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| Number | Title | Issue Date |
| 8169877 | Optical disc apparatus An optical disc apparatus for use of an optical disc including a plurality of recording layers sets an amount of correction of spherical aberration for each of the recording layers of the disc during a focus sweep. A photodetector portion produces a signal in respon... | 05/01/2012 |
| 8165002 | Optical pickup apparatus and objective lens An optical pickup apparatus comprising: a laser diode; an objective lens made of synthetic resin arranged in an optical path of laser light between the laser diode and an optical disc so that the laser light from the laser diode is focused onto a signal recording la... | 04/24/2012 |
| 8094539 | Optical information detection method, optical pickup, and optical information recording and reproducing apparatus An interference-type optical pickup, an optical information detection method, and an optical information recording and reproducing apparatus, which allow easy adjustment of a path difference between two lights, have a high signal amplification effect and are suitabl... | 01/10/2012 |
| 8085644 | Achromatic polarization devices for optical disc pickup heads Chemically-bonded laminated polymer achromatic polarization devices, such as circular polarizers, are disclosed for use in optical disc (e.g., CD/DVD) pickup heads. Chemically-bonded laminated polymer achromatic polarization devices have the benefit of providing sta... | 12/27/2011 |
| 8077581 | 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 ... | 12/13/2011 |
| 8077582 | Optical pickup, optical information recording method, and optical disc apparatus The recording accuracy of information on an optical disc is increased. An information optical system (150) of an optical disc apparatus (110) enables a semiconductor laser (3) to sequentially output specific peak light (LEP) and specific ... | 12/13/2011 |
| 8054731 | Photodetector and optical pickup apparatus A photodetector comprising: a first light-receiving surface configured to receive reflected light of zero-order light generated based on a laser beam, from one information recording layer of a multilayer optical disc; a second light-receiving surface that is adjacen... | 11/08/2011 |
| 8050167 | Optical device An optical device includes a sub-mount 2 mounting first and second semiconductor lasers 1a, 1b and having an onboard part for the semiconductor lasers and an optical-path conversion mirror 7 integrated with each other, and a... | 11/01/2011 |
| 8036089 | Optical pick-up, method of generating aberration for compensation and optical information processing apparatus using the same An optical pick-up to perform recording or reproducing for an optical recording medium is disclosed, which includes a light source configured to emit a light beam, an objective lens configured to focus the light beam onto the optical recording medium, and an aberrat... | 10/11/2011 |
| 8023387 | Optical pickup device An optical pickup device radiates laser light to a disc having a plurality of recording layers in a direction of lamination. The optical pickup device includes an astigmatic element and a spectral element. The astigmatic element allows reflected light from the disc ... | 09/20/2011 |
| 8023386 | Optical pickup apparatus and optical disk drive apparatus An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective lens; and a light receiving device to which light reflected from the opt... | 09/20/2011 |
| 8004952 | 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, ... | 08/23/2011 |
| 8004951 | Pickup device A pickup device includes an irradiation optical system including an object lens for focusing light flux on a track of a recording surface of an optical recording media having a plurality of recording layers stacked while a spacer layer is interposed between the reco... | 08/23/2011 |
| 7986604 | Optical element and optical pickup device An objective lens causes birefringence, which causes wave aberration in outgoing light from the objective lens. A coated objective lens has a dielectric multilayer film that can reduce astigmatism component of the wave aberration to 5 mλ rms or smaller when 10 mλ ... | 07/26/2011 |
| 7957249 | Objective lens, optical pickup apparatus and optical information recording and/or reproducing apparatus An objective lens according to the present invention is an objective lens used for an optical pickup apparatus, and the objective lens includes a superimposed structure on a surface of a lens with a power in which a first optical path difference providing structure ... | 06/07/2011 |
| 7940629 | Information recording apparatus and information reproducing apparatus Information light modulated and emitted by a modulation element is led to a recording medium through a Fourier transform optical system and an optical path shifter. An interference image is recorded on the recording medium by interference of the information light an... | 05/10/2011 |
| 7933188 | Optical pickup To reduce a bad influence on a tracking control signal and a data signal by reflected light from an adjacent layer on a multi-layer disc as stray light, the following device is made in the invention. Reflected light from the multi-layer optical disc including stray ... | 04/26/2011 |
| 7916611 | 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 int... | 03/29/2011 |
| 7911920 | Optical pick-up apparatus and method for multi-optical disk type recording/reproducing An optical pick-up apparatus including an optical source module having a CD optical source and a DVD optical source, a diffracting grating dividing a light beam from the optical source module to at least three divided light beams, a first optical divider changing a ... | 03/22/2011 |
| 7907497 | Multi-format optical storage medium, optical pickup, and optical read/write device There is provided a storage layer (13) between storage layers (11), (15). The storage layer (13) produces a relatively large spherical aberration for a protection layer thickness error. Information is written to or read from the storage l... | 03/15/2011 |
