Matches 1 - 50 out of 216 1 2 3 4 5 >


Match Document Document Title
US20080008061 Spot Aberrations in a Two-Dimensional Optical Storage System  
Thus, in conventional, one-dimensional optical storage, the data is arranged in a linear fashion and is read out by a single spot (102). In order to increase data rates and storage capacity, it...
US20080175111 Disc Device and Control Method for the Same  
Provided is an optical disc device and a control method for the same that are capable of shortening processing time for spherical aberration correction amount adjustment. The optical disc device...
US20070217303 Seatbelt lens control during rough seek  
An apparatus comprising a lens, a stepper motor and a tracking error controller. The lens may be positioned in a sled housing. The stepper motor may be configured to (i) move the sled housing in...
US20110110208 COMA ABERRATION COMPENSATING DEVICE, COMA ABERRATION COMPENSATING METHOD, AND OPTICAL DISC  
A method for compensating the coma aberration in a pickup of a recording and reproducing device that records or reproduces data on or from an optical disc using the pickup is provided. The method...
US20110235483 DISC APPARATUS  
A disc apparatus is disclosed that includes a jitter-value detection unit configured to detect a jitter value based on a signal to be read from a medium. A detrack-value setting unit is configured...
US20100008196 ABERRATION CORRECTING APPARATUS  
In optical disc systems, read-out is hampered because of spherical aberrations resulting from cover layer thickness variations or because discs consists of multiple layers. The aberration...
US20090073826 OPTICAL DEVICE FOR SCANNING AN INFORMATION CARRIER  
An optical scanning device for scanning an information carrier. The device includes an array optical element arranged to generate an array of radiation spots from an incident radiation beam, for...
US20070147199 TILT DETECTING DEVICE AND METHOD  
An information recording and/or reproducing apparatus includes an optical head, an analog signal processor, an analog/digital converter, a controller and a digital/analog converter. The optical...
US20060181975 Cross-talk cancellation scheme for rll-based storage systems  
The invention relates to Run length Limited-codes storage systems. In modern storage systems, the inter-track spacing is chosen to be relatively small to allow for high storage densities. As a...
US20120300604 DISK DRIVE  
A disk drive determines, from eccentric amounts of individual prescribed rotation phases for one round of an optical disk 1, a rotation phase range in which a lens shift amount after tracking...
US20090135685 ABERRATION CORRECTING APPARATUS AND PROGRAM FOR CORRECTING ABERRATION  
An aberration correcting apparatus is provided, which is capable of suppressing occurrence of abnormal operation in an actuator for a tracking servo by reducing track cross noise caused by...
US20070291609 TILT ERROR DETECTING DEVICE, TILT CALIBRATING DEVICE, AND METHODS THEREOF FOR OPTICAL STORAGE DEVICE  
The present invention discloses a tilt error detecting device for detecting a tilt error signal indicative of a tilt error between an optical disc and an optical pick-up head. The tilt error...
US20110096647 Optical Disc Apparatus  
An optical disc apparatus including means for calculating a spherical aberration correction quantity of an object lens, reproduced information signal generation means and spherical aberration...
US20060087935 Tilt adjusting mechanism and disc drive using the same  
A tilt adjusting mechanism for a disc drive is provided. The disc drive includes at least one guiding shaft for supporting and guiding a pickup head. The tilt adjusting mechanism includes a first...
US20070014210 Optical pickup apparatus for optical disc  
In an optical pickup apparatus, a collimator lens is rockably supported by edges of two protruding portions formed on opposing sides of a groove of an optical base. The collimator lens is urged...
US20070165500 Optical pickup, optical disc drive employing it, and its control method  
The present invention is directed to an optical pick-up device in which two object lenses are mounted to optimally correct comatic aberration with respect to the respective object lenses, which...
US20080068940 METHOD FOR LOCKING ONTO A TRACK AFTER AN OPTICAL PICKUP OF AN OPTICAL DISC DRIVE PASSES THROUGH A DEFECTIVE SECTION OF AN OPTICAL DISC  
An optical disc drive generates a control signal according to the delay of a TZC signal. The control signal can determine if an optical pickup of the optical disc drive crosses a track. When the...
