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| Application No. | Application Title | Issue Date |
| 20050183643 | Method and apparatus optical head and optical information reproducing An optical head for reproducing information contained on an optical information disk includes a plurality of light sources and a plurality of light receiving elements in correspondence with the plurality of laser light sources. There is constructed a constitution in whi... | 08/25/2005 |
| 20050185566 | Laser beam generating unit A laser beam generating unit has a semiconductor laser unit having a plurality of beam emitting portions located in the shape of a matrix, and a plurality of optical fibers for individually transmitting laser beam emitted from the beam emitting portions. An optical fibe... | 08/25/2005 |
| 20050185539 | Optical reproducing apparatus An optical reproducing apparatus that uses a hologram laser module and is applicable to a DVD Multi drive, wherein five sub spots of light in total that are most suitable to perform the differential push-pull tracking both for DVD-RAM and for DVD-R/RW are irradiated on ... | 08/25/2005 |
| 20050180279 | Optical disk recording/reproducing apparatus In a processing section 4, allowable gain-value range defining unit 41 measures a gain value k corresponding to a level ratio between an MPP signal and an SPP signal generated by a tracking error signal generating circuit 3 to define an allowable ra... | 08/18/2005 |
| 20050180293 | Optical pickup An optical pickup converts a laser beam from a semiconductor laser (1) into a parallel ray with a collimator lens (2), and divides it into a main beam (30), a sub-beam (+1st order component) (31), and a sub-beam (−1st order component) (3... | 08/18/2005 |
| 20050174918 | Wavefront aberration compensation element, optical pickup, and optical disk apparatus A wavefront aberration compensation element includes a wavelength selection phase plate having a plurality of phase steps having various thicknesses at various areas, a liquid crystal layer for obtaining a prescribed wavefront aberration, and a pair of first and second ... | 08/11/2005 |
| 20050163000 | Optical information recording/reproducing device for performing at servo control by DPP method An optical information recording/reproducing device makes use of a differential push-pull (DPP) method. In the optical information recording/reproducing device, after amplification of a push-pull signal of first and second subbeams at a first predetermined ratio, a diff... | 07/28/2005 |
| 20050163018 | Optical head, optical recording and/or reproducing apparatus and integrated optical module An optical head includes a light emitter/detector to emit a laser light towards an optical disc and to detect a return light from the optical disc, a diffraction grating to split the laser light into three beams, and a light converging optical system to focus the laser ... | 07/28/2005 |
| 20050163017 | Optical pickup device with a plurality of laser couplers An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC 07/28/2005 | |
| 20050162995 | Optical pickup device, optical disk drive, optical device and composite optical element An optical pickup device is provided which includes a double-wavelength objective lens (34) that collects a light beam selectively emitted from a light-emitting/-detecting element (31) that selectively emits a plurality of light beams different in waveleng... | 07/28/2005 |
| 20050141391 | Optical pickup An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and li... | 06/30/2005 |
| 20050128923 | Optical pickup device An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, a... | 06/16/2005 |
| 20050122862 | Tracking servo control apparatus and method using rotatable grating A tracking servo control apparatus and method in which the distance between a main beam and a side beam is adjustable by a rotatable grating, so as to perform a tracking servo control operation in accordance with a differential push-pull (DPP) method for both the DVD-RO... | 06/09/2005 |
| 20050122861 | Optical pickup apparatus for optical data media of different formats and method thereof An optical pickup apparatus for reading and writing information from and to optical data media in different formats and a method thereof are provided. The optical pickup apparatus comprises a twin laser diode (Twin LD), a diffraction element for dividing a laser beam in... | 06/09/2005 |
| 20050105444 | Apparatus for recording information and apparatus for recording and reproducing information An apparatus for recording information, which comprises a one-dimensional diode array (21) constituted with a plurality of laser diodes arranged in a line, a modulation control signal generator (23) for supplying the laser diodes constituting the one-dimen... | 05/19/2005 |
| 20050105446 | Optical pickup apparatus This invention provides an optical pickup apparatus which includes a plurality of light sources, a beam shaping element which is arranged in an optical path through which a light beam emitted from at least one of the light sources passes, and an optical system which inc... | 05/19/2005 |
| 20050105414 | Optical disk apparatus An optical disk apparatus includes a digital signal processor, a photo-detector circuit, and a sample-and-hold circuit. By using a sampling-timing signal generated by the sampling-timing signal based on a sampling-timing signal transmitted from the digital signal proces... | 05/19/2005 |
| 20050094509 | Optical head and optical information recording/reproducing apparatus using same An optical head is provided that irradiates an information track in an optical disk with a focusing light to record and/or reproduce information and comprises a first light-receiving surface in which a light reflected from an optical disk is received in an interfering a... | 05/05/2005 |
| 20050094511 | Method and device for detecting optical data and reading-writing apparatus for optical data Light from a light source is applied to a diffraction grating via a collimator lens. The light diffracted by the diffraction grating is applied to a polarization beam splitter. The light polarized by the polarization beam splitter at a given polarizing plane is transmit... | 05/05/2005 |
