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| Application No. | Application Title | Issue Date |
| 20120106307 | OPTICAL DISC APPARATUS AND DEFOCUS CORRECTING METHOD An optical disc apparatus in which a bias of a focusing error signal is changed to a value according to a recording power at timing corresponding to a predetermined address position before starting the recording and a defocus of an opposite polarity is preliminarily cau... | 05/03/2012 |
| 20120106306 | INTEGRATED CIRCUIT AND OPTICAL DISC APPARATUS An integrated circuit is provided in an optical disc apparatus for drawing a visible image on an optical disc including a discoloration layer which is discolored by heat or light by irradiating the optical disc with laser light. The integrated circuit includes a trackin... | 05/03/2012 |
| 20110292776 | OPTICAL DISC APPARATUS AND OPTICAL DISC DISCRIMINATING METHOD In an optical disk having multiple layers for which a correction of spherical aberration is required, a spherical aberration correcting element is set to a predetermined spherical aberration correction amount; a laser light source is turned ON; an objective lens is swep... | 12/01/2011 |
| 20110211429 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE An optical pickup device includes a plurality of laser light sources emitting laser beams of different oscillation wavelengths, and a plurality of objective lenses on which the laser beams in the form of diverging beams emitted by the plurality of laser light sources ar... | 09/01/2011 |
| 20110182159 | OPTICAL PICKUP An optical pickup includes a light source, an objective lens, a diffraction grating that divides an optical beam reflected from a predetermined information layer, into a plurality of optical beams, and a detector having a plurality of photo-receivers to receive a plural... | 07/28/2011 |
| 20110134731 | OPTICAL DISC APPARATUS AND DEFOCUS CORRECTING METHOD An optical disc apparatus in which a bias of a focusing error signal is changed to a value according to a recording power at timing corresponding to a predetermined address position before starting the recording and a defocus of an opposite polarity is preliminarily cau... | 06/09/2011 |
| 20110110204 | VARIABLE MIRROR ACTUATOR AND OPTICAL DISC DRIVE A pickup and a drive, in a small size, having a spherical aberration correction device capable of correcting various spherical aberration, and coma aberration and/or astigmatism with a low power consumption. A variable-focus lens actuator can correct spherical aberratio... | 05/12/2011 |
| 20110096646 | Reproducing System for Use With Optical Devices A reproducing system reproduces data recorded on an optical record carrier. The system includes a light source driver unit that modulates and controls a light output by a light source, such as a laser, in order to read data from an optical record carrier. The system is ... | 04/28/2011 |
| 20110051574 | OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE USING THE SAME Of the beams reflected by an optical disk, only peripheral beams excluding the push-pull region are used to generate a DPD signal in order to optimize internal wire connections among the light receiving areas of the optical detector and thereby reduce the amplification ... | 03/03/2011 |
| 20100296374 | APPARATUS AND METHOD FOR INITIALIZING INFORMATION RECORDING MEDIUM, APPARATUS AND METHOD FOR RECORDING INFORMATION, AND INFORMATION RECORDING MEDIUM An initialization apparatus that has a simplified configuration and that forms an initial hologram in an information recording medium is provided. An initialization apparatus (10) rotates an optical disk (100) and emits blue light beams (Lb1) and (L... | 11/25/2010 |
| 20100195455 | OPTICAL DISC APPARATUS, FOCUS ERROR SIGNAL ADJUSTMENT METHOD, PROGRAM, AND INTEGRATED CIRCUIT To adjust the symmetry of a focus error signal, the symmetry of the focus error signal needs to be measured during upward and downward driving of an objective lens, which is performed at every varying setting of a signal correction gain value of the focus error signal, ... | 08/05/2010 |
| 20100177606 | METHOD FOR IDENTIFING A LAYER NUMBER OF AN OPTICAL DISC A method for identifying a layer number of an optical disc is provided. Firstly, a SA value is adjusted to a standard SA value of each of two data layers in sequence. Next, focusing courses are performed so as to enable the focus point to pass through the optical disc. ... | 07/15/2010 |
| 20100110846 | METHOD AND APPARATUS FOR CONTROLLING POSITION IN WHICH DATA IS TO BE RECORDED A method and apparatus to control a position in which data is to be recorded on a holographic data recording medium by using interference between a reference light and a signal light, the method including: irradiating the reference light and the signal light on the holo... | 05/06/2010 |
