving amount. | 12-25-2008 |
20090010115 | OPTICAL-DISK RECORDING MEDIUM, PLAYING APPARATUS AND METHOD FOR SAME, AND RECORDING APPARATUS AND METHOD FOR SAME - In an optical disk, a substrate has main data recorded in the form of a combination of pits and lands on one side thereof, and at least a reflective layer and cover layer are stacked on the substrate to cover the pits and lands on the substrate. To the optical disk, sub data is recorded in the form of marks formed by irradiating writing-power laser light to the reflective layer. The marks are formed so that reading signal level will be raised where the marks are formed while it will be lowered where the marks are formed in a counterfeit disk produced based on an authenticated disk, namely, the reading signal level where the marks are formed is different in polarity between in the authenticated and counterfeit disks. Further, in a player for the optical disk, discrimination is made between the authenticated and counterfeit disks by detecting the sub data recorded in the optical disk and judging whether the value of the detected sub data has been read at a correct polarity. | 01-08-2009 |
20090052312 | RECORDING APPARATUS, REPRODUCING APPARATUS, RECORDING METHOD, REPRODUCING METHOD, AND RECORDING MEDIUM - A recording apparatus for recording data on a recording medium having at least one recording layer, includes a loading unit and a recorder unit. On the loading unit, the recording medium is capable of being loaded. The recorder unit is configured to cause the at least one recording layer a physical change to collectively record a plurality of pieces of data on the at least one recording layer of the recording medium loaded on the loading unit, in a thickness direction of the at least one recording layer, such that the physical change of the at least one recording layer is capable of being detected at one time when the recording medium is reproduced. | 02-26-2009 |
20090147660 | OPTICAL DISC APPARATUS, POSITION CONTROL METHOD AND OPTICAL PICKUP - An optical disc apparatus can make the focus of an information light beam converged by an objective lens agree with a target track of a target mark layer of an optical disc by appropriately predefining the distance between the focus of a servo light beam and that of the information light beam with regard to the direction of the thickness and a radial direction of the optical disc by means of the optical pickup of the apparatus and then operating for focus control and tracking control of the objective lens so as to make focus of the servo light beam converged by the objective lens agree with a reference track of a reference mark layer. | 06-11-2009 |
20090168632 | OPTICAL DISK APPARATUS, POSITION CONTROL METHOD, AND OPTICAL PICKUP - An optical disk apparatus appropriately adjusts the optical paths of a reference light beam and information light beam in an optical path forming section of an optical pickup, condenses the reference light beam and information light beam using an objective lens, and performs position control of the objective lens in the focusing and tracking directions so as to focus the reference light beam onto a reference track in a target mark layer, thereby focusing the focal point of the information light beam condensed by the objective lens onto a target track TG in the target mark layer. | 07-02-2009 |
20090189302 | METHOD FOR MANUFACTURING MICROLENS AND METHOD FOR MANUFACTURING SOLID-STATE IMAGE SENSOR - A method for manufacturing a microlens includes forming a microlens by pressing a microlens mold having a reverse shape of a microlens formed therein on a microlens-forming film formed on a substrate to transfer the reverse shape of the microlens to the microlens-forming film. The microlens mold is formed by irradiating an inorganic resist film which is formed on a mold substrate with exposure light by relative two-dimensional scanning, and etching an exposed region of the inorganic resist film to form the reverse shape of the microlens. The irradiation intensity of the exposure light is adjusted to correspond to the depth of the reverse shape of the microlens from the surface of the inorganic resist film on the basis of profile data of the reverse shape of the microlens. | 07-30-2009 |
20090219799 | OPTICAL PICKUP DEVICE AND RECORDING/REPRODUCING DEVICE - An optical pickup device has a near-field optical system having a numerical aperture of NA>1; a first light source emitting a first light having a first wavelength; a second light source emitting a second light having a second wavelength; an optical system multiplexing the first light and second light and irradiating the multiplexed light onto an optical recording medium having at least two recording layers; a first photodetector detecting the first light returned from the recording medium a second photodetector detecting the second light returned from the recording medium; a controller obtaining a signal corresponding to distance between the near-field optical system and the recording medium based on the returned second light, and obtaining a reproducing signal and a tracking signal of the recording medium and a focus signal corresponding to the recording layer based on the returned first light; and a focus position adjustment mechanism moving a focus position of the first light under control of the focus signal. | 09-03-2009 |
20090245065 | OPTICAL DISC DEVICE AND FOCUS CONTROL METHOD - A focus control section first performs a reference focus control process in which a reference optical beam is focused on a reference layer of an optical disc according to the result of receiving a reference reflection optical beam, and then switches from the reference focus control process to an information focus control process in which an information optical beam is focused on a mark layer of the optical disc according to the result of receiving an information reflection optical beam. | 10-01-2009 |
