| Entries |
| Document | Title | Date |
|---|
| 20080198726 | Apparatus and method for recording an information on a recordable optical record carrier using oval spot profile - The present invention relates to a method and a corresponding apparatus for recording an information on a recordable optical record carrier ( | 08-21-2008 |
| 20080205240 | FOCUSING CONTROLLER AND METHOD THEROF FOR AN OPTICAL DISK DRIVE - A focusing controller and the method thereof for an optical disk drive. The focusing controller includes a filter, a coupler and a focus compensator. The filter filters out a high-frequency component of the track error signal and derives an adjusted signal, while the coupler eliminates the adjustment signal from the focusing error signal so as to generate a coupled signal. The focus compensator generates a focus control signal used for controlling a position of the pick up head of the optical disk drive according to the coupled signal during a focusing operation. | 08-28-2008 |
| 20080212450 | OPTICAL STORAGE MEDIUM HAVING DISTORTION REGIONS, AND A METHOD OF MODIFYING AN OPTICAL STORAGE MEDIUM TO INCLUDE DISTORTION REGIONS - Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the copying of media to another mass manufactured disc. Methods which cause—the copy process to become lengthy and inconvenient, or which produce copies that are significantly measurably different from the original and therefore be recognizable as copies, deter or prevent an unauthorized individual from making copies. This is accomplished by modifying the optical path of an optical medium to include regions of selective distortion. This, in turn, modifies the read operation of the data in the regions, which can be used to identify and authenticate the medium. | 09-04-2008 |
| 20080219129 | Filter For Optical Recording Medium, Optical Recording Medium, Method For Producing the Same, Optical Recording Method and Optical Reproducing Method - It is an object to provide filters for optical recording media capable of preventing diffuse reflection of informing and reference lights from reflective films of optical recording media and inhibiting noise therefrom without shifting the selective reflection wavelength even when the incident angle is variable, optical recording media of hologram type having the filters and capable of recording images with higher density over the prior art, methods for producing the optical recording media with higher efficiency and lower cost, and also optical recording methods and optical reproducing methods that utilize the optical recording media. In order to attain the object, provided are filters for optical recording medium, comprising a colorant-containing layer, wherein the colorant-containing layer comprises at least one of pigments and dyes, and a cholesteric liquid crystal layer is disposed on the colorant-containing layer, and also optical recording media of hologram type comprising the filter. | 09-11-2008 |
| 20080247297 | Optical pickup - An optical pickup includes: a slide base, having: a first surface; and a second surface; a first substrate fixed to the first surface; a standing frame disposed on the second surface; a second substrate facing the standing frame; a laser diode operable to emit a laser beam to the disk and disposed in the standing frame; an optical, element supported by the second substrate and adapted to receive a reflected beam; a flexible flat cable. The flexible flat cable is bent so that one end portion of the flexible flat cable is connected to the second substrate. A curved portion is formed with a slit elongated in a longitudinal direction of the flexible flat cable and defines an outer portion and an inner portion. A width of the inner portion is narrower than a width of the outer portion. | 10-09-2008 |
| 20080253259 | Optical Device With Wavefront Modifier - An optical device comprises a wavefront modifier for introducing a wavefront modification in a radiation beam. The wavefront modifier comprises a first optical element ( | 10-16-2008 |
| 20080253260 | PHOTODETECTION DEVICE AND OPTICAL DISK DEVICE - A photodetection device is provided with a photoelectric converter portion that converts light to electric current, an electrical current/voltage converter portion, including a feedback circuit that returns at least part of the output to the input side, that converts the electrical current received from the photoelectric converter portion to a voltage corresponding to the resistance value of the feedback circuit and outputs the voltage, where the feedback circuit includes a first MOS transistor that allows the resistance value to be varied in accordance with the gate voltage. | 10-16-2008 |
| 20080253261 | Optical Pickup Having Aberration Correction - An optical pick-up unit is suitable for scanning a first type of record carrier having a first information density and at least a second type of record carrier, the second type of record carrier having a second information density different from the first information density. The optical pick-up unit comprises a first radiation source ( | 10-16-2008 |