US20050195703 Objective lens drive device and optical head device provided with the same  
An objective lens drive device includes an objective lens, a lens holder having a lens holding part for holding the objective lens on one side end part of the lens holder, a focusing and tracking...
US20100074067 OPTICAL DISK DRIVING APPARATUS, OPTICAL DISK DRIVING SYSTEM, VEHICLE EQUIPPED WITH OPTICAL DISK DRIVING SYSTEM, METHOD OF CORRECTING SPHERICAL ABERRATION IN OPTICAL DISK DRIVING APPARATUS, PROGRAM AND RECORDING MEDIUM  
An optical disk driving apparatus includes an optical head device having a laser light source, a converging optical system converging a light beam emitted by the laser light source onto an optical...
US20090116348 OFF-TRACK DETECTION CIRCUIT  
In a state where vibration is constantly detected, a protection function by a vibration detection circuit loses effectiveness, and thereby there may possibly arise a malfunction of an off-track...
US20090168616 SPHERICAL ABERRATION COMPENSATION METHOD OF OPTICAL STORAGE DEVICE  
A spherical aberration compensation method of an optical storage device is provided. The method includes: deriving a first spherical aberration compensation value corresponding to a first track...
US20050276196 Optical disc device capable of compensating for skew of optical pickup and method thereof  
An optical disc device capable of recording/reproducing data in an optical disc. The optical disc device includes an optical pickup unit for scanning a laser signal onto a specified area of an...
US20080285399 Recorder, Player, and Recorder/Player  
An apparatus according to the present invention includes a write compensation section, which generates a write signal to write information on an information storage medium, and a writing section...
US20090154312 Drive Signal Generation Circuit  
A drive signal generation circuit comprising: a tracking signal output circuit to output a tracking signal based on an error signal indicating a track deviation of laser light output from the...
US20070081433 TILT ADJUSTMENT SYSTEM AND METHOD OF OPTICAL DISK DEVICE  
The present invention discloses a tilt adjustment system and method of an optical disk device with a pickup head, which includes a decoder for decoding the encoded information from an optical disk...
US20090097367 OPTICAL AXIS SHIFT CORRECTING DEVICE AND METHOD, AND COMPUTER PROGRAM  
An optical axis shift correcting device is provided in an optical information device including irradiation means (11) for applying a laser, an optical system (12, etc.) for guiding a laser applied...
US20050128902 OPTICAL DISC SYSTEM AND ASSOCIATED TILT ANGLE CALIBRATION METHOD  
A controllable tilt servo adjusts a tilt angle between an optical disc and an object lens according to a control signal from a CPU. An optical electric integrated circuit (OEIC) generates a...
US20090147632 OPTICAL DISC DRIVE APPARATUS  
In an optical disc drive apparatus, when a start time of a tracking pull-in operation is adjusted according to the eccentricity amount of the optical disc, a suitable starting point of the...
US20090190449 OPTICAL HEAD TRANSFER DEVICE, INTEGRATED CIRCUIT FOR OPTICAL HEAD TRANSFER DEVICE, FOCUSING LENS DRIVING DEVICE, AND INTEGRATED CIRCUIT FOR FOCUSING LENS DRIVING DEVICE  
When transferring an optical head in a radial direction of an optical disc, the optical head is initially transferred with a speed profile of a larger acceleration, and when abnormality is...
US20080049572 Spherical aberration correcting device  
A spherical aberration correcting device includes liquid crystal, a first transparent electrode and a second transparent electrode. The first transparent electrode works as a common electrode. The...
US20090185463 DIFFRACTION GRATING, OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS  
A pickup device splits and detects a light beam reflected from a disc with the use of a grating. The grating has first to six areas, wherein the first area and the second area, the third area and...
US20070030775 HDD sector format with reduced vulnerability to defects and burst errors  
Modified HDD sector formats have multiple sets of preamble data. The preambles are well separated so that any defect long enough to wipe out both preambles would also overwhelm the ECC.
