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Match Document Document Title
US20060140077 Focalizer alignment  
Described here are methods and devices for aligning an optical servo system used with digital storage media. The devices and methods described herein include alignment apparatuses and alignment...
US20080025168 METHODS FOR DETERMINING RELATIONSHIP BETWEEN MAIN BEAM AND SIDE BEAM IN OPTICAL STORAGE DEVICE AND RELATED APPARATUSES  
Methods and apparatuses for determining a relationship between a main beam and a side beam are provided. One proposed method includes: measuring reflected light of the side beam under a first...
US20070242574 Apparatus for optical pick-up  
An apparatus for optical pickup is disclosed which minimizes offset element occurring between the recorded and non-recorded pattern when object lenses are configured off-axis along the tracks on...
US20050195706 Optical pickup device for optical disks having different track pitches  
Disclosed herein is an optical pickup device for optical disks having different track pitches. The optical pickup device performs tracking servo follow-up using the diffraction patterns of the...
US20050052974 Optical disc apparatus  
In an optical disc apparatus 1, an optical pickup 10a for CD/DVD combo and an optical pickup 10b for BD are fixedly disposed across a spindle motor 12 so as to face each other, and the spindle...
US20060018214 Assembly method of optical pickup and optical pickup apparatus  
A method for assembling an optical pickup apparatus for recording/reproducing a high density DVD, DVD and CD including two objective lens and three laser light sources, the objective lenses being...
US20080279060 OBJECTIVE LENS DEVICE, OPTICAL PICKUP DEVICE, OPTICAL-DISC DRIVING DEVICE AND DRIVING METHOD OF OBJECTIVE LENS  
An objective lens device includes: a first objective lens having a first numerical aperture, which can condense light into a disc-shaped first optical recording medium including a first cover...
US20060126459 Optical pickup device with phase shift mirror  
The present invention relates to an optical pickup device having a phase shift mirror, which universally adopts light sources for recording on and/or reproducing from both CDs and DVDs. In the...
US20080080340 Optical pickup unit capable of preventing a laser diode from destroying from static electricity  
An optical pickup unit includes an optical base and at least one laser diode mounted on an outer wall of the optical base. The laser diode has a base portion, and an LD terminal and a GND terminal...
US20080232208 High Frequency Central Aperture Tracking  
The present invention relates to an optical system for performing radial tracking on an associated optical record carrier. The optical system contains at least one radiation-emitting device...
US20060092783 Disc drive for an optical scanning device  
The invention relates to an optical disc drive that comprises rotating means, defining a rotating axis for an optical disc, and an optical scanning device, for scanning said optical disc with a...
US20070206462 Beam spot position control device and beam spot position control method, and optical disk recording and reproducing device  
A beam spot position control device, for controlling multiple beam spot positions irradiated onto an optical recording medium so as to be disposed linearly, includes a light detecting unit for...
US20060023610 Optical pickup device and optical disk device  
An optical pickup device has first emission unit emits first laser beam, second emission unit emits second laser beam whose wavelength is different from that of first laser beam, to same optical...
US20050249064 Optical element, objective optical system, optical pick-up apparatus, and drive apparatus of optical disk  
An optical pick-up apparatus comprising: a first light source emitting a the first light flux; a second light source emitting a second light flux; a third light source emitting a third light flux;...
US20060193219 Diffraction grating, optical pickup device, and optical disk apparatus  
An optical pickup device is provided which reduces variations in amplitude of a tracking error signal in a seek operation due to an installation error of the optical pickup device onto an optical...
US20060215508 Optical semiconductor device  
An optical semiconductor device both capable of recording and reproducing information with respect to plural optical disks having different track pitches and capable of shortening an assembly time...
US20060114775 Optical pickup apparatus  
The invention relates to an optical pickup apparatus comprising a photodetector (302) which comprises a first segment (A) and a second segment (B), and an optical element (301) intended to receive...
US20060164953 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...
US20050237882 Tracking balance adjustment device  
A tracking balance adjustment device carries out a balance adjustment, when laser beams emitted from a laser element are caused to track a track on the optical disk, to bring the DC component of a...
US20080002540 Holographic diffraction element and optical pickup device using holographic diffraction element  
According to one embodiment, a holographic diffraction element is divided into a plurality of regions which diffract reflected light from an optical recording medium to a plurality of...
US20080019237 FOCUS CONTROL IN A MULTIPLE-BEAM DISC DRIVE  
A method for controlling an optical disc drive apparatus (1) which comprises: light beam generating means (31) for generating a plurality of N optical beams (32(i)); means (33, 34, 37) for...
US20070171786 Optical pickup apparatus and optical disk apparatus  
An optical pickup includes: a light source for an optical disk; a beam splitter for splitting into a main and sub beams; and a photo-detector for sensing the main and sub beams reflected from the...
US20050163000 Optical information recording/reproducing device for performing at servo control by DPP method  
An optical information recording/reproducing device makes use of a differential push-pull (DPP) method. In the optical information recording/reproducing device, after amplification of a push-pull...
US20050174918 Wavefront aberration compensation element, optical pickup, and optical disk apparatus  
A wavefront aberration compensation element includes a wavelength selection phase plate having a plurality of phase steps having various thicknesses at various areas, a liquid crystal layer for...
US20060126457 Three-dimensional information recording and reading method  
The three-dimensional information reading/recording method of this invention enhances the recording capacity as well as performs high-speed reading/recording of information three-dimensionally....