| 20080259766 | Optical Pickup Actuator and Optical Scanning Device - An optical pickup actuator for low building height includes a suspended lensholder ( | 10-23-2008 |
| 20080298209 | FOCUSING CONTROL METHOD FOR READING/WRITING OPTICAL DISC - An optical reading/writing apparatus has an optical head that includes a collimator and a lens. For efficient and reliable focusing control for writing an empty optical disk, calibration of focus offset and spherical aberration is executed by setting a boundary and performing data-reading in an OPC area only with combinations of focus offset and spherical aberration within the boundary. Accordingly, an optimum combination of focus offset and spherical aberration is determined for focusing compensation in subsequent writing operation of the empty disk. | 12-04-2008 |
| 20080304393 | Resin Composition And Use Thereof - Provided is a resin composition suitable for an optical element in which the moldability, thermal resistance, mechanical strength, and low birefringence are not impaired, the deterioration is hardly generated although the laser light nearby the UV is used, change in the optical properties during the use are extremely small, particularly the light transmittance is maintained high, and a foreign substance is hardly deposited on a surface of the molded product such as an optical element, also provided is an optical element obtained by molding the resin composition, and an optical pickup device using the optical element. The thermoplastic resin composition contains the polymer having a specific structure and two kinds of specific optical stabilizers in a specific mass ratio among a hindered amine light stabilizer having the molecular weight of | 12-11-2008 |
| 20080316898 | Confocal Optical System Aperture Position Detector, Confocal Optical System Aperature Position Controller, Optical Head, Optical Information Processor, and Confocal Optical System Aperture Position Detecting Method - In a confocal optical system provided with a light source | 12-25-2008 |
| 20080316899 | VERY SMALL SPOT-SIZE LIGHT BEAM FORMING APPARATUS - A very small spot-size light beam forming apparatus of the present invention comprises: a conductive film for generating a surface plasmon when an inputted light is applied thereto: a plurality of nano projections, each connected to the conductive film at one end, for receiving a portion of the surface plasmon, and outputting a plurality of input surface plasmons, respectively, from the other end of each of the plurality of nano projections, the other end of each of the plurality of nano projections having a diameter smaller than a wavelength of the inputted light; a coupling unit, connected to the other end of each of the plurality of nano projections, for receiving and coupling the plurality of input surface plasmons, so as to generate a coupled surface plasmon; and a negative-refractive-index lens, connected to the coupling unit and having a negative refractive index, for receiving a near-field light generated due to the coupled surface plasmon, and collecting the near-field light on a recording surface of the optical information storage disk, and a near-field light obtained through collection on the recording surface has a diameter smaller the wavelength of the inputted light. | 12-25-2008 |
| 20090003182 | OPTICAL DISC APPARATUS WITH OPTICAL HEAD UNIT - According to one embodiment, an APC photodetector accepts a light beam branched from a light beam toward a recording medium by a branching mirror and detects intensity of a light beam supplied from a light source, a light quantity adjusting element adjusts the intensity of the light beam, and the intensity of the light beam incident to the APC photodetector is changed in a continuous manner or a stepwise manner by the light quantity adjusting element. Therefore, when the single APC photodetector detects recording and reproducing light beams, the recording and reproducing light beams can fall within a dynamic range of the APC photodetector. | 01-01-2009 |
| 20090010135 | Optical Information Recording Medium, and Recording Method and Manufacturing Method Thereof - To provide an optical information-recording medium that can easily record information at high density and has excellent durability at low cost. | 01-08-2009 |
| 20090016193 | Optical Pickup Apparatus - A light blocking unit includes a plate-like member which is different from a housing member, and a light blocking portion formed on the plate-like member, for blocking light. A light detector has a light receiving portion for receiving light which is partitioned into four divided regions, by a Y-axis-wise parting line and an X-axis-wise parting line in X-Y coordinates, and outputs photoelectric output signals for the respective divided regions in accordance with intensity of the light received by the respective divided regions of the light receiving portion. Of light beams emitted from a polarization beam splitter, a part of the light beams are blocked by the light blocking unit while the other part of the light beams are not blocked and thus emitted to the light detector excluding a region defined by two sides parallel to the parting lines. | 01-15-2009 |
