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Match Document Document Title
7391684 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...
RE40329 Single objective lens for use with CD or DVD optical disks  
An optical disk reader or read/write system for CD or DVD formats. First and second laser diodes operating at different wavelengths have their output beams collimated and directed at a single...
7376055 Method of annealing optical recording medium  
There is provided a method of annealing an optical recording medium formed on a substrate having a land and a groove, comprising the steps of: annealing one side wall between the land and the...
7369467 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...
7369466 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...
7366078 Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method  
An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a...
7359295 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...
RE40229 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7355933 Optical pickup device  
Substantially all of the laser light emitted from laser chip(s) 11 toward optical disk(s) 17 may be transmitted through polarizing hologram(s) 13 and may thereafter be transmitted through...
7349299 Method of optical disc discrimination  
A method for discriminating between different types of optical discs is intended to apply to an optical storage device with a pick-up head having three beams. A main beam push-pull signal and a...
7345965 Method for track counting and corresponding apparatus for reading from and/or writing to an optical recording medium  
In an apparatus for reading from and/or writing to an optical recording medium, it is desirable, in particular in the case of track jumps, to detect the direction of the track jump, i.e. the...
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...
7342851 Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method  
An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a...
7336586 Optical pickup device compatible with two types of optical recording media  
An optical pickup device compatible with two types of optical recording media in accordance with the present invention includes: a first light source emitting a first laser beam with a first...
7330406 Optical pickup device and optical element used for the same  
An optical pickup device, comprises light sources to emit a first light flux having a wavelength λ 1 (380 nm<λ 1 <450 nm); a second light flux having a wavelength λ 2 (600 nm<λ 2...
RE40017 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7317668 Information recording and/or reproducing apparatus  
An information recording and/or reproducing apparatus includes a laser light source from which a laser beam having a wavelength of from 220 nm to 280 nm exits; and a converging lens unit disposed...
7313061 Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals  
An optical pickup comprises: first and second semiconductor lasers ( 11, 14 ); a hologram element ( 17 ) for diffracting light reflected by an optical information recording medium ( 9 or 12 );...
7307930 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...
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...
7298676 Optical pickup apparatus having optical detection area for compensating for tracking error offset  
The optical pickup apparatus includes a light emitting means, an optical means, and an optical detection means. The light emitting means emits a single beam. The optical means diffracts the single...
7298675 Multilayer recording medium and optical pickup for recording and/or reproducing the same  
An optical pickup for recording and/or reproducing data with respect to a multilayer recording medium having a plurality of recording layers, where the optical pickup includes a light source...
RE39883 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7283439 Optical disk apparatus using mechanism for controlling spherical aberration  
In the past there has been a problem that on a detection surface the influence of interference causes a defocusing signal to degrade, narrowing the range in which spherical aberration can be stably...
7280458 Optical pickup apparatus and optimal light spot focusing method  
An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light...
RE39860 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7274632 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...
7272084 Optical disc apparatus and tracking control method  
In a configuration in which side beams scan in positions that are offset with respect to a main beam by approximately (¼+n)P or (¾+n)P in the radial direction of an optical disk, a differential...
7266057 Method for generating a lens position signal and corresponding apparatus for reading from and/or writing to an optical recording medium  
In order to generate a lens position signal, which describes the position of the optical axis of an objective lens of an apparatus for reading from and/or writing to an optical recording medium...
7260033 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...
7248545 Optical pickup device  
According to the present invention, an optical pickup device forms one main spot, a first subspot, and a second subspot by irradiation of light on an optical disk having a groove part and a land...
7248544 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...
7242648 Tracking error signal generation device, optical disc apparatus, tracking error signal generation method and tracking control method  
A tracking error signal generation device includes a splitting and convergence section for splitting an optical beam into a main beam and a sub beam; a two-portion main beam detection section for...
7242647 Optical head unit and optical information writing/reading device  
An optical head unit is provided including a first light source emitting a light with a first wavelength, a second light source emitting a light with a second wavelength, and a third light source...
7230904 Compatible optical disk player and data recording and reproducing method  
A simulation device for simulating an operation of a system constituted by a plurality of machines. An operation program is executed by an arithmetic processing unit in a controller of a machine or...
7230888 Light emitting device and information processing apparatus  
A light emitting device according to the present invention includes: a first light source for emitting light having a first wavelength; and a second light source for emitting light having a second...
7224530 Image capturing device  
A scanning module for scanning a document is provided. The scanning module comprises: a chassis; a light source on the chassis for emitting a light ray onto the document; a plurality of reflectors...
7215609 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...
7215476 Optical pickup, optical information recording/reproducing apparatus using the same, and phase variable wave plate used in the pickup and the apparatus  
Laser beams respectively emitted from a SHG blue laser unit and a red semiconductor laser unit that have photo detectors respectively are turned into parallel lights by a collimator lens and then...
7209416 Method and apparatus for 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...
7206106 Holographic ROM reader having servo control  
A holographic ROM reader having a servo control is disclosed. The holographic ROM reader includes an objective lens for focusing light reflected from a storage medium, a pinhole plate provided with...
7200079 Optical pickup device and optical element used for the same  
An optical pickup device, comprises light sources to emit a first light flux having a wavelength λ 1 (380 nm<λ 1 <450 nm); a second light flux having a wavelength λ 2 (600 nm<λ 2...
7197004 Optical pick-up apparatus  
An object of the invention is to provide a structure for suppressing occurrence of a track offset in a tracking control using DPP method, and simplified apparatus assembly adjustment. When a...
7193954 Optical pickup device and objective lens for the optical pickup device  
An optical pickup apparatus includes first, second and third light sources; a light converging optical system including a first objective optical element and a second objective optical element,...
7190645 Tilt control for optical disk and tilt control method  
At the initialization, a tilt mechanism 9 is activated in a state where an optical pick-up 3 is fixed, and set up at a position where an E-F phase difference obtained in a signal processing...
7184384 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)...
7180837 Optical pickup including an optical modulator, and an optical apparatus comprising the optical pickup  
The present invention relates to an optical pickup, and more particularly to an optical pickup comprising an optical modulator for reflecting and diffracting an incident light beam to generate...
7173888 Recording apparatus for and method of improving overwrite characteristics  
A recording apparatus and method for recording a mark on a recordable recording medium includes an optical pickup having a light source and an objective lens for focusing light emitted from the...
7170681 Optical scanning device  
An optical scanning device ( 1 ) for scanning three information layer ( 2, 2′, 2″ ) with three respective radiation beams ( 4, 4′, 4″ ) having three respective wavelengths (λ 1 , λ 2 , λ...
7158454 Optical device  
The present invention relates to an optical device which includes a first laser diode, a beam splitter, a first objective lens, a photo-detector, a second laser diode, a wedged plate beam splitter,...
Matches 1 - 50 out of 596 1 2 3 4 5 6 7 8 9 10 11 12 >