20090262633 | OPTICAL DISC APPARATUS AND OPTICAL DISC REPLAY METHOD - When an optical disc apparatus reproduces information from an optical disc, it converges a reading light beam emitted from an LED to substantially collimated light and projects it to the optical disc to cause it to be reflected by reflection surface thereof so as to make it become a reading reflected light beam. Then, the apparatus converges the reading reflected light beam by a mark layer selection lens, detects the reading reflected light beam passing through the target position by a detection region located at the confocal point of the target position and generates a detection signal. Subsequently, the apparatus recognizes the presence or absence of a recording mark based on the detection signal to reproduce the information. Thus, the apparatus can detect the state of the reading reflected light beam observed when it passes the target position and can recognize the presence or absence of a recording mark. | 10-22-2009 |
20090285059 | APPARATUS FOR INITIALIZING AND METHOD OF MANUFACTURING OPTICAL DISC, AND INITIALIZATION REFERENCE PLATE - An embodiment of the present invention includes rotating an integrated disc formed by temporarily fixing an initialization reference plate to an uninitialized optical disc that is an optical disc to be irradiated with a light beam of light having a predetermined or higher intensity to record information as a recording mark. The initialization reference plate has a reference part that reflects at least a part of a servo light beam of servo light intended for servo control. The reference part contains information that indicates the position of a track of the optical disc for the recording mark to be formed on, in the form of a track of pit-and-projection pattern. | 11-19-2009 |
20090296542 | OPTICAL DISC APPARTUS AND CORRECTION SERVO CONTROL SIGNAL GENERATION METHOD - An optical disc apparatus includes an objective lens that converges a light beam emitted from a light source and irradiates an optical disc having recording marks formed in a uniform recording layer with it, a detection signal generation section that receives a return light beam from the recording mark and generates a detection signal, a servo control signal generation section that generates a servo control signal representing relative displacement between the recording mark and a focus of the light beam from the detection signal and a servo signal correction section that generates a correction servo control signal by connecting peaks or neighborhoods of the peaks of servo control signals, the peaks being produced according to the recording marks. | 12-03-2009 |
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 |
20100027403 | OPTICAL DISC APPARATUS AND SIGNAL GENERATION METHOD - An optical disc apparatus includes a light separator configured to separate a light beam emitted from a light source into a main beam and a sub-beam, an objective lens configured to, when the light beam is condensed and irradiated to an optical disc having a uniform recording layer in which a track is formed by record marks, irradiate at least part of the sub-beam to an area where the main beam is not irradiated in a radial direction which is defined as a direction of radius of the optical disc, and a signal generating unit configured to generate a mark layer distance signal, representing a distance between a focus of the light beam and a mark layer to which the track belongs, based on a return light beam resulting from at least one of the main beam and the sub-beam, which has been irradiated to the track. | 02-04-2010 |
20100027574 | OPTICAL INFORMATION RECORDING DEVICE, OPTICAL PICKUP, AND METHOD FOR EMITTING LASER LIGHT - An optical information recording device includes a semiconductor laser for emitting laser light, a light irradiation section for collecting the laser light and irradiating an optical information recording medium with the laser light, and a laser controller for supplying the semiconductor laser with a laser drive current wave in pulse form. The laser drive current wave has an oscillation current value that causes a relaxation oscillation of the semiconductor laser. | 02-04-2010 |
20100046338 | OPTICAL DISC APPARATUS, FOCUS POSITION CONTROL METHOD AND RECORDING MEDIUM - An optical disc apparatus can highly accurately record a hologram representing information on or reproduce such a hologram from an optical disc. When recording information on an optical disc | 02-25-2010 |
20100165825 | OPTICAL RECORDING/REPRODUCING DEVICE - An optical recording and reproducing apparatus is provided for recording standing wave information on an optical recording medium and reproducing standing wave information from an optical recording medium. The optical recording and reproducing apparatus includes an optical head configured to separate a laser beam emitted from a light source ( | 07-01-2010 |
20100172228 | VOLUMINAL INFORMATION RECORDING MEDIUM, INFORMATION RECORDING APPARATUS, INFORMATION REPRODUCING APPARATUS , AND OPTICAL PICKUP - The present invention makes it possible to use an optical pickup in common with conventional optical disks. In a three-dimensional mark recording layer ( | 07-08-2010 |
20100195453 | OPTICAL DISC DEVICE AND FOCUS CONTROL METHOD - Disclosed is an optical disc device that is able to increase accuracy in reproducing information from an optical disc. The optical disc device | 08-05-2010 |