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US20050201246 Particle-optical projection system  
In a particle-optical projection system (32) a pattern (B) is imaged onto a target (tp) by means of energetic electrically charged particles. The pattern is represented in a patterned beam (pb) of...
US20110019519 OPTICAL DISC RECORDING METHOD AND OPTICAL DISC APPARATUS  
This document relates to a method of compensating for a sensitivity variation of a tracking actuator with focusing offset when recording labels on a disc for label recording. A focusing point...
US20060072417 Device for reducing power consumption of optical drive and method for the same  
A device and method for reducing power consumption of an optical drive are proposed. The present invention samples a carrier control signal and then compares the samples of the signals with...
US20050190662 Read/write head for optical disk drive and optical disk drive comprising such a read/write head  
A read/write head for a optical disk drive, comprises a lens holder (8), a support frame (11 12, 16), means (15) for suspending the lens holder (8) in the support frame which means constrain...
US20060083126 Methods and apparatuses of half-wave layer jump control for optical disk drive  
An apparatus for controlling half-wave layer jumping of a pickup head of an optical disk drive includes a half-wave layer jump controller and an output logic unit. The controller receives a focus...
US20080056079 OPTICAL DISC DRIVE AND METHOD OF CONTROLLING THE SAME  
An optical disc drive and a method of controlling the same. The optical disc drive includes: a pickup module to apply a laser beam to a surface of a record layer of an optical disc, and forming a...
US20050259525 Method and apparatus for identifying an optical disc in an optical storage system  
An apparatus is adapted for identifying an optical disc loaded in an optical storage system that is capable of generating a wobble signal corresponding to a detected wobble track of the optical...
US20060114766 Wobbling signal reproduction device  
A wobbling signal reproduction device has a first low-pass filter, a second low-pass filter, a first auto gain control circuit, a second auto gain control circuit, a subtraction circuit unit and a...
US20110310714 SENSORLESS MOTOR DRIVE DEVICE  
A sensorless motor drive device has: a first operation mode of generating current waveforms including non-energizing times based on a first rotor position signal generated by detecting zero...
US20110122753 METHOD FOR DETERMINING FOCUS HEIGHT  
A method for determining a focus height of an optical disc drive is provided. A disc is placed into the optical disc drive. An objective lens is moved to lock a focus on a data layer of the disc....
US20100054099 Optical Disc Apparatus and Focus Offset Setting Method Thereof  
An optical disc apparatus in which, regarding mutually adjacent recording layers, a focus offset of an optical system to a guide groove formed in a recording surface of the recording layer is...
US20130003512 OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS EQUIPPED WITH THE SAME  
An optical pickup device includes a light source for emitting a light beam, an objective lens for collecting the light beam which is emitted and for irradiating an optical disc with the collected...
US20110176403 OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING DEVICE, AND SIGNAL DETECTION METHOD  
An optical head device includes a light source (30) configured to emit a light beam, a light collecting optical system configured to converge the light beam onto an information recording medium...
US20080013428 Servo System, Record Carrier and Playback Device  
To improve the performance of a servo system, used for tracking a track on a record carrier, the bandwidth of the servo system must be adjusted. Instead of injecting a signal into the servo system...
US20050083818 Error measuring device for optical disk drive mechanism  
An error measuring device for optical disk drive mechanism is disclosed. The device is used to detect the assembly status of the spindle motor and the optical pickup head guide rods in an optical...
US20140321253 TEST DEVICE AND TESTING METHOD FOR TESTING FOCUS FUNCTION OF EXTERNAL DEVICE  
A test device communicates with an external device with a plurality of parameters. The test device includes a setting module, a first determining module, a focus module, and a prompting module....
US20110158078 OPTICAL PICKUP DEVICE AND FOCUS JUMP METHOD  
In an optical pickup device and a method of a focus jump, in order to make optimum correction of spherical aberration responsive to the position of a recording layer at one end nearer a target...
US20100254239 METHOD FOR ADJUSTING TILT OF OPTICAL PICK-UP HEAD  
The present invention relates to a method for calibrating a focus position of an optical pick-up. The optical pick-up is located on a focus position at a preset distance from a recordable optical...
US20090046554 OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCING APPARATUS EQUIPPED WITH SAME  
[Problems] To provide an optical head device capable of obtaining a desirable track error signal and a lens position signal for both two types of optical media having different groove pitches....
US20130107685 OPTICAL DISC DEVICE  
An optical disc device includes: a diffraction element receiving as input reflected light from an optical disc recording medium, including a first diffraction area formed in a position where light...
US20120113784 OPTICAL PICKUP  
An optical pickup having a first diffractive optical element that acts on light of a specific wavelength, the first diffractive optical element being arranged in an optical path for guiding...
US20050073928 [OPTICAL MEDIUM STORAGE READING DEVICE]  
An optical storage medium reading device comprising an optical storage module, a light-switching module, a wave-distance-dividing module and an optical sensor module is provided. The optical...
US20070104047 Optical disc drive and focus control method thereof  
An optical disc drive and a focus control method thereof. If a summation signal exceeds a threshold value, an object lens of the optical disc drive is moved towards the optical disc for a first...
Matches 1 - 23 out of 23