| 20090022033 | FOCUS CONTROL FOR A MEDIUM SCANNING SYSTEM - An optical disc device and a method are for scanning a medium via a beam of radiation while focusing the beam, in particular for scribing a visible label on a record carrier that has a label side provided with a radiation sensitive layer for creating the visible label. The device has a head for providing the beam and a detector for generating a detector signal (CA) from radiation reflected from the medium. A focus system is provided for generating a focus control signal for focusing the beam of radiation to a spot on the medium. A focus excitation signal ( | 01-22-2009 |
| 20090022034 | OPTICAL HEAD DEVICE AND METHOD OF ADJUSTING CHARACTERISTIC OF OPTICAL HEAD DEVICE - In an optical head device having a laser light source, an output adjusting member for adjusting the output of laser light emitted from the laser light source and a frame for supporting the laser light source and the output adjusting member, the output adjusting member has an adjusting circuit board for adjusting an electrical resistance value, and a plurality of circuits on which chip resistors and short lands are connected to one another in parallel are connected in series. | 01-22-2009 |
| 20090028033 | Objective optical element for optical pickup device, optical element for opitcal pickup device, objective optical element unit for optical pickup device and optical pickup device - An optical element for optical pickup device is provided with an optical path difference providing structure which provides a substantial phase change to a light flux having a predefined wavelength. The optical path difference providing structure is provided with a step portion having a smaller step difference than the predefined wavelength in an optical axis direction. | 01-29-2009 |
| 20090046561 | OPTICAL PICKUP DEVICE - It is an object of the present invention to maintain a light flux separating unit in a stable state with a high positioning accuracy relative to a physical deformation when the light flux separating unit is attached or a great temperature change after the light flux separating unit is attached, in an optical pickup device including in a casing a projection optical system, a light receiving optical system and the parallel flat plate shaped light flux separating unit that separates a light flux advancing in the light receiving optical system from a light flux advancing in the projection optical system. In the present invention, the light flux separating unit | 02-19-2009 |
| 20090052303 | Objective optical element and optical head apparatus - Two optical discs used with a laser light having the same wavelength but having different substrate thicknesses can be handled by a single optical disc apparatus and a multilayer optical disc can also be reproduced. A refractive lens unit and liquid crystal elements are provided so as to condense laser light on an optical disc having a thin substrate thickness with a first NA and to condense laser light on an optical disc having a thick substrate thickness with a second NA smaller than the first NA. The refractive lens unit is designed such that the amount of RMS wavefront aberration is minimized with respect to an intermediate substrate thickness between the two optical discs in the range of the second NA; and the RMS wavefront aberration is 0.05λ or less with respect to the substrate thickness of the optical disc in an area outside the second NA. A liquid crystal element for compatibility corrects spherical aberration due to the difference in substrate thickness between the two optical discs. A liquid crystal element for multilayer corrects spherical aberration based on layer selection of a multilayer optical disc. | 02-26-2009 |
| 20090059765 | OPTICAL DISK DEVICE AND OPTICAL DISK DISCRIMINATION METHOD - According to one embodiment, the invention provides an optical disk device having an irradiation section which applies a laser beam to an optical disk, a detection section which receives a reflected light emitted from the irradiation section and reflected from the optical disk to output a detection signal, and a discrimination section which performs focus search using the irradiation section and the detection section and determines whether the optical disk is a triple layer optical disk on the basis of the detection signal upon performing focus search. | 03-05-2009 |
| 20090059766 | BEAM IRRADIATION DEVICE AND LASER RADAR - A beam irradiation device includes a light source for emitting laser light, an actuator for displacing a propagation direction of the laser light in accordance with a control signal, and a scan expansion lens for increasing a swing width of the laser light to be generated by the actuator. A spectral element is arranged between the actuator and the scan expansion lens. The spectral element allows at least a part of the laser light to be incident from the actuator to transmit, and reflects at least a part of the laser light to be incident from the scan expansion lens. The beam irradiation device further includes a light detector for receiving the laser light to be reflected on the spectral element to output an electrical signal. | 03-05-2009 |