US20130058199 APPARATUS COMPRISING A PICKUP PROVIDING MULTIPLE BEAMS  
The apparatus includes a pickup for reading data from a super-resolution optical disc, the pickup comprising a laser for generating a main beam, a first and a second satellite beam, the two...
US20080074966 Optical Pickup  
An optical pickup wherein a main beam and at least two sub-beams are collected on a disc and a tracking error signal is detected from push pull signals generated from each beam. A phase of the...
US20070041290 Optical head and optical information medium driving device  
A semiconductor laser; a light flux separation element that separates a light flux emitted from the semiconductor laser for a first light flux and a second light flux to come out therefrom; an...
US20060007809 Optical pickup  
There is provided an optical pickup compliant with a three-beam method, a phase difference method, a push-pull method and a three-beam push-pull method, comprising: an emission light source (105)...
US20050265206 Optical disc reproducing device and optical disc reproducing method  
As an aperture diaphragm of an optical disc, the aperture diaphragm in which an aperture differs for a first and a second wavelength, and the aperture in a radial direction of the optical disc at...
US20050105446 Optical pickup apparatus  
This invention provides an optical pickup apparatus which includes a plurality of light sources, a beam shaping element which is arranged in an optical path through which a light beam emitted from...
US20060164954 Optical pickup apparatus  
In an optical pickup apparatus for reproducing and/or recording information from/onto four kinds of optical information recording mediums, an optical path of a light flux entering to a first...
US20060133235 Optical disc apparatus  
An optical disc apparatus includes: a pickup head including light sources for irradiating laser beams onto each of the two types of optical discs set in the unit main body and photodetectors for...
US20050122862 Tracking servo control apparatus and method using rotatable grating  
A tracking servo control apparatus and method in which the distance between a main beam and a side beam is adjustable by a rotatable grating, so as to perform a tracking servo control operation in...
US20060140070 Optical information reproduction device  
An information recording medium (21) of the optical information reproduction device of the present invention includes a recording unit (3) capable of recording information three-dimensionally and...
US20070291600 OPTICAL DISK APPARATUS AND TRACKING METHOD  
A tracking offset is reduced. The effect of an SPP signal fluctuation is reduced by using a variable mixing ratio DPP method, and a residual tracking offset is minimized.
US20060181978 Objective lens and optical system for optical pick-up  
A optical system of an optical pick-up is provided. The optical system includes an optical element including at least a phase shift surface among the surfaces thereof, and located closer to a...
US20050094509 Optical head and optical information recording/reproducing apparatus using same  
An optical head is provided that irradiates an information track in an optical disk with a focusing light to record and/or reproduce information and comprises a first light-receiving surface in...
US20070183279 APPARATUS FOR OPTICALLY RECORDING AND REPRODUCING INFORMATION  
An apparatus for optically reproducing and recording information includes a light source, an objective lens, a light detecting element, and a processor. The objective lens focuses light beams...
US20070237042 OPTICAL INFORMATION REPRODUCING APPARATUS AND OPTICAL INFORMATION REPRODUCING METHOD USING THE SAME  
An optical information reproducing apparatus and an optical information reproducing method using the same are provided. The optical information reproducing apparatus includes: a reference beam...
US20060077802 Optical disk device  
In an optical disk device, an output terminal is connected to an optical pickup, and a preceding sub-beam returning light signal which is electrical signal obtained by converting returning light...
US20070177483 Optical pickup apparatus  
An optical pickup apparatus, comprising: a light source to emit a light flux; a light converging system including an objective lens to converge the light flux emitted from said light source onto...
US20060028935 Optical pickup device, optical disk apparatus, and light-receiving unit  
An optical pickup device, comprises a first light source emitting light with a short wavelength; a second light source emitting s light with a wavelength longer than that of the first light...
US20060176786 Optical disc device  
Light (111) emitted from a light source (110) is transmitted through an objective lens (140), reflected from an optical disc (10), transmitted again through the objective lens (140), and...
US20080095014 OPTICAL PICKUP AND OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE  
An optical pickup equipped with a laser light source which emits light beams of at least three wavelengths for recording/reproducing a plurality of information recording media detects light...
US20050078575 Optical head, LD module, optical recording-and-reproducing apparatus and diffraction element used in the optical recording-and-reproducing apparatus  
A beam emitted from a light source 1 is separated into a main beam and a sub beam by a diffraction element 2. Because the diffraction element 2 has a diffraction pattern shaped like sinusoidal...
US20060280065 Optical pickup device  
A first laser source is arranged on a transmitting side of a polarizing beam splitter, while a second laser source is arranged on a reflecting side of the polarizing beam splitter. The splitting...
US20070147200 SERVO CONTROLLING METHOD OF OPTICAL INFORMATION PROCESSING APPARATUS AND OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS  
A servo controlling method of an information processing apparatus using hologram comprises a step of irradiating a holographic recording medium with a light of first wavelength and irradiating the...
US20060181977 Optical pickup which is compatible with multiple types of media  
A compatible optical pickup can be used with advanced optical discs (AODs), blu-ray discs (BDs), digital versatile discs (DVDs), and compact discs (CDs). The compatible optical pickup comprises a...
US20060077807 Apparatus having an optical head for reading and/or writing data stored in an optical carrier and method involved in this apparatus  
This apparatus comprises an optical head (10) for reading and/or writing data stored in an optical carrier (1) having a circular shape, comprising tracks (100) wound round a center. This apparatus...

Matches 1 - 50 out of 70 1 2 >