| 20050094510 | Optical pickup including polarization holographic optical element and photodetector Disclosed is an optical pickup including a polarization holographic optical element (HOE) and a photodetector. The optical pickup includes a light source, an optical path changer, an objective lens, a polarization HOE, and a photodetector. The polarization HOE has a pat... | 05/05/2005 |
| 20050083825 | Manufacturing method for optical head device and optical head device A manufacturing method for an optical head device includes integrating at least a plurality of light sources and a plurality of diffraction elements with each other as an optical module, adjusting a relative positional relationship of the plurality of diffraction elemen... | 04/21/2005 |
| 20050078575 | Optical head, LD module, optical recording-and-reproducing apparatus and diffraction element used in the optical recording-and-reproducing apparatus A beam emitted from a light source 1 is separated into a main beam and a sub beam by a diffraction element 2. Because the diffraction element 2 has a diffraction pattern shaped like sinusoidal wave, the spot of the sub beam becomes larger than that ... | 04/14/2005 |
| 20050073921 | Optical pickup apparatus and method for controlling phases of three beams An optical pickup apparatus and method are provided. The apparatus and method include a light source unit having a holder in which an optical module having first and second light sources for emitting light having different wavelengths and a gating are installed, an opti... | 04/07/2005 |
| 20050063280 | Optical pickup and optical recording/reproducing apparatus using the same An optical pickup apparatus and an optical recording/reproducing apparatus employing the optical pickup apparatus, which can be adaptive for multiple types of optical discs different in the layout conditions such as recording density, etc., are provided. The optical pic... | 03/24/2005 |
| 20050063263 | Compatible optical pickup apparatus and method of using A compatible optical pickup apparatus and method are provided. The apparatus and method include a first light source for generating and emitting a first light having a predetermined wavelength, a second light source for generating and emitting a second light having a wa... | 03/24/2005 |
| 20050052966 | Optical-disc driving apparatus, optical-disc driving method, storage medium, and program An optical-disc driving apparatus for an optical disc includes a pickup; a detection unit for detecting a traverse signal by differential push-pull (DPP) detection for every radial tilt angle within a first range, the radial tilt angle being measured between the optical... | 03/10/2005 |
| 20050052974 | Optical disc apparatus In an optical disc apparatus 1, an optical pickup 10a for CD/DVD combo and an optical pickup 10b for BD are fixedly disposed across a spindle motor 12 so as to face each other, and the spindle motor 12 is shifted between the first and ... | 03/10/2005 |
| 20050052968 | Optical pickup using a wedge type beam splitter A compatible type optical pickup using a wedge type beam splitter that can record and/or reproduce information on/from optical recording media having different formats. The compatible type optical pickup includes: a first light source that generates and emits a first li... | 03/10/2005 |
| 20050047292 | Optical pickup and optical recording and/or reproducing apparatus adopting the same An optical pickup which, when a first light reflected by a recording medium is divided into a central light area and first and second peripheral light areas at both sides of the central light area, divides the first light reflected by the recording medium into at least ... | 03/03/2005 |
| 20050025026 | Objective lens, optical, pickup and optical information processing apparatus using the same An optical pickup includes a first optical source producing a first optical beam having a wavelength λ1, a second optical source producing a second optical beam having a wavelength λ2 (λ1<λ2), and a single objective lens focusing any of the first and second optical ... | 02/03/2005 |
| 20050025002 | Optical head and recording and/or reproducing apparatus employing same Disclosed is an optical head in which position adjustment of a photodetector light receiving surface or component parts may be simplified, production costs may be reduced and operational reliability may be improved. The optical head includes a light source 22, ra... | 02/03/2005 |
| 20050018585 | Optical pickup device When an extra-high density optical disc, a DVD having a recording density lower than that of the extra-high density optical disc, a CD having a recording density lower than that of the DVD, and a combined optical recording medium in which the extra-high density optical ... | 01/27/2005 |
| 20050018560 | Compatible optical pickup and optical recording and/or reproducing apparatus employing the same A compatible optical pickup including an optical unit and a focusing unit. The optical unit emits a short wavelength light for high-density recording media and a long wavelength light for low-density recording media, directs the short and long wavelength light to a reco... | 01/27/2005 |
| 20050007905 | Optical pickup An optical pickup used to record information on and/or reproduce information from an optical recording medium, the optical pickup including an optical module to emit a light beam; and a front photo-detector to monitor power of the light beam; wherein the optical module ... | 01/13/2005 |
| 20050007932 | Optical head, optical disk drive, and optical system adjustment method An optical head according to an example of this invention has a polarization beam splitter, objective lens, photodetection element, first optical diffraction element, and second optical diffraction element. The first optical diffraction element is arranged on the optica... | 01/13/2005 |
| 20050007906 | Objective lens, optical pick-up device, and optical disk device To provide an optical pickup device and optical disk device capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where coping with various wavelengths of laser including a blue laser. An optic... | 01/13/2005 |
| 20050002292 | Optical pick-up, optical disk apparatus and information processing apparatus An optical pick-up capable of reproducing information excellently on both CD and DVD, which are significantly different in terms of three kinds of factors, a base material thickness, a wavelength of a light source, and NA, and detecting TE signals by three kinds of meth... | 01/06/2005 |