| 20090067313 | INFORMATION-RECORDING MEDIUM AND OPTICAL INFORMATION-RECORDING/REPRODUCING DEVICE - An information-recording medium having a substrate and a recording part formed on the substrate allowing three-dimensional formation of recording pits, the recording part, comprising multiple recording layers, in which the recording pits are formed with a converged recording light at a wavelength of λ | 03-12-2009 |
| 20090103418 | OPTICAL DISK MEDIUM, INFORMATION RECORDING METHOD, AND OPTICAL DISK DRIVE - Provided are an optical disk drive and a disk format necessary for the optical disk, which are capable of eliminating or reducing a problem of reduction in an effective transfer rate attributable to track jumps caused at a certain interval when performing recording and reproduction of multiple tracks in parallel by using multiple beams, and thereby achieving a high transfer rate. A block constituting a recording unit is divided into sub-blocks, and the sub-blocks are arranged in a radial direction of a disk. Meanwhile, an optical disk drive includes a means for irradiating a disk with multiple light spots, a means for pulse modulating the spots by using the same frequency and different phases, and a means for receiving light from the spots reflected by the disk by using a single photodetector, and separating the reflected light into independent lines of signals in terms of a time domain. | 04-23-2009 |
| 20090103419 | Optical Pickup Device, Optical Information Recording and Reproducing Device and Design, Method of Optical Element - In order to provide an optical pickup device, an objective optical element and an optical information recording and reproducing device that can properly record and/or reproduce information with three different recording densities and that can be realized with a simplified structure and at low cost, the optical pickup device is comprised of an optical element, the construction of which is stacked with first, second and third basic structures to make different optical lengths. | 04-23-2009 |
| 20090122685 | INFORMATION RECORDING AND/OR REPRODUCING APPARATUS HAVING TWO PHOTODETECTORS TO CONTROL THE LIGHT INTENSITY OF TWO LIGHT SOURCESWITH DIFFERENT WAVELENGTHS - An apparatus for effecting at least one of recording and reproducing information includes first and second light sources having light intensity and for emitting a light beam having an emission wavelength different from each other, first and second photodetectors capable of generating an output, an optical system configured to guide a light beam emitted from the first light source to a recording medium and to guide a light beam reflected from the recording medium to the first photodetector, a separating optical element configured to guide a light beam emitted from the first light source to the second photodetector, the second photodetector receiving the light beam and generating an output based on the received light beam, and a control circuit for receiving the output generated by the second photodetector, and being configured to control the light intensity of the first light source based on the output of the second photodetector. | 05-14-2009 |
| 20090141614 | OPTICAL PICKUP - An adhesive positions a beam shaping element in such a manner as to satisfy the following relational expressions (1) and (2): | 06-04-2009 |
| 20090147656 | OPTICAL PICK UP AND OPTICAL DISC DEVICE - An optical pickup according to the present invention includes: a light source | 06-11-2009 |
| 20090147657 | Optical pickup device and objective lens used in the same - An optical system has an optical functional surface including a common region used for conducting information recording and/or reproducing for both of a first optical information recording medium and a second optical information recording medium. The common region comprises a refractive surface of an imaginary basic aspherical surface and a optical path difference providing structure in which plural ring-shapes zones are separated around the center of an optical axis and neighboring ring-shaped zones are displaced to each other in a direction of an optical axis so as to cause an optical path difference obtained by multiplying a predetermined wavelength λs (λ | 06-11-2009 |
| 20090161520 | OPTICAL ARRANGEMENT - An optical system is described for scanning optical record carriers of different types. The optical system includes a compensator having a number of optical elements (NPS | 06-25-2009 |
| 20090196147 | Optical pickup apparatus - An optical pickup apparatus for information recording and/or reproduction on different optical information recording media with compatibility among these media, the optical surface of a first objective lens and the optical surface of a second objective lens are formed only of a refractive surface. The second objective lens is used in common for the first light flux with a wavelength of λ | 08-06-2009 |