US20050024997 Optical recording disk device and manufacturing method therefor  
An optical recording disk device includes an optical head mechanism provided with an optical system for converging an emitted light beam from a light source on an optical recording disk, a frame...
US20050083816 Tilt sensor and optical disk drive  
A tilt sensor includes a photodetector having a photosensitive plane and detecting a light beam in multiple areas and outputting detection signals representing its intensities and a tilt detector...
US20080056080 Alignment feature for near-field transducers  
An apparatus comprises a lens, an alignment feature positioned adjacent to a surface of the lens, a detector for producing an alignment signal in response to a portion of incident light reflected...
US20080310263 COMPENSATION VALUE SETTING DEVICE AND COMPENSATION VALUE SETTING METHOD  
A compensation value setting device selects, based on the first and second index values calculated by the first and second index value calculation sections for each combination of the spherical...
US20050190668 Optical recording/reproduction apparatus having mechanism for correcting spherical aberration  
For preventing incorrect operations of recording and reproduction of information in accordance with a spherical aberration occurred in an objective lens, the optical recording/reproduction...
US20070030774 Disc drive apparatus, and tilt compensation method  
A method is described for compensating tilt (0) of an optical disc (2). An optical lens (34), which is pivotably mounted, is pivoted to an optimum pivot position (WoPT) such that the amplitude...
US20050073924 Controlling rotational speed of an optical disc based on detected eccentricity  
A method, program, apparatus, and medium for determining and controlling a rotational speed of an optical disc, capable of suppressing the influence from disc eccentricity, and an optical disc...
US20070104063 Tilt compensation method and apparatus  
Provided is a tilt compensation method and apparatus that effectively compensates for a tilt of an information storage medium. The tilt compensation method includes calculating a tilt value at...
US20050249061 Optical disc device  
An optical disc device includes an optical pickup for irradiating optical discs with laser and detecting light reflected by the disc to generate received light signals, optical pickup driving...
US20090180362 Method and Apparatus for Deciding Spherical Aberration Compensation Value  
A method and an apparatus for deciding a spherical aberration compensation (SAC) value for an optical storage medium are provided. The optical storage medium comprises at least one recording layer...
US20050185535 Tilt compensating apparatus and method and optical recording and reproducing apparatus using the tilt compensating method  
A tilt compensation apparatus and method minimizes a coma aberration generated due to a tilt of an optical disc by canceling a tilt offset amount of a tilt sensor. An objective lens converges a...
US20080089194 Optical pickup, optical disk drive, optical information recording/replaying device, and tilt adjusting method  
There is provided a tilt correction processing method which can reliably detect the amount of tilt in a short time and adjust it, and then recording or replaying is started in a short time by...
US20100034061 OPTICAL STORAGE APPARATUS AND CONTROL CHIP FOR ACCESSING AN OPTICAL DISC AND METHOD THEREOF  
An optical storage apparatus includes an optical pickup head, a drive module, a spherical aberration compensator, and a controller module. The drive module is coupled to the optical pickup head...
US20090323483 Acting Track-Crossing During Tracking Error Adjust  
A method for enhancing the optical initializing operation comprises: sending a radial error signal from an optical pick-up unit to a radial error signal calibration unit; sending the radial error...
US20050135208 Optical system for optical disc  
There is provided an optical system for an optical disc which requires a numerical aperture larger than or equal to 0.60. The optical system is provided with a light source, an objective lens, and...
US20070053257 Method of controlling optical disc device  
In an optical disc device according to the present invention, a vibration detecting band of a vibration detector for detecting variations in the optical disc device is set to a band capable of...
US20080285398 Tracking Error Signal Calibration Method, and Disc Drive Implementing Such Method  
A method for generating a calibration value for a tracking error signal in an optical disc drive comprises the steps of performing a plurality of N jumps towards respective target tracks of an...
US20090161504 OPTICAL DISC DRIVE DEVICE AND TILT CORRECTION DEVICE  
An optical disc drive device has an FE signal generator which generates a focus error signal, a TE signal generator which generates a tracking error signal, a return beam detector which detects a...

Matches 1 - 50 out of 216 1 2 3 4 5 >