Patent application number | Description | Published |
20090028035 | OPTICAL HEAD DEVICE AND OPTICAL INFORMATION PROCESSING DEVICE - An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second interfering portion transmitting a second main region; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam. | 01-29-2009 |
20090034402 | Optical Head Device, Optical Information Device, Optical Disc Player, Car Navigation System, Optical Disc Recorder, and Optical Disc Server - In an optical head device including a light source for emitting a light of a predetermined wavelength; a collimator lens for converting a divergence degree of the light; a folding mirror for folding a direction of the light emitted from the light source; an objective lens for converging the light on a recording surface of an optical disc; a photodetector for receiving the light reflected at the recording surface of the optical disc, and converting to an electric signal; and an optical path adjustment unit for guiding the light emitted from the light source to the collimator lens and guiding the light reflected at the recording surface of the optical disc to the photodetector; a wavelength plate for polarizing the light reflected by the folding mirror is arranged on an actuator base between the folding mirror and the objective lens. | 02-05-2009 |
20090034403 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE - An optical pickup device which can more improve heat radiation efficiency and an optical disk apparatus including the optical pickup device are provided. The optical pickup device having a base ( | 02-05-2009 |
20090086330 | OPTICAL PICKUP, OPTICAL DISC DRIVE DEVICE, AND OPTICAL INFORMATION DEVICE - A small optical pickup of wide spherical aberration correction range is provided. The optical pickup includes a rising mirror for deflecting a light beam at substantially right angle and guiding to an entrance surface of the objective lens; a spherical aberration correction lens having one surface formed to a larger curvature than the other surface; a lens holder for holding the spherical aberration correction lens so that the surface of large curvature partially projects out towards the rising mirror side; a guide member extending in an optical axis direction of the spherical aberration correction lens sand having an end arranged to the side of a reflecting surface of the rising mirror; and a slidable part slidable along the guide member; wherein the projecting portion of the slidable part is configured to be fitted within the side surface of the reflecting surface of the rising mirror, and the projecting portion from the lens holder of the spherical aberration correction lens overlaps the reflecting surface of the rising mirror when the spherical aberration correction lens approaches the rising mirror the most. | 04-02-2009 |
20090138901 | OPTICAL PICKUP, OPTICAL ELEMENT, OPTICAL INFORMATION DEVICE, COMPUTER, OPTICAL INFORMATION MEDIUM PLAYER, CAR NAVIGATION SYSTEM, OPTICAL INFORMATION MEDIUM RECORDER AND OPTICAL DISK SERVER - An optical pickup includes: a laser light source which outputs an divergent beam having an elliptical far-field pattern; a beam shaping element having at least one cylindrical plane and which shapes the divergent beam outputted from the laser light source into an divergent beam having a prescribed shape in which at least the length in the major axis direction of the elliptical shape is shortened; a light collecting portion having a beam splitter which perpendicularly collects the divergent beam that is outputted from the beam shaping element and which has a prescribed shape on the recording surface of an optical disk, and a mirror or the like; and a light detecting portion The optical axis of the divergent beam is rotated so that the direction in which the major axis of the divergent beam having a prescribed shape is shortened conforms to the radial direction of an optical information recording medium. | 05-28-2009 |
20090147659 | OBJECTIVE LENS UNIT, OPTICAL PICKUP, AND OPTICAL INFORMATION DEVICE - An objective lens unit according to the present invention includes a first objective lens | 06-11-2009 |
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 |
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 |
20090310465 | OPTICAL HEAD AND OPTICAL INFORMATION DEVICE - An optical head according to the present invention includes: a first light source that emits light with a first wavelength; a beam splitter that splits the light emitted from the first light source into a first light beam traveling in a first direction and a second light beam traveling in a second direction different from the first direction; a first collimator lens for changing degrees of divergence of the first light beam; a first mirror that changes the traveling directions of the first light beam, of which the degrees of divergence have been changed; a first objective lens for converging the first light beam, which has had its traveling directions changed, toward a storage layer of a first optical disk; a mover that holds the first objective lens; a first photodetector that receives the first light beam reflected from the storage layer of the first optical disk and converts it into an electrical signal; a condenser lens for condensing the second light beam; and a second photodetector that receives the second light beam condensed by the condenser lens and converts it into an electrical signal. | 12-17-2009 |