| 20090196148 | MASTER RECORDING APPARATUS AND MASTER RECORDING METHOD - According to one embodiment, the invention provides a master recording apparatus and method which can form a pit having a symmetrical pit shape with excellent reproducibility. An embodiment of the invention is a master recording apparatus where a resist film on a master for an optical disk is irradiated with irradiation light from a semiconductor laser to record information on the resist film, where the resist film is formed as an inorganic resist film, and means for outputting the irradiation light from the semiconductor laser as a short pulse laser with a pulse width between 200 ps and 1 ns is provided. | 08-06-2009 |
| 20090201785 | OPTICAL PICKUP AND OPTICAL DISC DRIVE - An optical pickup has a semiconductor laser device that can emit laser beams with different wavelengths. A beam splitter and objective lens direct the emitted beam onto a rotating optical disc. Reflected light returns through the objective lens and beam splitter to a photodetector. A pair of liquid crystal elements on the optical path from the optical disc to the photodetector have controllable lens functions acting in different directions to produce an adjustable astigmatic effect that enables the photodetector to generate a focus error signal with a linear range appropriate for the type of optical disc, the number of signal layers in the optical disc, and the spacing between the layers. | 08-13-2009 |
| 20090201786 | OPTICAL ELEMENT AND OBJECTIVE OPTICAL SYSTEM - There is provided an optical element for an objective optical system of an optical information recording/reproducing device. The objective optical system is configured to satisfy conditions: λ<500; NA≧0.7; and f≦1.0, and at least one of surfaces of the optical element includes a diffraction structure defined by an optical path difference function φ(h): | 08-13-2009 |
| 20090245069 | RECORDING MEDIUM AND RECORDING SYSTEM - Disclosed herein is a recording medium on or from which the recording or reproduction of data is stably performed. On the recording medium, data are recorded three-dimensionally by the irradiation of a recording laser beam. The recording medium includes a reflection control layer including a plurality of reflection layers stacked in a film thickness direction, each reflection layer having a connection terminal, each reflection layer exhibiting reflectivity and transmissivity changeable in response to an electrical signal supplied to the connection terminal and a recording layer disposed at a beam incidence side of the reflection control layer. | 10-01-2009 |
| 20090252017 | OPTICAL COMPENSATOR FOR USE IN AN OPTICAL SCANNING DEVICE - An optical compensator for use in an optical scanning device for scanning optical record carriers, there being at least two different information layer depths within two different ones of the carriers, the optical record carriers including a first optical record carrier ( | 10-08-2009 |
| 20090279408 | OPTICAL DATA RECORDING/REPRODUCING SYSTEM PICKING UP MULTIPLE TRACKS BETWEEN GUARD BANDS - The present invention relates to an optical system for performing radial tracking on an optical record carrier ( | 11-12-2009 |
| 20090285077 | OPTICAL PICKUP DEVICE AND OPTICAL RECORDING MEDIUM INFORMATION REPRODUCTION DEVICE - The present invention provides an optical pickup device and optical recording medium information reproduction device that are capable of reproducing information that is recorded on a plurality of kinds of optical discs having different track pitches. With the present invention, an optical pickup device generates a main beam and sub beams that are made up from pairs of semi sub beams, such that the distance in the radial direction between center positions of a pair of semi sub spots on an optical disc where a pair of semi sub beams are formed is an odd multiple of half the track pitch of the optical disc, and the distance in the radial direction between center positions of semi sub spots that correspond to another pair of sub semi sub beams is an odd multiple of half the track pitch of another optical disc. | 11-19-2009 |
| 20090290474 | OPTICAL PICKUP APPARATUS AND OBJECTIVE OPTICAL ELEMENT - A light flux from the first light source forms a converged spot on first optical information recording medium by only a refraction action of the aspheric surface, or by a combination of the refraction action and an optical action given by at least one of the first phase structure and the second phase structure, a light flux from the second light source forms a converged spot on second optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure, and a light flux from the third light source forms a converged spot on third optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure. | 11-26-2009 |
| 20090310464 | THREE-DIMENSIONAL OPTICAL INFORMATION CARRIER - An optical data carrier is presented comprising first and second recordable media located in at least one first portion and at least one second portion of the data carrier, respectively. These first and second recordable media differ from each other in a storage capacity and a data recording rate. | 12-17-2009 |
| 20090316560 | OPTICAL PICKUP AND INFORMATION EQUIPMENT - An optical pickup ( | 12-24-2009 |