| 7903528 | Optical pick-up apparatus An optical pickup apparatus for conducting recording and/or reproducing information for a first optical information recording medium including at least a transparent protective substrate, a first information recording surface, and a second information recording surf... | 03/08/2011 |
| 7852733 | Apparatus for reproducing signal from multi-layered optical disk using multiple photo detectors An optical pickup apparatus for shining light on and detecting reflected light from an optical disk having two recording layers. The apparatus includes a light source, an optical system situated on a path of a light beam returning from the optical disk, the optical ... | 12/14/2010 |
| 7848205 | 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 ... | 12/07/2010 |
| 7830772 | Objective optical system and optical information recording/reproducing device having the same There is provided an objective optical system for an optical information recording/reproducing device. The objective optical system includes an optical element having an annular zone structure on at least one surface. The annular zone structure includes annular zone... | 11/09/2010 |
| 7826328 | Optical pickup device and optical disk apparatus using the same An optical pickup device includes: a light source that emits a light beam; a divergence-angle converting lens that converts an angle of divergence of the light beam emitted from the light source and emits the light beam; and an object lens displaceable in a tracking... | 11/02/2010 |
| 7808878 | Optical pickup apparatus and drive apparatus having the same An optical pickup apparatus and a drive apparatus having the same are provided. Second light-receiving elements or third light-receiving elements for receiving ±first-order diffraction light beams from a polarization hologram are arranged outwardly of a circular re... | 10/05/2010 |
| 7796487 | Optical system for data storage devices An apparatus includes a moveable arm for positioning an optical transducer adjacent to a storage medium, a light source, and an elliptical or ellipsoid shaped mirror mounted for reflecting light from the light source to the optical transducer. The elliptical mirror ... | 09/14/2010 |
| 7796488 | Optical pickup apparatus An optical pickup apparatus aiming at reduction of adverse effect on a tracking control signal and a data signal by preventing the reflected light from the adjacent layers of a multilayer disc changing to a stray light. In this optical pickup apparatus, the reflecte... | 09/14/2010 |
| 7796489 | Optical head with diffuser structure An optical head for reading an object includes a hollow housing, a light source module, a diffuser structure and a light sensing module. The light source module is fixed in the hollow housing and provides an initial light ray. The diffuser structure is connected the... | 09/14/2010 |
| 7796490 | Optical pickup and optical information processing apparatus An optical pickup performing recording, reproduction and deletion of information on or from an optical recording medium. The pickup includes light sources for information recording media using a blue wavelength beam, information recording media of DVD family and inf... | 09/14/2010 |
| 7787347 | Optical head device and optical information processor A laser beam 32 reflected by an information layer of a multilayer optical disc 26 is reflected and split by reflecting surfaces 31a′, 31b, 31c and 31d to be incident on a photodetector element | 08/31/2010 |
| 7782734 | Optical pickup which is compatible with multiple types of media An optical pickup which is compatible with different types of media is disclosed. A plurality of light sources emit light with different wavelengths. Light path changers change the path of light emitted by the plurality of light sources so that the light is incident... | 08/24/2010 |
| 7778137 | 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, f... | 08/17/2010 |
| 7768895 | Optical pickup device and optical disk drive To reduce the size or thickness of an optical pickup device and an optical disk drive, an optical pickup device includes a light source that radiates laser light; a condensing member that condenses the laser light onto a recording medium; an optical member that refl... | 08/03/2010 |
| 7742381 | Optical scanning device The invention relates to an optical scanning device for scanning in a first mode a first information layer (111) of an information carrier and in a second mode a second information layer (112) of the information carrier. The optical scanning device com... | 06/22/2010 |
| 7738342 | Optical pickup device An optical pickup device enables prevention of an increase of spherical aberration during tracking without needing any finite optical system. The diameters of parallel light beams (A, B, C) for the next-generation DVDs, DVDs, and CDs are limited to diameters of a, b... | 06/15/2010 |
| 7715296 | Optical head device and optical recording and reproducing apparatus An optical head device and an optical recording and reproducing apparatus using this optical head device, which can record information and reproduce the recorded information at any of optical recording media, such as a next generation optical recording medium, in wh... | 05/11/2010 |
| 7710846 | Protection member and optical pickup device using the same The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from... | 05/04/2010 |
| 7706234 | Optical head with switchable diameter of the radiation spot on the radiation detector In an optical scanning device (10) capable of scanning an information plane of an optical record carrier (5) of different types such as BD, DVD and CD, the diameter of the radiation spot on the detector (7) is dependent on the numerical aperture... | 04/27/2010 |
| 7697392 | Optical pickup apparatus and optical information recording and/or reproducing apparatus An optical pickup apparatus which conducts reproducing and/or recording information for a first optical information recording medium by using a light flux having a wavelength λ1 (350≦λ1 (nm)≦480) and a second optical information recording medium.... | 04/13/2010 |