| 20100061203 | METHOD AND APPARATUS FOR RECORDING AND/OR REPRODUCING DATA INTO AND/OR FROM OPTICAL DISK Provided are a method and apparatus for recording and/or reproducing data into and/or from an optical disk. The apparatus includes a reference beam optical system to form a focus of a reference beam in an optical data storage layer of the optical disk and including an o... | 03/11/2010 |
| 20100061202 | OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS In the optical pickup device, while reflection light reflected from the optical multi-layer disc is divided into a plurality of regions so as to produce a plurality of divided optical beams, the divided optical beams are focused onto different positions on a photodetect... | 03/11/2010 |
| 20100027384 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND ERROR SIGNAL GENERATION METHOD A diffractive optical element generates main and two sub beams from an output light of a light source. An objective lens focuses the main and two sub beams on an optical recording medium. An optical detector receives the main and two sub beams reflected by the optical r... | 02/04/2010 |
| 20090323482 | ABERRATION CORRECTION ELEMENT An aberration correction element including a diffraction plane that corrects a spherical aberration caused by the difference among a first optical recording medium, a second optical recording medium, and a third recording medium by transmitting first beams of light havi... | 12/31/2009 |
| 20090323480 | OPTICAL STORAGE SYSTEM AND SPHERICAL ABERRATION COMPENSATION APPARATUS AND METHOD THEREOF An optical storage system and a spherical aberration (SA) compensation apparatus and method thereof are provided. The SA compensation apparatus includes a microprocessor and a digital-signal-processor (DSP). The microprocessor regulates a compensation value of an SA com... | 12/31/2009 |
| 20090323481 | DRIVE APPARATUS AND TRACK JUMP METHOD A drive apparatus includes a light irradiation section for applying light from a light source via an object lens on a hologram recording medium having a recording layer on which a hologram is formed and a track formation layer on which an address recording track compose... | 12/31/2009 |
| 20090290456 | OPTICAL DISC DEVICE, METHOD FOR ACTIVATING OPTICAL DISC DEVICE, AND CONTROL CIRCUIT An optical disc device includes: a light source; a condensing system including a solid immersion lens for emitting light from the light source onto an optical disc; a gap control circuit for setting a distance between the solid immersion lens and the optical disc to a c... | 11/26/2009 |
| 20090285059 | APPARATUS FOR INITIALIZING AND METHOD OF MANUFACTURING OPTICAL DISC, AND INITIALIZATION REFERENCE PLATE An embodiment of the present invention includes rotating an integrated disc formed by temporarily fixing an initialization reference plate to an uninitialized optical disc that is an optical disc to be irradiated with a light beam of light having a predetermined or high... | 11/19/2009 |
| 20090274020 | OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS An optical head unit is configured as an optical head unit corresponding to an optical recording medium of BD standard, and an optical recording medium of HD DVD standard. A magnification-variable lens includes convex lens, concave lens, and convex lens. The magnificati... | 11/05/2009 |
| 20090238048 | METHOD AND APPARATUS FOR COMPENSATING ASTIGMATISM IN AN OPTICAL STORAGE SYSTEM The present invention discloses a method and an apparatus for compensating astigmatism in an optical storage system. Firstly, the optical storage system focuses on an optical disc and proceeds track seeking. While track seeking, the astigmatism compensator continues adj... | 09/24/2009 |
| 20090231965 | Method for setting spherical aberration correction and device using the method A method for setting the spherical aberration correction of a scanning beam in a device for scanning an information layer of an optical record carrier. The method comprises the following steps: converging the scanning beam (16) to a focus (17) in the optic... | 09/17/2009 |
| 20090168614 | SPHERICAL ABERRATION CORRECTION APPARATUS AND SPHERICAL ABERRATION CORRECTION METHOD According to one embodiment, a spherical aberration correction apparatus includes a pickup which applies laser light to an optical disk through an objective lens, a photodetector which detects laser light incident through the objective lens as reflected light from the o... | 07/02/2009 |
| 20090147631 | Optical Disk Image Forming Device, Optical Disk Image Forming Method and Optical Disk When an image is formed on an optical disk, an optical disk image forming device reads information written in an information area of the optical disk. When a reflection preventing process is applied to an image forming area of the optical disk, the optical disk image fo... | 06/11/2009 |
| 20090141598 | Apparatus for Adjusting Focus Offset and Method Thereof The present invention provides an apparatus of an optical disc drive for adjusting a focus error signal. The apparatus includes a focus offset determining unit and an adjusting module. The focus offset determining unit is utilized for determining a target focus offset c... | 06/04/2009 |
