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| Number | Title | Issue Date |
| 8432783 | Optical pickup device and position adjusting method for light separating element An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the la... | 04/30/2013 |
| 8427924 | Optical pickup apparatus An optical-pickup apparatus includes: a three-wavelength-laser diode including first-, second-, and third-laser elements to emit first-, second-, and third laser beams having first, second, and third wavelengths, respectively, the three laser elements housed in the ... | 04/23/2013 |
| 8427925 | HAMR NFT materials with improved thermal stability A near field transducer includes gold and at least one dopant. The dopant can include at least one of: Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo. The dopant concentration may be in a range from 0.5% and 30%. The dopant can be a nanoparticle... | 04/23/2013 |
| 8427926 | Optical pickup lens An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source... | 04/23/2013 |
| 8427923 | Optical pickup device, optical disc device and focus adjusting method An optical pickup device includes an astigmatism element which imparts astigmatism to laser light reflected on a disc, a spectral element which changes propagating directions of four light fluxes obtained by dividing a light flux of the laser light reflected on the ... | 04/23/2013 |
| 8422352 | Optical pickup device An optical pickup device, which can effectively prevent occurrence of trouble in recording and reproducing of information due to the fact that an objective lens for each optical beam is contaminated while not adding unnecessary parts and while reducing a cost, is pr... | 04/16/2013 |
| 8416670 | Method of accessing optical recording media, optical pickup device, and optical drive using the device An optical pickup device corresponding to an optical recording medium having a plurality of recording layers, and an optical drive using the device are provided. The optical pickup device includes a collimator lens disposed between an object lens and a light source.... | 04/09/2013 |
| 8406111 | Objective lens and optical pickup device Provided are an objective lens with enhanced transmittance and an optical pickup apparatus which can record and/or reproduce information properly for three kinds of discs with different recording densities, even if a single lens is used as the objective lens. When a... | 03/26/2013 |
| 8400901 | Optical pickup device An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for generating a second focal line. A light separating element guides the la... | 03/19/2013 |
| 8395981 | Optical pickup device in which optical part is fixedly joined to pickup case by laser irradiation In laser welding an optical part to a pickup case of an optical pickup device, outgas deposition on a lens surface can be inhibited, and positional shifting of the optical part can be reduced. The optical part has a lens surface facing in an optical axis direction a... | 03/12/2013 |
| 8391120 | Optical head, optical disc device and information processing device An optical head, an optical disc device and an information processing device are 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... | 03/05/2013 |
| 8379502 | Recording head, method of manufacturing recording head, and information recording and playback apparatus A near-field light generating element has a core that guides a laser light in a direction of a disk while reflecting the laser light, and a cladding that encapsulates the core in an inner portion, and lengths of a longitudinal direction and a transverse direction of... | 02/19/2013 |
| 8363533 | Optical pickup apparatus An optical pickup apparatus includes an objective lens having a numeric aperture and an incident face. An antireflection coating is formed on the incident face. A collimating lens converts laser light from a laser diode into parallel light, and causes the parallel l... | 01/29/2013 |
| 8345529 | Optical pickup apparatus with astigmatism correcting collimating lens An optical-pickup apparatus includes: a laser diode having a first-laser element, which emits a first-laser beam, and a second-laser element, which emits a second-laser beam having a wavelength shorter than a wavelength of the first-laser beam, arranged in the same ... | 01/01/2013 |
| 8339925 | Optical information recording/reproducing optical system and optical information recording/reproducing apparatus An optical information recording/reproducing optical system, comprising a light source; an optical element converting a laser beam into a substantially collimated beam; and an objective lens, wherein a wavelength λ (unit: nm) of the laser beam falls within a range ... | 12/25/2012 |
| 8315141 | Objective lens driving apparatus An objective-lens-driving apparatus comprising: a base opposed to a signal surface of an optical disc; an objective-lens holder including an objective lens, first and second focusing coils arranged across the objective lens in a tracking direction of the disc, first... | 11/20/2012 |
| 8305866 | Pickup apparatus, optical recording and reproduction apparatus, and recording and reproduction method A pickup apparatus includes a light source; a light separator; an object lens that concentrates the light which penetrated the light separator on the optical recording medium; a movable lens; and a light sensing element that receives the reflected light from the opt... | 11/06/2012 |
| 8305867 | Lens and optical pick-up A lens including: a lens body having first and second surfaces; a flange part formed to protrude from a periphery of the lens body and to have a cylindrical outer circumferential surface; a lens installation surface formed at an outer edge part of the flange part; a... | 11/06/2012 |
| 8305865 | Optical information recording/reproducing optical system and optical information recording/reproducing apparatus An objective lens for an optical information recording/reproducing optical system for an optical disc letting a laser beam impinge on a recording layer of the optical disc, and wherein a center wavelength λ (unit: nm) of the laser beam is in a range defined by a co... | 11/06/2012 |
| 8300514 | Optical pickup device In the invention, a movable lens varying the rate of convergence or divergence of light reaching an objective lens by moving in an optical axis direction has its position adjusted to correspond to ambient temperature. The objective lens is arranged to be tilted with... | 10/30/2012 |
