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| Number | Title | Issue Date |
| 7751299 | Optical pickup device There is provided an inexpensive optical pickup device that is capable of accurately detecting light quantities of output laser beams on occasion of at least either of reproduction and recording on an information recording medium. A beam from a first light source | 07/06/2010 |
| 7715302 | Optical element and optical pickup apparatus An optical element for use in an optical pickup apparatus includes a substrate made of resin; an antireflection layer coating the substrate and having a low refractive index layer and a high refractive index layer, wherein the resi... | 05/11/2010 |
| 7436751 | Optical pickup head and information recording and/or reproducing device incorporating same An optical pickup head (100) for a high density recording and/or reproducing device compatible with three types of optical recording media. The pickup head includes a first light source (11a) emitting first beams with a first wavelength, a secon... | 10/14/2008 |
| 7414947 | Optical pickup device, recording and reproducing apparatus and gap detection method An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL) the objective l... | 08/19/2008 |
| 7372794 | Compatible optical pickup applying tilt to objective lens in proportion to radial movement of objective lens A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a cor... | 05/13/2008 |
| 7368703 | Optoelectronic input device, method for production of such a device, and method for measuring the movement of an object with the help of such a device The invention relates to an optoelectronic input device (10) in which the input is formed by detected movements of an object (M), the device comprising an optical module (11) comprising at least one laser (1,1′) with a cavity for the generatio... | 05/06/2008 |
| 7369482 | Optical pick-up aberration correcting mirror, aberration correcting method and optical pick-up It is an object of the invention to provide an aberration correcting mirror which has a small size, power saving, a low voltage, a low price and high precision. In particular, it is an object to provide a practical mirror for correcting a spherical aberration. | 05/06/2008 |
| 7361250 | Prism, method of producing a prism, and optical head apparatus using a prism A method of producing a prism comprising a first prism component and a second prism component that are joined together along a partial reflection plane that is inclined with respect to the optical axis. The method has steps comprising measuring the refractive index ... | 04/22/2008 |
| 7342868 | Compatible optical pickup apparatus 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 ... | 03/11/2008 |
| 7327664 | Optical recording apparatus An optical fiber array is constructed by using a plurality of laser modules, which guide a laser beam emitted from a semiconductor laser of a blue color wavelength to an optical fiber, such that beam emitting ends of respective optical fibers are aligned in one row ... | 02/05/2008 |
| 7321542 | Beam shaping prism and optical pickup employing the same A beam shaping prism used in an optical pickup, the beam shaping prism includes a first prism having an incident surface and a second prism having an inclined surface. Since a beam entering the beam shaping prism makes right angles with a beam emerging therefrom, it... | 01/22/2008 |
| 7321533 | Optical pickup device having a wavelength selecting film and an optical reflector An optical pickup device has first and second light sources that emit first and second laser beams of different wavelengths, an object lens that concentrates the first and second laser beams on a data recording surface of an optical disk, an optical separator dispos... | 01/22/2008 |
| 7301864 | 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 o... | 11/27/2007 |
| 7280449 | Optical head and recording and/or reproducing apparatus An optical head in which pre-formatted signals may be detected as variations in the amplitude or the phase in the pre-formatted signals are suppressed, and a recording and/or reproducing apparatus employing the optical head, are disclosed. The optical head includes ... | 10/09/2007 |
| 7272100 | Optical head apparatus The present invention is for providing optical head apparatus that can control scatter occurring at locations along the length of the optical path, when laser beam is transmitted through prism constituting the No. 1 prism structural member and the No. 2 prism struct... | 09/18/2007 |
| 7272083 | Optical head device and method for correcting spherical aberration On an optical disk in a recording and/or playback apparatus, the position at which the thickness error of a light transmission layer is in the optical axis of an objective lens 11, and the position at which the recording/playback of information is performed i... | 09/18/2007 |
| 7230902 | Optical pickup device, recording and reproducing apparatus and gap detection method An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL), the objective ... | 06/12/2007 |
| 7184386 | Integrated type optical head with sheet waveguide and light coupler An integrated optical head is provided. In the integrated optical head, a light source emits light. A waveguide guides the light. An input coupler is located at one edge of the waveguide, and couples light emitted from the light source and transmits the coupled ligh... | 02/27/2007 |
| 7180668 | Optical pickup device and optical disc device This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-f... | 02/20/2007 |
| 7177260 | Optical pickup including a many-sided reflection prism and method of using the optical pickup An optical pickup including a many-sided reflection prism formed as a single body with a plurality of reflection faces to guide a light beam incident through a transmission face in a horizontal direction perpendicular to a height direction by reducing a size of the ... | 02/13/2007 |