20100103803 | OPTICAL HEAD, OPTICAL DISC DEVICE AND INFORMATION PROCESSING DEVICE - It is aimed to provide an optical head, an optical disc device and an information processing device capable of suppressing the amount of third-order astigmatism created upon recording or reproducing information on or from a multi-layer optical disc including at least three information recording surfaces. | 04-29-2010 |
20100128590 | Optical information medium measurement method, optical information medium, recording apparatus, and reproducing apparatus - An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step. | 05-27-2010 |
20100142348 | OPTICAL INFORMATION MEDIUM MEASUREMENT METHOD, OPTICAL INFORMATION MEDIUM, RECORDING APPARATUS AND REPRODUCING APPARATUS - An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step. | 06-10-2010 |
20100142356 | OPTICAL ELEMENT, OPTICAL HEAD, OPTICAL INFORMATION RECORDING AND REPRODUCTION APPARATUS, COMPUTER, IMAGE RECORDING DEVICE, IMAGE REPRODUCTION DEVICE, SERVER AND CAR NAVIGATION SYSTEM - The present invention provides a first light source ( | 06-10-2010 |
20100165823 | OPTICAL PICKUP DEVICE AND INFORMATION PROCESSOR - In an optical beam transmissive adjusting mechanism ( | 07-01-2010 |
20100208563 | INFORMATION RECORDING MEDIUM, REPRODUCING APPARATUS AND REPRODUCING METHOD - An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a). | 08-19-2010 |
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 |
20110019524 | OPTICAL HEAD AND OPTICAL INFORMATION DEVICE - An optical head comprises: a light source that emits a light beam; an objective lens that condenses, in the form of converging light, the light beam emitted by the light source, onto an information recording medium; a cylindrical lens onto which a reflected light beam that is reflected by the information recording medium is incident, and which generates astigmatism for forming a focus error signal; a light detector that receives the reflected light beam passing through the cylindrical lens; and a holder that holds the cylindrical lens and the light detector. The holder has a first main face and a second main face that extend in directions that intersect the optical axis of the reflected light beam. The cylindrical lens is bonded to the first main face and the light detector is bonded to the second main face. | 01-27-2011 |
20110032805 | INFORMATION RECORDING MEDIUM, REPRODUCING DEVICE AND REPRODUCING METHOD - An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a). | 02-10-2011 |
20110122744 | OBJECTIVE LENS UNIT, OPTICAL PICKUP, AND OPTICAL INFORMATION APPARATUS - An objective lens unit according to the present invention includes a first objective lens | 05-26-2011 |
20110122745 | OBJECTIVE LENS UNIT, OPTICAL PICKUP, AND OPTICAL INFORMATION APPARATUS - An objective lens unit according to the present invention includes a first objective lens | 05-26-2011 |
20110170389 | OPTICAL INFORMATION MEDIUM MEASUREMENT METHOD, OPTICAL INFORMATION METHOD, OPTICAL INFORMATION MEDIUM, RECORDING APPARATUS, AND REPRODUCING APPARATUS - An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step. | 07-14-2011 |
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 |
20120170431 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE AND INFORMATION PROCESSING DEVICE - An optical head device includes a light blocking region ( | 07-05-2012 |
20120201114 | OPTICAL PICKUP, OPTICAL RECORDING/REPRODUCING DEVICE, COMPUTER, OPTICAL DISK RECORDER, AND MINUTE SPOT FORMING METHOD - An optical pickup, an optical recording/reproducing device, a computer, an optical disk recorder, and a minute spot forming method that can enable light propagation with a high transmittance and can form a minute spot. The optical pickup includes a wavelength plate ( | 08-09-2012 |
20120294133 | OPTICAL PICKUP, OPTICAL DISK DRIVE DEVICE, OPTICAL INFORMATION RECORDING DEVICE, AND OPTICAL INFORMATION REPRODUCTION DEVICE - An optical pickup, an optical disk drive device, an optical information recording device, and an optical information reproduction device in which a reproduction signal, a focus error signal, and a gap error signal can be detected with high accuracy when information is recorded/reproduced on/from an optical information medium having a plurality of information recording layers. The optical pickup includes a focusing lens group ( | 11-22-2012 |
