Matches 51 - 100 out of 543 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
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...
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...
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...
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,...
7154831 Device and method for controlling tilt servo  
A tilt servo control device of an apparatus for recording information on and reproducing information from an optical recording medium set in the apparatus, the apparatus comprising an optical...
RE39447 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...
7145859 Compatible optical pickup and method of aligning optical axes therein  
An optical pickup includes a light source which emits first and second lights having different wavelengths for a first recording medium and a second recording medium having a relatively large...
7145847 Annealed optical information recording medium and optical information recording/reproducing apparatus for the same  
A high density optical information recording medium comprises a substrate having rows of land and groove and a recording layer formed on the substrate. Each of the rows of land or groove includes...
7136332 Optical pickup device  
An optical pickup device has a semiconductor in which 2 light emitters laser emitting laser beams having different wavelengths for a DVD and CD are mounted on one package and disposes...
7133343 Optical disk apparatus and optical disk processing method  
An optical disk apparatus has a first optical system having an objective lens with a first NA, a second optical system having an objective lens with a second NA lower than the first NA, an addition...
7123569 Optical data storage medium  
The invention presents systems and methods for initializing the phase-change layer of an optical medium. The methods include alternately quenching the phase-change material into amorphous states...
7120095 Apparatus for generating seek direction detecting signal using track error and track cross signals for an optical pickup  
An apparatus to generate a seek direction detecting signal for an optical pickup to determine a position of a center of an optical spot focused on an optical disk relative to a center of a track,...
7116612 Optical pickup device driven by an error signal obtained from an optical detector's output signals  
A light beam from a light source is introduced to a grating element of a pickup device to create zero order diffracted light, ±first order diffracted light, and ±second order diffracted light. An...
7116613 Optical beam position active sensing and control using satellite beams  
A beam position control system controls a position of a beam directed from a beam source. The beam position control system includes a beam position sensing system that generates one or more...
7113471 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...
7113459 Optical device, information recording/reproducing apparatus using the optical device  
An optical device and an information recording/reproducing apparatus using the optical device are disclosed. Incident light is output to a path selected from a plurality of paths so that an optical...
7099243 Optical pickup apparatus, optical disc apparatus, and tracking control method thereof  
After making such adjustment that an a main push-pull signal MPP offset can be made zero when a main beam is positioned at the center of a main photoreceptor, using electric signals E and F...
7092325 Method of arranging optical pickup system and optical recording and/or reproducing apparatus having the arranged optical pickup system  
A method of arranging an optical pickup system on a deck of an optical recording and/or reproducing apparatus, which enables detection of a tracking error signal using one photodetector based on a...
7076100 Method and apprartus thereof for detecting a hidden image in a hologram  
An apparatus for detecting a hidden image, which is formed in a first area of a hologram, is disclosed. The apparatus has a laser device for generating a laser beam and projecting the laser beam to...
7075879 Optical pickup device and a method to control an angle between a pit and a major axis of a laser beam  
An optical pickup device for a relatively thick disc and/or a relatively thin disk including first and second laser light sources emitting first and second light beams, a first grating splitting...
7075865 Optical pickup  
An optical pickup includes a semiconductor laser for emitting light at a wavelength λ 1 and a semiconductor laser for emitting light at a different wavelength λ 2 from the wavelength λ 1. The...
7072268 Optical pickup apparatus, optical disk apparatus, and tracking error signal detection method  
An optical disk apparatus of this invention includes a light source, an objective lens which focuses a laser beam output from the light source onto an optical disk, a hologram which divides an...
7068571 Optical recording apparatus and control method thereof  
An optical system of an optical recording apparatus forms a main spot and sub-spots preceding and succeeding the main spot on a signal recording medium. The optical system is set such that the...
7061852 Recording apparatus for a holographic recording medium including an alignment laser having a different wavelength from the recording laser  
A recording apparatus for holographic recording medium having an alignment mark and designed to irradiate a recording light beam onto a recording region of holographic recording medium to record...
7057994 Apparatus and method for reproducing information from two types of optical disks having discrimination marks formed along tracks thereof  
When information is reproduced in an optical disk of high recording density or of low recording density, a main beam and sub-beams are emitted onto adjacent tracks. The main beam has a shape longer...