| 7170846 | Light receiving and emitting unit and optical pickup using the same A light receiving and emitting unit has a plurality of light sources, a light receiving element, a light control unit, and an optical block. The optical block has at least a first and a second member formed of a material having birefringent property, and a third mem... | 01/30/2007 |
| 7161891 | Optical scanning device An optical head for use in the scanning of a record carrier, the record carrier having data stored on data tracks therein on a plurality of information layers (3, 4) at a plurality of depths within the record carrier. The optical head comprises: a movable opt... | 01/09/2007 |
| 7158468 | Optical system for optical head An optical system for an optical head of an optical disc drive is capable of using first and second discs, protective layer of the second disc being thicker than that of the first disc, a data density of the second disc being lower than that of the first disc. A lig... | 01/02/2007 |
| 7151737 | Optical head and optical disc apparatus for focusing a collimated laser beam An optical head includes a laser source (11) irradiating the laser beam having a wavelength not longer than 500 nm, a collimator lens (13) for collimating the laser beam to the parallel rays, an optical beam shaping system (14, 15) that adjusts ... | 12/19/2006 |
| 7149174 | Optical pickup An optical pickup which appropriately detects reflected light and return light reflected back from an information recording medium even if a laser light B1 emitted from a light source varies in wavelength. The transmittances of a half mirror to the laser ligh... | 12/12/2006 |
| 7145844 | Optical head with adjustable beam shaping element An optical head by which a good detection signal can be obtained based on a zeroth-order diffracted beam and first-order diffracted beams is provided. The optical head includes: a shaping element for shaping a beam emitted from a light source; a converging element f... | 12/05/2006 |
| 7099254 | Optical scanning device An optical scanning device for scanning an optical record carrier includes a radiation source and a beam splitter arranged to pass a first portion of the source beam to the record carrier, and a second portion to an intensity sensor. A signal detector is arranged in... | 08/29/2006 |
| 7088664 | Reflection type compound prism and optical pickup apparatus employing the same A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated... | 08/08/2006 |
| 7079474 | Optical pickup apparatus It is an object of the present invention to provide an optical pickup apparatus which is capable of supporting multiple wavelengths in a reduced size without using a combined prism. An apparatus includes light emitting means having a plurality of integrated l... | 07/18/2006 |
| 7065009 | Optical information storage apparatus and optical device including a beam splitting surface with a convex surface side and a concave surface side There is disclosed a small lightweight optical information storage apparatus which can obtain a sufficient writing light quantity, and an optical device which can realize the optical information storage apparatus. The optical device for use in the optical informatio... | 06/20/2006 |
| 7050381 | Optical system having a convex surface for accessing a storage medium An optical system for accessing a storage medium. The system combines two kinds of laser diode, abandons some unnecessary optical elements used in the prior art, and further uses a Penta prism to fold the optical path. Moreover, the optical system uses a CZBO prism ... | 05/23/2006 |
| 7038994 | 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 ... | 05/02/2006 |
| 7034284 | Optical sensor having light projecting prism An optical sensor projects light rays emanating from a light emitting element that are collimated by a lens and reflected by a mirror and then directed to a light projecting prism. The collimated light rays incident upon the prism are refracted at an incident surfac... | 04/25/2006 |
| 7024091 | Thermal gradient prism for active beam steering A variable optical attenuator (VOA) for use in an optical fiber communication system has a substrate, a thermal gradient prism and a heating element deposited on the prism. Heat is applied to the thermal gradient prism through the heating element. An optical signal ... | 04/04/2006 |
| 7002893 | Optical head with passive temperature compensation An optical pickup apparatus includes a light source and a light detector provided on a stem for detecting source emitted light reflected by an optical recording medium; and a light separating device, having first and second areas, for separating light incident there... | 02/21/2006 |
| 6992969 | Optical pickup device with three adhesive parts on two parallel side faces of an optical component In an optical pickup device, reliability of a holding structure for an optical component (a half mirror) with respect to a pair of mounting frames is intended to be enhanced. A half mirror (5) is arranged so as to bridge a first frame (11) and a second... | 01/31/2006 |
| 6987614 | Optical pickup and optical disc drive device This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-f... | 01/17/2006 |
| 6961297 | Optical head device The present invention provides for a optical head device having a beam-guiding optical device to bring beams of different wavelengths which are emitted by separate light sources together onto the same optical axis or to guide the beams onto a common photo receiving ... | 11/01/2005 |
| 6961298 | Optical head device having a plurality of optical elements with various transmission efficiencies In an optical head device for recording/reproducing information on/from an optical recording medium, at least one laser light source emits a laser light beam provided with a first polarized light component and a second polarized light component which are perpendicul... | 11/01/2005 |
| 6925045 | Optical pickup having two wavelength laser and simple structure In an optical pickup used in a DVD player, a photo detector has a predetermined photo sensing area pattern for detecting a returning laser beam from an optical disc. The returning laser beam is originated from a first laser beam or a second laser beam. The first and... | 08/02/2005 |