20130083645 | OPTICAL PICKUP, INCLINATION ANGLE DETECTION METHOD, OPTICAL INFORMATION DEVICE AND INFORMATION PROCESSING DEVICE - An optical pickup, an inclination angle detection method, an optical information device, and an information processing device capable of reliably and accurately detecting a relative inclination angle between an end face of a solid immersion lens and a surface of an optical recording medium are provided. A convergence position modifying unit modifies convergence states of a first beam and a second beam according to layers of an optical recording medium, a first optical detector includes a first light receiving section which receives the converged first beam and a second light receiving section which receives the converged second beam, and the first optical detector detects a relative inclination angle between an end face of a solid immersion lens and a surface of the optical recording medium based on a difference in quantities of received light between the first light receiving section and the second light receiving section. | 04-04-2013 |
20130152110 | OPTICAL DRIVE SYSTEM, CARTRIDGE AND DRIVE DEVICE WHICH ARE USED IN OPTICAL DRIVE SYSTEM, AND CLEANING METHOD FOR OPTICAL DRIVE SYSTEM - The present application discloses an optical drive system, including: a cartridge with a wall portion which defines a storage room to store a rotatable record medium with a light receiving surface scanned by light; and a drive device with a rotary driver, which rotates the record medium, an optical element, which irradiates the light, and a movement driver, which moves the optical element between inner and outer positions. The wall portion is provided with an outlet at the outer position. Air in the storage room is exhausted from the outlet by air flow resulting from rotation of the record medium. The outlet is divided into first and second opening regions by a movement track of the optical element. The first opening region is larger than the second opening region at an upstream position of the first opening region in a rotational direction of the record medium. | 06-13-2013 |
20140022882 | INFORMATION STORAGE MEDIA, TRACKING METHOD, AND OPTICAL INFORMATION APPARATUS - An optical disc ( | 01-23-2014 |
20140099052 | LIGHT MODULATOR, OPTICAL PICKUP, AND LIGHT MODULATION MODULE - A light modulator ( | 04-10-2014 |
20140146321 | DETECTION DEVICE, INFORMATION REPRODUCTION DEVICE, DRIVE DEVICE, SENSOR, AND DETECTION METHOD - The present application discloses a detection device including a light source configured to emit emission light, a scattering substance situated near a target object and configured to generate plasmon resonance between the scattering substance and the target object, a light guide portion configured to guide the emission light to the scattering substance and cause first reflected light, which is reflected from the scattering substance, and a detector configured to detect a state in phase of the first reflected light. | 05-29-2014 |
20140321252 | OPTICAL INFORMATION DEVICE, TILT DETECTION METHOD, COMPUTER, PLAYER, AND RECORDER - A photodetector outputs a first signal and a second signal corresponding to light amounts of the received first light flux and the received second light flux, first and second low band extraction circuits extract low band components of the first signal and the second signal, first and second high band extraction circuits extract high band components of the first signal and the second signal, a differential circuit calculates a difference signal between a high band component difference signal as a difference between the high band component of the first signal and the high band component of the second signal and a low band component difference signal as a difference between the low band component of the first signal and the low band component of the second signal, and a control signal processing section generates a tilt control signal based on the calculated difference signal. | 10-30-2014 |
20140341007 | OPTICAL INFORMATION DEVICE, CROSS-TALK REDUCTION METHOD, COMPUTER, PLAYER, AND RECORDER - A ratio Xm of an information item recorded on an adjacent track relative to an information item recorded on a main track included in a first signal obtained from a first light flux having passed through a center region ( | 11-20-2014 |
20140380342 | OPTICAL DISC APPARATUS, SHEET MEMBER, AND METHOD FOR CLEANING OBJECTIVE LENS - The present application discloses optical disc apparatus including: drive mechanism for rotating medium including processing surface to be subjected optical information process; housing for storing drive mechanism; tray mechanism for displacing medium between storage position, at which medium is stored in housing, and ejection position, at which medium is ejected from housing; at least one objective lens for condensing light onto processing surface of medium situated at storage position to perform information process; and first displacement mechanism for displacing at least one objective lens along processing surface between first position and second position which is more distant from rotational center of medium rotated by the drive mechanism than first position is. Tray mechanism defines at least one opening in position closer to second position than first position. | 12-25-2014 |