| 20090135684 | Defocus Detection Device, Defocus Detection Method and Optical Disk Unit Using the Same Defocus detection device and method capable of detecting a defocus accurately during recording of information to an optical disk having a plurality of recording layers and an optical disk unit using the device and method are provided. A temporal restriction is imposed o... | 05/28/2009 |
| 20090129217 | OPTICAL INFORMATION RECORDING APPARATUS A rewritable optical disk apparatus, optical information recording and reproducing apparatus or the like is allowed to automatically and properly adjust the optical system to the optimum focal condition regardless of the readout signal detector's positional error and th... | 05/21/2009 |
| 20090122662 | Optical pickup A spherical aberration correction mechanism includes an aberration correction lens, a movable portion for supporting the aberration correction lens, a fixing portion for supporting the aberration correction lens, in which the movable portion is disposed in a slidable ma... | 05/14/2009 |
| 20090116346 | OPTICAL RECORDING/PLAYBACK DEVICE AND MEDIUM DIFFERENTIATION METHOD There is provided a recording/playback device able to differentiate the type of an optical disc or another such optical recording medium with a high degree of precision while correcting wavefront aberrations. The recording/playback device has a detection part for sequen... | 05/07/2009 |
| 20090109809 | LASER DRIVE DEVICE AND INFORMATION RECORDING/REPRODUCING APPARATUS USING THE DEVICE According to one embodiment, a laser drive circuit includes a photodetector which receives part of laser light emitted from a laser element to a recording medium independently of reflection laser light reflected by the recording medium, and outputs an output correspondi... | 04/30/2009 |
| 20090109808 | OPTICAL HEAD DEVICE AND INFORMATION According to one embodiment, a laser drive circuit which supplies a drive current to a laser element which outputs light at a predetermined wavelength, and a laser control circuit which supplies a predetermined timing pulse for generation of relaxation oscillation in a ... | 04/30/2009 |
| 20090092009 | Runout detection method A method for determining runout disc is disclosed. The method comprises: focusing on a focal point on a disc; driving the disc to spin the disc; generating a crossover signal according to a track of the disc crossing the focal point; and determining that the disc is a r... | 04/09/2009 |
| 20090086591 | OPTICAL DISC APPARATUS AND DETERMINATION METHOD OF OPTIMUM FOCUS POSITION An optical disc apparatus includes: a light irradiation unit irradiating light to an optical disc to record and reproduce data; a focus position adjustment unit adjusting a focus position of the light irradiated from the light irradiation unit to the optical disc; a mea... | 04/02/2009 |
| 20090080298 | OPTICAL HEAD, OPTICAL HEAD MANUFACTURING METHOD AND OPTICAL DISC DEVICE It is aimed to provide an optical head, an optical head manufacturing method and an optical disc device capable of correcting coma aberration generated due to different positions of emission points of a plurality of laser lights having different wavelengths. 03/26/2009 | |
| 20090073825 | Optical pick-up, aberration correcting method, optical pickup program, information recording device and method, information recording program, information reproducing device and method, information reproducing program, and information recording medium The invention is to provide an optical pickup capable of performing a track search operation accurately by reducing noise occurring in a focus servo system during the track search operation and also accurately recording/reproducing information to/from an optical disk. | 03/19/2009 |
| 20090073851 | APPARATUS AND METHOD FOR RECORDING/REPRODUCING HOLOGRAPHIC DATA AND HOLOGRAPHIC DATA STORAGE MEDIUM A method and apparatus for recording and/or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and/or reproducing holographic information includes an optical pickup emitting light onto a holographic information... | 03/19/2009 |
| 20090073824 | Optical Disc Drive An optical disk apparatus according to the present invention includes: a light emission section for emitting laser light; an optical system for irradiating the optical disk medium with the laser light; and an aberration control section for controlling aberration of the ... | 03/19/2009 |
| 20090067299 | Focus controlling method and optical disk drive using the focus controlling method An apparatus and method control a disk drive servo, and more particularly, an apparatus and method control a servo when moving between layers of a disk in a multi-layered disk drive. A focus controlling method, as an example of the servo controlling method, includes the... | 03/12/2009 |