| 20090316561 | Optical Information Recording Method, Optical Information Reproduction Method and Optical Disk Device - When a phase shift is to be evaluated, based on a difference between an output from a waveform equalization circuit to equalize an input reproduced signal to a predetermined target equalization characteristic and the target equalization characteristic, the phase shift of the reproduced signal relative to a channel clock, a group delay characteristic with respect to the frequency of the waveform equalization circuit is fixed. Hence, an equalized waveform as an output from the waveform equalization circuit can preserve phase shift information of the inputted reproduced signal to correctly detect the phase shift of the reproduced waveform using the equalized waveform. It is hence possible to realize, with high precision, optimal value learning of various parameters for the recording, reproduction, and servo by use of the phase shift as an index. | 12-24-2009 |
| 20100054105 | OPTICAL PHASE CONTROLLER AND OPTICAL PHASE CONTROL METHOD - An optical phase controller includes an optical phase control element so that a phase of incident light applied to the optical phase control element is controlled. The optical phase control element includes a metal structure having anisotropy in a first direction and a second direction perpendicular to the first direction within an electric-field vibration plane of the incident light, the wavelength of the incident light includes a plasmon resonance wavelength possessed by the metal structure, and the incident light is linearly polarized light or elliptically polarized light simultaneously having polarized components in the first direction and the second direction perpendicular to the first direction. | 03-04-2010 |
| 20100097918 | OPTICAL RECORDING HEAD, OPTICAL RECORDING HEAD MANUFACTURING METHOD AND RECORDING/REPRODUCING DEVICE - Provided is a highly reliable optical recording head which has a small fluctuation of a quantity of light applied on a recording medium due to temperature. The optical recording head is provided with a light guide section for guiding light applied from a light source, a slider relatively moving to the recording medium, and a light transmitting section, which is arranged on the slider, transmits the light outputted from the light guide section and outputs the light toward the recording medium. The optical recording head is further provided with an adhesive layer, which is sandwiched between the light transmitting section and the light guide section and fixes the positions of the light transmitting section and the light guide section, and an elastic cohesive layer, which is sandwiched between the portions other than the light transmitting section of the slider and the light guide section. | 04-22-2010 |
| 20100103797 | PICKUP F0R ACCESSING MOVING STORAGE MEDIA AND DRIVE HAVING THE PICKUP - A pickup for accessing moving storage media, carrying substantially parallel information tracks, has a carrier, an actuator and suspension elements joining the carrier and the actuator. The actuator has a body and a lens and is movable in a tracking direction and in a focus direction. The suspension elements extend substantially in an information direction orthogonal to the tracking direction and the focus direction and are arranged at opposite sides of the body in the tracking direction, where they are stacked at each side in focus direction. Each suspension element has two parts, where a first part is connected to the carrier and a second part is connected to the body of the actuator. According to the invention, the suspension elements are constituted as suspension wires, where each suspension wire is folded, where the first part and the second part are constituted as a first side and a second side of the folded suspension wire and where the both sides form an acute angle with each other. | 04-29-2010 |
| 20100142354 | OPTICAL PICKUP DEVICE - In an optical pickup capable of removing inter-layer crosstalk, a dark line that may appear in a central portion of a beam is removed. Thereby, an error in a data signal is reduced. Reflected light from a multi-layer disc is split into two parallel bundles with a splitting optical system in a way that the light is split at a central line. Thereby, when reflected light from a target layer is focused, the reflected light is not influenced from an attenuation element provided on an optical axis. | 06-10-2010 |
| 20100149949 | OPTICAL PICKUP AND OPTICAL DISC DEVICE - An optical pickup according to the present invention includes an integrated circuit element (LDD) | 06-17-2010 |
| 20100208566 | METHOD AND APPARATUS FOR PERFORMING LAYER CHANGES FOR AN OPTICAL DISK DRIVE - The invention provides a method for performing layer changes for an optical disk drive. In one embodiment, the optical disk drive intends to move a focus of a laserbeam emitted by a pickup head from a present layer onto a target layer of an optical disk. First, an amplitude ratio between a first amplitude of a first S-curve of a previous focusing error signal and a second amplitude of a second S-curve of the previous focusing error signal is determined. The object lens is then moved towards a target position for focusing of the laserbeam on the target layer. A focusing error signal is then generated. The focusing error signal is then amplified or attenuated according to the amplitude ratio to obtain an amplified or attenuated focusing error signal. Whether the object lens has reached the target position is then determined according to the amplified or attenuated focusing error signal. | 08-19-2010 |
