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| Number | Title | Issue Date |
| 8351317 | Laser irradiation apparatus, irradiation method using the same, and method of crystallizing amorphous silicon film using the same Provided are a laser irradiation apparatus, an irradiation method using the same, and a method of crystallizing an amorphous silicon film using the same. Particularly, a laser irradiation apparatus which can reduce a deviation of an intensity of a laser beam, an irr... | 01/08/2013 |
| 8274877 | Optical pickup with light receiving element and holding member and method of manufacturing the same An optical pickup (10) includes a light emitting element (11), a holding member (14), a light receiving element (18), and a base (13). The holding member (14) is fixed to the base (13) by a combined bonding portion ( | 09/25/2012 |
| 8213289 | Compatible optical recording medium The optical recording medium has a recording layer sensitive for recording at a first wavelength and sensitive for reading at a second wavelength, the recording layer having a groove structure, wherein at the first wavelength the groove structure has a diffraction e... | 07/03/2012 |
| 8125877 | Optical pickup An optical pickup includes a light emitting component, an optical component and a base component. The light emitting component has a laser diode, a package and a holder. The package has a positioning recess formed in an outer peripheral face of the package. The hold... | 02/28/2012 |
| 8102752 | Optical head and optical pickup device with a holder structure providing optical axis adjustment An optical head comprises a laser holder retaining a laser diode, and a holder support retaining the laser holder, and irradiates an information storage medium with laser light from the laser diode to perform recording/reproduction of information. In this optical he... | 01/24/2012 |
| 8072871 | Short-pulse light-source device, laser driving method, optical pickup, and optical disc apparatus The present invention realizes the emission of a high-output short-pulse beam and a reduction in power consumption. A laser control unit (2) of a short-pulse light-source device (1) raises a gate pulse (PG) of a gate signal (SG) supplied to a power sup... | 12/06/2011 |
| 8068403 | Optical head To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc. The head includes: a first optical system for converging light from a light sour... | 11/29/2011 |
| 8000212 | Metrology for extreme ultraviolet light source An extreme ultraviolet light system includes a drive laser system that produces an amplified light beam; a target material delivery system configured to produce a target material at a target location; a beam delivery system configured to receive the amplified light ... | 08/16/2011 |
| 7952981 | Semiconductor laser device protection circuit, optical pickup apparatus, and information recording/reproducing apparatus A semiconductor laser device has a cathode grounded and an anode connected to a collector of a transistor. The transistor has an emitter grounded and a base connected to a first external terminal via a first resistor. A digital transistor has a collector connected t... | 05/31/2011 |
| 7924690 | Process for intentional deterioration of the contents of an optical recording medium The invention relates to the field of optical information recording. In order to prevent abusive or fraudulent use of storage media, the invention provides a process for intentional degradation of information by application of a laser power below the normal power fo... | 04/12/2011 |
| 7839754 | Optical head and optical disk device An optical head includes a first laser diode configured to generate a laser beam with a wave length of λ1, a second laser diode configured to generate a laser beam with a shorter wave length of λ2 than the wave length λ1, a collimator lens ar... | 11/23/2010 |
| 7808880 | Optical disk drive with hybrid solid immersion objective lens A small form factor optical disk drive is provided that incorporates a hybrid solid immersion objective lens (SIOL). The SIOL includes a central aspheric lens portion and a surrounding diffractive optical element portion. ... | 10/05/2010 |
| 7808879 | Optical disk drive with micro-SIL A small form factor optical disk drive is provided that incorporates a SIL/objective lens assembly. A laser for the small form factor optical disk drive has a coherence function having maxima spaced apart by intervals. The optical disk drive is configured such that ... | 10/05/2010 |
| 7804759 | Contactless optical writing apparatus A single mode laser beam output from a single mode semiconductor laser and a multimode laser beam output from a multimode semiconductor laser are combined with each other by a polarization beam splitter, the combined laser beam is used by a deflection scanning mecha... | 09/28/2010 |
| 7792008 | Optical pickup apparatus There is provided an optical pickup apparatus in which the assembling workability such as chucking of an LD holder by an adjusting jig and spreading of adhesive can be improved. In the optical pickup apparatus, multiple fitting portions (boss portions) 1d ... | 09/07/2010 |
| 7697400 | Optical pickup and optical disc device An optical pickup according to the present invention includes an integrated circuit element (LDD) 5 for driving first, second, and third semiconductor lasers 3, 4, and 5. The LDD 50 is shaped so as to have a rectangular principal face sur... | 04/13/2010 |
| 7680016 | Method for designing an optical pickup A method for designing an optical pickup is provided. The optical pick includes a monolithic laser diode that emits a laser light beam for DVD recording and a laser light beam for CD playback, two photodetective portions, and an objective lens, for each of the emitt... | 03/16/2010 |
| 7675835 | Small form-factor optical data storage device A small form factor optical disk drive is provided. An OPU is mounted on a sled such that an optical path length to the optical media falls substantially between coherence function maxima. ... | 03/09/2010 |
| 7664006 | Device for reading from or writing to optical recording media A device for reading from or writing to optical recording media having an optical assembly and a laser diode coupled thereto is described. The laser diode is a twin laser diode which is coupled to the optical assembly by means of a translationally displaceable rotar... | 02/16/2010 |
| 7646697 | Optical head device and disk drive device An optical head device may include a frame type of laser beam emitting element provided with a heat radiating fin on which a laser chip is mounted, a device frame on which the laser beam emitting element, a light receiving element and an optical system are mounted, ... | 01/12/2010 |
| 7558183 | System and method for optical media marking An information handling system optical medium disc is labeled by removing portions of disc's polycarbonate material from the non-storage side of the disc to form an image. Formed images define a label in various forms including letters, Braille, dot-matrix holes or ... | 07/07/2009 |
