Patent application number | Description | Published |
20080219131 | Objective Lens - The invention concerns an objective lens for use with a dual layer optical information carrier. Such a carrier as used in Blu-ray Disks (BD) has a first information layer at a depth D | 09-11-2008 |
20080298209 | FOCUSING CONTROL METHOD FOR READING/WRITING OPTICAL DISC - An optical reading/writing apparatus has an optical head that includes a collimator and a lens. For efficient and reliable focusing control for writing an empty optical disk, calibration of focus offset and spherical aberration is executed by setting a boundary and performing data-reading in an OPC area only with combinations of focus offset and spherical aberration within the boundary. Accordingly, an optimum combination of focus offset and spherical aberration is determined for focusing compensation in subsequent writing operation of the empty disk. | 12-04-2008 |
20090213710 | REPRODUCING INFORMATION FROM ANINFORMATION CARRIER - The invention described is an apparatus for reproducing information from an information carrier ( | 08-27-2009 |
20090252008 | ANALYSIS OF OPTICAL EFFECTS ON STORAGE MEDIUM - A method of analyzing the quality of optical effects on an optical recording medium as well as applications of the method in connection with optimizing a write strategy and analyzing the write quality for an optical recording medium are disclosed. The method comprising the steps of determining waveforms of a measured and a nominal optical signal, and calculating an amplitude-difference parameter from a difference in the measured and nominal waveforms. A quality measure of the optical effects can thereby be determined from the amplitude-difference parameter. The applications of the method include, but are not limited to: a device for reading optical effects from an optical storage medium with means for determining the an amplitude-difference parameter, an optical recording apparatus with means for adjusting the power level and/or level duration in a write strategy and an IC for controlling an optical storage apparatus. | 10-08-2009 |
20090252010 | OPTICAL DISK DRIVE WITH DISK TYPE DETERMINATION AND METHOD OF DETERMINING A DISK TYPE OF AN OPTICAL DISK WITH AN OPTICAL DISK DRIVE - An optical disk drive and a method for determining a disk type are described. The optical disk drive may be arranged to receive a radial error signal while an incident beam is focused onto the optical disk and before tracking the track, to analyze the radial error signal for detecting whether a wobble signal is present, indicating whether the track is wobbled, and to derive a disk type from the wobble signal, if present. The optical disk drive may additionally or alternatively be arranged to receive a central aperture signal while the incident beam is focused onto the optical disk and before tracking a track including a sequence of embossed pits, to analyze the signal amplitude of the central aperture signal, and to determine the disk type from at least a first variation of the signal amplitude of the central aperture signal as a function of time. | 10-08-2009 |
20090290468 | INFORMATION REPRODUCING METHOD - The present invention relates to an information reproducing method for reproducing information recorded on an information recording carrier with several information layers by radiating light onto the carrier being e.g. an optical disc. The method comprises the step of 1) focusing the light at a first information layer or a second information layer, where the first layer and the second layer are adjacently positioned in the information recording carrier, 2) performing radial tracking on the reflected light from the information recording carrier, and 3) assessing form the radial tracking if the light is focussed on a clockwise or a counter-clockwise oriented spiral relative to the focussed light. In a particular embodiment, the assessment of whether the light is focussed on a clockwise or a counter-clockwise oriented spiral relative the light is utilized for indicating the identity of the layer on which the light is focussed. The invention also relates to an optical apparatus for implementing the method of the invention. | 11-26-2009 |
20090310453 | OPTICAL DRIVE AND READ POWER ESTIMATION METHOD - A method of determining a maximum allowable read power for a drive-record carrier combination is described. The method finds a forward-sense setpoint value to control a light power control loop, by reading data from the record carrier at which degradation of the data occurs. This technique is useful for all optical storage devices such as CD, DVD and Blu-ray players and recorders. | 12-17-2009 |
20100157764 | FOCUS OPTIMIZATION ROUTINE WITH SUB-OPTIMAL JUMP SETTINGS IN OPTICAL DISC SYSTEMS - A method and system for obtaining focus optimization in an optical disc system is disclosed. The focus offset of a recording unit is set to a first of a plurality of predetermined values. A HF quality value is measured and stored for the selected focus offset value of the recording unit. The focus offset is then set to a best-known focus offset value. Tracks on the optical media being read are then jumped. The above steps are then repeated for each of the plurality of predetermined focus offset values. The optimal focus setting is then determined from the stored HF quality measurements. | 06-24-2010 |
20110075533 | DETECTION OF DATA IN BURST CUTTING AREA OF OPTICAL DISK - An apparatus generates outgoing data (OD) to be provided on an optical disk ( | 03-31-2011 |
20120273676 | METHOD FOR DETERMINING A RECONSTRUCTED IMAGE USING A PARTICLE-OPTICAL APPARATUS - The invention relates to a method for determining a reconstructed image using a particle-optical apparatus. The particle-optical apparatus comprises a particle source for producing a beam of particles, an object plane on which an object to be imaged may be placed, a condenser system for illuminating the object plane with the beam of particles, a projection system for forming an image of the object plane by imaging particles transmitted through the object on an image plane, and a detector for detecting the image, the detector comprising a semiconductor sensor having an array of pixels for providing a plurality of pixel signals from respective pixels of the array in response to particles incident on the detector. | 11-01-2012 |
20140064054 | DETECTION OF DATA IN BURST CUTTING AREA OF OPTICAL DISK - An apparatus generates outgoing data to be provided on an optical disk in a burst cutting area. The burst cutting area further comprises markings which cause a marking frequency spectrum when reading out the burst cutting area. The apparatus comprises a channel coder which receives processed data and supplies the outgoing data having an outgoing data frequency spectrum with suppressed DC-content. The apparatus further comprises a data processing device which generates the processed data to obtain an outgoing frequency spectrum wherein a frequency component causing interference with a low frequent component of the markings is suppressed or not present. | 03-06-2014 |