| 20100220575 | OPTICAL PICKUP HEAD - An optical pickup head includes a first light source, a second light source, a base, a light adjusting unit, and a light guiding unit. The first light source emits a first wavelength light beam to read a first data density optical storage medium. The second light source emits a second wavelength light beam to read a second data density optical storage medium. The base includes at least a slant surface for reflecting the first wavelength light beam and the second wavelength light beam, so that the first wavelength light beam and the second wavelength light beam are parallel with each other. The light adjusting unit adjusts the first wavelength light beam and the second wavelength light beam to the same optical axis. The light guiding unit guides the first wavelength light beam and the second wavelength light beam to the first data density optical storage medium or the second data density optical storage medium. | 09-02-2010 |
| 20100226233 | OPTICAL PICKUP DEVICE - An optical pickup device includes a first optical system and a second optical system. The first optical system and the second optical system each include a mirror member that reflects light from a light source to change a direction of propagation of the light to a direction substantially perpendicular to the information storage surface of an optical disc. The first optical system and the second optical system are arranged such that a direction in which light from a first light source enters a first mirror member is substantially perpendicular to a direction in which light from a second light source enters a second mirror member. | 09-09-2010 |
| 20100271924 | OPTICAL APPARATUS - An optical apparatus according to the present invention comprises an optical base having a bonding surface, and an optical component fixedly bonded to the bonding surface with an adhesive. The optical base has an open hole formed in the bonding surface. The open hole is filled with the adhesive. The optical component contacts the open hole so that a part of the open hole is left unclosed. | 10-28-2010 |
| 20100278029 | REFLECTING WAVELENGTH PLATE AND OPTICAL PICKUP USING REFLECTING WAVELENGTH PLATE - Disclosed is a reflecting wavelength plate that deflects and reflects a light path and adds a phase difference with respect to plural incident light having different wavelengths. The reflecting wavelength plate includes a substrate; a reflecting film laminated on the substrate; and a sub-wavelength concavo-convex structure that is laminated on the reflecting film and has a pitch less than or equal to the shortest wavelength of the plural incident light. The filling factor and the groove depth of the sub-wavelength concavo-convex structure are determined so as to add the phase difference obtained by (kπ)/8, where k is an integer, to the plural incident light having the different wavelengths. | 11-04-2010 |
| 20100309769 | OPTICAL PICKUP - In an optical pickup, a photo receiving portion for receiving returned light reflected by an optical disc is adhered and fixed to an optical base. The photo receiving portion has a photodetector and a plate on which the photodetector is loaded. The plate is fixed onto the optical base by adhesive such that the photo receiving portion is adhered and fixed to the optical base. The plate is in a substantially circular shape in plan view. | 12-09-2010 |
| 20110007621 | Near Field Optical Head and Information Recording and Reproducing Device - A near field optical head includes: a slider provided so as to float from a surface of the magnetic recording medium by a predetermined distance, the slider having a facing surface faced to a surface of the magnetic recording medium; a tipped-shaped near field light generating element formed on the facing surface to have a bottom surface in contact with the facing surface, a top surface formed into a flat surface by cutting a top end of a cone or a pyramid, the flat surface being at a predetermined angle with the bottom surface, and a side surface connecting the bottom surface with the top surface for generating near field light from the top surface; a magnetic pole part formed from a main magnetic pole formed on the side surface and an auxiliary magnetic pole facing the main magnetic pole; a thin film-shaped magnetic circuit connected to the magnetic pole part; and a coil wound around the magnetic circuit. | 01-13-2011 |
| 20110141871 | STORING DATA ON FIBER DATA STORAGE MEDIA - A method and apparatus for storing data is provided. One implementation involves providing a fiber medium for storing data, wherein the fiber medium has a characteristic configured to irreversibly change when exposed to write irradiation. The fiber medium is logically partitioned into cells along the length of the fiber medium. Data is stored in a cell of the fiber medium by exposing the cell to write irradiation to irreversibly change characteristic of the bulk of the cell. | 06-16-2011 |