| 7558184 | Optical pickup device Provided is an optical pickup device capable to suppress an occurrence of an aberration on a recording medium and a decrease of power of laser beams while employing a diffraction grating as an optical axis correction element. The laser element emitting the la... | 07/07/2009 |
| 7542401 | Birefringence characteristic measuring method, optical recording medium and optical information recording/reproducing apparatus Four types of optical systems, a polarization optical system including an objective lens having a high numerical aperture, a polarization optical system including an objective lens having a low numerical aperture, a non-polarization optical system including an objec... | 06/02/2009 |
| 7535815 | Disc drive apparatus An optical disc drive apparatus includes a laser device for generating a light beam for optically reading data from a disc. The laser device is electrically incorporated in a resonant circuit which includes an inductance coupled to the laser device. ... | 05/19/2009 |
| 7496025 | Optical disc drive apparatus with an indirect semiconductor laser containing an asymmetric quantum well structure An indirect semiconductor laser having an indirect semiconductor used as the material of an active layer is used, instead of a conventional direct semiconductor laser so as to obtain a reproducing optical source, in order to reduce optical interference noise of the ... | 02/24/2009 |
| 7480230 | Light source drive, optical information recording apparatus, and optical information recording method A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacita... | 01/20/2009 |
| 7457226 | Heat source having thermoelectric element, optical pickup assembly employing the same, and method of reducing temperature therein A heat source having a device emitting heat, a case protecting and supporting the device, and a thermoelectric element absorbing the heat emitted from the device and dissipating the heat to an outside. ... | 11/25/2008 |
| 7440386 | Optical device and method of manufacturing the same A copper frame plate (2) has a central frame plate (2a) and a pair of side frame plates (2c) bent from both ends of the central frame plate. A flexible substrate (3) has a central substrate (3a) covering the ce... | 10/21/2008 |
| 7414949 | Semiconductor laser device and optical pickup device A semiconductor laser device includes: a semiconductor laser chip which is composed of a semiconductor substrate and a plurality of semiconductor layers stacked on an element formation face of the semiconductor substrate and which outputs an irradiation light for ir... | 08/19/2008 |
| 7408867 | Method of aligning an optical fiber, method of manufacturing a semiconductor laser module, and semiconductor laser module A method of aligning an optical fiber according to the present invention has a first step of aligning an optical fiber by moving the optical fiber and finding a position that maximizes the power of beam outputted from the optical fiber with the use of a power meter,... | 08/05/2008 |
| 7400568 | Optical device, optical pickup and optical disk apparatus An optical device wherein an optical component and a plurality of light emitting elements are mounted on an identical substrate, a level of a surface on which the optical component is mounted is different from that of a surface on which the light emitting elements a... | 07/15/2008 |
| 7400821 | Device and method for reproducing photographic sound recordings For a reproduction of optical sound information in a double variable-area track (DZ) an optoelectronic converter device scans the optical sound track of a film. The converter device generates a digital image signal for buffer storage in the memory of a program-contr... | 07/15/2008 |
| 7388823 | Optical pickup, manufacturing method thereof, and optical disk system An optical pickup for reading information written on an optical disk is equipped with a vertical multi-mode converted laser diode which emits light, means for focusing the emitted light from the laser diode onto the optical disk, and means for receiving reflected li... | 06/17/2008 |
| 7382709 | Objective lens, optical element, optical pick-up apparatus and optical information recording and/or reproducing apparatus equipped therewith A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a ... | 06/03/2008 |
| 7369481 | Optical element, aberration correcting element, light converging element, objective optical system, optical pickup device, and optical information recording reproducing device An optical system for use in an optical pickup apparatus comprises a first optical surface having a superposition type diffractive structure including a plurality of ring-shaped zones which are formed concentrically around an optical axis, wherein each ring-shaped z... | 05/06/2008 |
| 7368368 | Multi-chamber MOCVD growth apparatus for high performance/high throughput In one embodiment the present invention is a method of conducting multiple step multiple chamber chemical vapor deposition while avoiding reactant memory in the relevant reaction chambers. The method includes depositing a layer of semiconductor material on a substra... | 05/06/2008 |
| 7368157 | Information storage medium and apparatus for recording/reproducing information thereon An information storage medium reduces low frequency noise, and an apparatus records and/or reproduces information thereon. The information storage medium includes a substrate; a recording layer formed on the substrate and including at least two materials in which th... | 05/06/2008 |
| 7366080 | Laser control unit, laser control circuit, and laser-power adjustment method A laser control unit, a laser control circuit and a laser-power adjustment method are provided which are capable of controlling laser power precisely, even if an error is produced in the duty of an optical pulse. A light-receiving element 101 converts the opt... | 04/29/2008 |
| 7359297 | Method and device for recording an information signal on an information layer of a recording medium in which a bias power level of the radiation beam varies with the recording speed during erase pulses The invention relates to a method and a device for recording an information signal 10 in a phase change layer of a recording medium. A mark is recorded by a sequence 13 of write pulses and previous marks between the marks to be recorded are erased by a... | 04/15/2008 |
| 7359308 | Fixing structure for optical element and optical head device A fixing structure for an optical element includes a first element face of the optical element, a second element face of the optical element which is orthogonal to the first element face, a first positioning plane of a fixed member which abuts with the first element... | 04/15/2008 |