| 8270281 | Optical pickup device and optical disc apparatus using same According to the present invention, of all beams of light reflected from the optical disc, only light in a peripheral region excluding a push-pull region is used to generate a DPD signal. In this method of signal generation that optimizes internal light-receiving su... | 09/18/2012 |
| 8264939 | Optical pickup apparatus An optical pickup apparatus includes: a laser diode configured to emit a laser beam; and an objective lens configured to condense the laser beam into a laser spot through which a signal recorded on a signal recording layer of an optical disc is read out by the laser... | 09/11/2012 |
| 8238222 | Optical disk device Proposed is an optical disk device capable of appropriately performing focus control. In an optical disk device, an objective lens is moved in the thickness direction of an optical disk by controlling an actuator and a time interval in which each of the recording la... | 08/07/2012 |
| 8238221 | Optical pickup device and recording/reproduction device An optical pickup device includes: a first light source for emitting recording laser light; a second light source for emitting reproducing laser light having a wavelength different from a wavelength of the recording laser light; an objective lens for converging the ... | 08/07/2012 |
| 8238220 | Pickup device A pickup device comprising an irradiation optical system including an objective lens to focus a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, and a detection optical system including a photo detector to receive ret... | 08/07/2012 |
| 8233371 | Objective lens, optical head and optical disc device Provides an objective lens, an optical head and an optical disc apparatus (drive) capable of compensating for various types of aberrations including wavelength changes for a plurality of types of optical discs including high density optical discs, DVDs and CDs with ... | 07/31/2012 |
| 8228777 | Objective lens, an optical pickup, and optical information recording/reproducing apparatus An objective lens has a numerical aperture of 0.8 or more and focusing a light beam of a wavelength λ of at least 450 nm or less on an optical information recording medium. In this objective lens, a wavefront-aberration deterioration level TOR, accumulative value o... | 07/24/2012 |
| 8228776 | Apparatus with a pickup for reading data from or writing data to an optical storage medium The apparatus comprising a pickup for reading data from or writing data to an optical storage medium, wherein the pickup comprises a laser providing a laser beam, an objective lens for focusing the laser beam onto the optical storage medium, a first detector and a b... | 07/24/2012 |
| 8223614 | Method of manufacturing synthetic resin lens, method of manufacturing reformed synthetic resin material and optical pickup apparatus A method of manufacturing a synthetic resin lens, comprising: adjusting a degree of change in transmittance of a lens member made of synthetic resin for a blue violet laser beam with accumulated application of the blue violet laser beam, by applying to the lens memb... | 07/17/2012 |
| 8223615 | Compatible near field optical recording/reproducing apparatus A compatible near field optical recording/reproducing apparatus includes a solid immersion lens unit including a first lens, which has an aspherical surface in which light incident from the first light source is condensed, and a second lens, which realizes a high nu... | 07/17/2012 |
| 8208359 | 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 op... | 06/26/2012 |
| 8208360 | Optical pickup device and optical disk driver using the same A light source, an objective lens, and an astigmatism generation element producing for light for focus control, and an optical receiver are provided. The astigmatism generation element is interposed between the objective lens and the optical receiver and produces fo... | 06/26/2012 |
| 8208361 | Objective lens and optical pickup apparatus Provided is an optical pickup device which can properly record and/or reproduce information on and/or from three types of discs having different recording densities and is simple in configuration and low cost. An objective lens is also provided. On the optical surfa... | 06/26/2012 |
| 8199629 | Objective lens for optical pickup device, and optical pickup device There are provided an objective lens for an optical pickup device which can record and/or reproduce information on/from an optical disk with high density with the use of a light flux with a short wavelength while keeping a temperature characteristic to be satisfacto... | 06/12/2012 |
| 8194522 | Aspheric lens and optical pickup including the same An aspheric lens includes at least one aspheric lens surface, and an angle of inclination on the aspheric lens surface is smaller than or equal to 65°. The aspheric lens surface is given by the equation Z ... | 06/05/2012 |
| 8184519 | Optical pickup apparatus An optical pickup apparatus comprising: a diffraction grating that a laser beam enters, the diffraction grating being configured to generate a main beam that is 0th order light and sub-beams that are +1st order diffracted light and −1st order diffracted light; an ... | 05/22/2012 |
| 8174952 | Light source unit, optical detector unit, optical pickup device, and optical disk device A light source unit comprises a plurality of light sources emitting a plurality of light beams. A plurality of volume hologram elements are provided for the plurality of light sources respectively, each volume hologram element having a plane of incidence of an incom... | 05/08/2012 |
| 8159924 | Optical disc device and media type determination method A device includes: an objective lens that serves as a lens having a first numerical aperture when a first optical beam corresponding to a first optical disc converges on the first optical disc while serving as a lens having a second numerical aperture when a second ... | 04/17/2012 |
| 8154979 | Objective lens and optical pickup apparatus Disclosed is an objective lens used for an optical pickup apparatus to perform writing and/or reading of an optical information recording medium, comprising an antireflective film on a surface of a light source side, wherein a light flux of wavelengths including a w... | 04/10/2012 |
| 8154978 | Optical pickup apparatus An optical pickup apparatus comprising: an objective lens configured to focus laser light having the Gaussian distribution properties emitted from a laser diode to a signal recording layer of an optical disc; and an adjustment coating formed on a surface of an incid... | 04/10/2012 |