| 20110141872 | STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD - According to one embodiment, a write-once type information storage medium comprises a recording layer which is formed by mixing a plurality of organic dye based recording materials whose molecular weights are different from each other, and wherein a mixture ratio of organic dye based recording materials whose molecular weight is small is larger than a mixture ratio of organic dye based recording materials whose molecular weight is large. | 06-16-2011 |
| 20110149710 | COMPATIBLE OPTICAL RECORDING MEDIUM - A format of a recordable optical recording medium is described. The recordable optical recording medium is designed in such a way that it has the appearance of a read-only optical recording medium for most players and recorders. Also described are a method for manufacturing the recordable optical recording medium and a method for writing to the optical recording medium. The optical recording medium has a recording area and a guide structure for tracking. The guide structure does only extend over one or a few track spirals or concentric tracks outside the recording area. For writing to this optical recording medium a further light beam falling onto the guide structure or already recorded data is used for generating a tracking error signal for a main light beam. | 06-23-2011 |
| 20110267934 | OPTICAL PICKUP, OPTICAL INFORMATION DEVICE, COMPUTER, OPTICAL DISK PLAYER, CAR NAVIGATION SYSTEM, OPTICAL DISK RECORDER, AND OPTICAL DISK SERVER - To provide an optical pickup and an optical information device, capable of obtaining excellent signal characteristics for an optical disk on and/or from which recording and/or reproducing are performed using a laser. The optical pickup includes an optical detector, a support holder for holding the optical detector, and an optical base for fixing the support holder. The support holder has at least two notches at its both ends, the optical base has convex portions corresponding to the notches of the support holder, the optical base and the support holder are fixed by photo-curable adhesives for bonding the convex portions and the support holder to each other, and the shortest distance between the side faces of the convex portions, which do not face each other, is equal to or less than the width of the support holder in the direction of right and left ends. | 11-03-2011 |
| 20120257487 | OPTICAL DISC DRIVE - An optical disc drive according to the present invention includes: a laser light source | 10-11-2012 |
| 20120314555 | LENS, LENS MOUNTING METHOD AND OPTICAL PICKUP DEVICE - A lens includes a lens portion which condenses light; a reflecting flat portion which is formed in a periphery of the lens portion and reflects parallel light to be irradiated to the reflecting flat portion in a direction opposite to the irradiation direction; and a flange portion which is adhered to a lens holder by an adhesive. An applied portion of the adhesive which is formed on the flange portion is inclined with respect to the reflecting flat portion. | 12-13-2012 |
| 20130121126 | OPTICAL ELEMENT HOLDER, OPTICAL ELEMENT UNIT, AND OPTICAL PICKUP APPARATUS - A holder has walls defining a holding region for holding an optical element, and has a protrusion part overlapping the holding region. The protrusion part is formed at a deformable support part, and can be displaced in a direction away from the holding region by deformation of the support part. When the optical element is fitted into the holding region, the support part deforms and the protrusion part runs on a side surface of the optical element. In this state, the optical element is pressed until a back surface of the optical element abuts a support surface of the holder. The optical element is pressed against the wall and positioned by a return force of the support part. | 05-16-2013 |
| 20130272106 | OPTICAL DISK DEVICE AND OPTICAL DISK DEVICE ADJUSTING METHOD - An optical disk device includes an optical pickup, and a controller. The optical pickup emits light on an optical disk, and detects return light from the optical disk. The controller performs a focus control based on a focus error signal corresponding to the return light detected by the optical pickup, and performs a tracking control based on a tracking error signal corresponding to the return light detected by the optical pickup. The controller finds a relation of an amount of deviation in a tracking balance of the tracking error signal relative to a change in a focus balance of the focus error signal while the tracking control is stopped prior to reproduction of the optical disk. The controller corrects the deviation in the tracking balance attributable to the change in the focus balance based on the relation while the focus balance is adjusted. | 10-17-2013 |
| 20150356991 | OPTICAL DISC AND OPTICAL DISC DEVICE - In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method. | 12-10-2015 |