7042826 Optical pick-up apparatus achieving high numerical aperture, optical converging system therefor, and recording and/or reproducing method utilizing them  
An optical pickup apparatus for recording and/or reproducing information for an optical information recording medium having a plurality of information recording layers, comprising: a light source...
7035174 Optical disc drive and optical pickup apparatus that correct astigmatism  
An optical disc drive compatible with optical discs of different types, for example, is provided. For focusing, through an optical system used in common with the different types of optical discs, a...
7027369 Optical pickup apparatus for simultaneously reading data from a plurality of tracks of an optical disc  
An optical pickup apparatus ( 10 ) for reading data from a plurality of tracks of an optical disc ( 34 ) at the same time by focussing spots (M, . . . ) of each light beam on a plurality of tracks,...
7023767 Gain calibration device and method for differential push-pull tracking error signals  
A gain calibration device and method for differential push-pull (DPP) tracking error signals in an optical storage system is provided. The gain calibration method processes the synthesized gain...
7016271 Optical recording/playback apparatus and optical recording medium  
An optical recording/reproducing apparatus comprises a light beam emitting unit which emits a plurality of light beams to the recording medium, a photodetection unit which detects the reflected...
7002881 Light receiving amplification element  
The object of the invention is to provide a light receiving amplification element applicable to an optical pickup apparatus comprising a semiconductor two-wavelength laser element and one...
6999657 High density optical data storage  
A data storage apparatus includes an array of optical fibers. The array has a first end and a second end. The first end of the array includes multiple optical fiber ends, each optical fiber end...
6999387 Disk reproducing apparatus and disk type identifying method  
With a CD laser, a focusing search is carried out to detect a value CD-FE(pp) which is a difference between a maximum value and a minimum value of a focusing error signal, and to detect a value...
6992955 Optical disc reproducing apparatus and tracking servo mechanism for an optical disc  
At a timing when a spot M of a main beam enters a defective area N of an optical disc, the tracking servo control is stopped, and the position the spot M of the main beam is held to the current...
6985424 Laser module and optical head  
An optical head in which a plurality of semiconductor laser chips are adhered on a mount surface perpendicular to the tracking servo direction of a focusing lens. Fluctuation of an optical spot...
6980496 Information recording/reproducing apparatus  
An information recording/reproducing apparatus includes an optical device, a photo-detector and a calculation unit. The optical device irradiates light beams, including one main beam and at least...
6967908 Optical pickup device with focus error detecting optical element and method for focus error detection  
An optical pickup device for focusing a light beam includes a focus error detecting optical element which splits and leads return light to a photodetector. The focus error detecting element has an...
6963522 Optical head apparatus and optical information recording and reproducing apparatus  
Light emitted from a laser is separated into a main beam, first sub beams, and second sub beams. The distribution intensity of each first sub beams is the same as that of the main beam. The...
6961292 Apparatus generating a seek direction detecting signal for an optical pickup using track cross and track error signals  
An apparatus generating a seek direction detecting signal includes a light dividing unit dividing an incident light beam into at least two beams having a main beam and a sub-beam so that at least...
6956192 Optical head and optical disk drive  
A DVD laser emits a first light beam, and a CD laser emits a second light beam. An optical diffraction element diffracts first and second reflected lights corresponding to the first and second...
6947367 Single means for converting beam widths of plural laser beams with different entry and exit angle with offset  
A low-profile optical disk device which performs recording and reproducing using a plurality of laser light sources with different wavelengths, without thug need for additional components. It is...
6940805 Methods and apparatus for cross-talk and jitter reduction in multi-beam optical disks  
Methods and apparatus are provided for reducing cross-talk and jitter caused by track offsets in multi-beam optical disks. The method and apparatus involve using split detectors and cross-talk...
6925036 Optical pickup apparatus and optical parts accommodation module for optical pickup  
An optical pickup apparatus ( 100 ) is provided with: a carriage body ( 80 ); an optical parts accommodation module ( 70 ) mounted on said carriage body and accommodating at least (i) a light beam...
Matches 51 - 100 out of 543 < 1 2 3 4 5 6 7 8 9 10 11 >