Matches 1 - 30 out of 30


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US20090135704 RETAINING BODY AND THE LIKE  
The present invention provides a retaining body and the like which adjust a diffraction state of a laser beam using a simple configuration. The retaining body of the invention is a retaining body...
US20090285076 Diffractive optical element and method of designing the same  
A transmissive or reflective diffractive optical element, comprising: a substrate having a top surface, the top surface being etched into a pattern, the pattern including a periodic surface...
US20080137513 OPTICAL PICKUP DEVICE  
A diffraction element is disposed between a beam branching element (such as a beam splitter) and a photodetector. The diffraction element further segment an interference fringe introduced into...
US20090109825 OPTICAL SCANNING DEVICE  
An optical scanning device (3) for scanning a record carrier (2) comprises an objective unit (20) and a diffraction element (14). The objective unit (20) is adapted to transmit an auxiliary...
US20090185472 Objective Optical System and Optical Information Recording/Reproducing Device Having the Same  
There is provided an objective optical system used for information recording/reproducing for three types of optical discs. The objective optical system includes an objective lens, and a...
US20090103417 OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCING APPARATUS  
There are obtainable reliable and proper tracking correction and CTC even when fluctuations occur in an irradiation position of a sub-beam in a track at the time of performing tracking correction...
US20100097917 DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL PICKUP  
An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and...
US20090122684 Disc Authentication by Grayscale Image in Data Area Obtained by Modulation Rule Variation (Old Title)  
The present principles provide a way to place a multilevel grayscale image, visible with the bare eye in the data area of an optical disc. This feature can be used to authenticate a legitimate...
US20100027402 OPTICAL HEAD DEVICE AND OPTICAL DISC APPARATUS  
An optical head device includes: a diffraction unit including a plurality of diffraction portions each diffracting a incident light in a given direction, the light beam being reflected by an...
US20050002311 Hologram recording medium and method of hologram recording and reproduction  
A hologram recording medium has a transparent substrate having an incidence surface, on which a write beam and a reference beam are made incident, and a servo surface opposite to the incidence...
US20090052302 Recording Apparatus and Recording Medium, and Computer Program  
A recording apparatus includes: a recording device for recording data onto each of a plurality of types of recording media by irradiating a light beam corresponding to each of the types of...
US20050002310 Holographic data storage apparatus and servo control method thereof  
Disclosed is a servo control method in a disk type holographic data storage apparatus such as a CD-ROM or a DVD-ROM, which has free insertion and extraction characteristics, and the holographic...
US20130016597 OPTICAL PICKUP APPARATUS  
An optical pickup apparatus is provided. Segmented regions included in a focus diffraction region includes focus segmented regions corresponding in number with different light emitted by a light...
US20080267041 OPTICAL SIGNAL RECORDING MEDIUM AND INFORMATION RECORDING/REPRODUCING APPARATUS  
An optical signal recording medium includes at least one signal recoding plane in which an optical signal is to be recorded, and a control information region which is a portion other than the...
US20090059764 OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING FILM FOR OPTICAL INFORMATION RECORDING MEDIUM  
Disclosed herein is an optical information recording medium and a recording film for the optical information recording medium, which are capable of readout of short recording marks at a higher C/N...
US20090086608 INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING SAME  
An information recording medium of the present invention includes N information layers on a substrate (1), where N is an integer of 2 or more. Information is recorded/reproduced by irradiating...
US20080165656 Method of Manufacturing of a Diffraction Grating-Based Optical Identification Element  
A system for writing an optical code within or on a fiber substrate is provided. The system includes a holding device that has a plurality of supports spaced apart from each other. The fiber...
US20100008207 Method and Apparatus for Optical Power Transfer Control  
A method and apparatus involve: supporting an optical part for movement in relation to a first path of travel of radiation; moving the part successively to first and second positions in which...
US20080247295 FIRST-SIDE DUAL-LAYER OPTICAL DATA STORAGE DISK AND METHOD OF MANUFACTURING THE SAME  
An optical data storage disk includes a central substrate and on each side of the substrate a pair of metal/alloy recording layers separated by a transparent layer.
US20120106310 OPTICAL HEAD DEVICE AND OPTICAL DISC DEVICE  
An optical head device mounted in an optical disc device. The optical head device is provided with a diffractive optical element and a photodetector. The diffractive optical element has: a primary...
US20120250486 METHOD AND APPARATUS FOR READING FROM AND/OR WRITING TO AN OPTICAL RECORDING MEDIUM  
A method and an apparatus for reading data from or writing data to an optical recording medium is described, the data being stored as marks having different lengths. Marks having a length below...
US20110261671 REPRODUCTION APPARATUS AND REPRODUCTION METHOD  
In case of reproducing a hologram recorded on an optical information recording medium, adjusting beam with the amplitude distribution and phase distribution at least partially the same as those of...
US20110164487 INFORMATION RECORDING/REPRODUCING DEVICE AND INFORMATION RECORDING/ REPRODUCING METHOD  
A writing condition adjusting apparatus according to the present invention adjusts a writing condition using first and second recording patterns. The first recording pattern is used to adjust a...
US20100165816 SYSTEM AND METHOD FOR TRACKING IN SINGLE-BIT HOLOGRAPHIC DATA STORAGE  
A system and method for controlling tracking in a holographic data storage system, including: impinging a beam on a holographic data disc, wherein the beam is reflected from a micro-hologram...
US20100149936 OPTICAL HEAD APPARATUS AND OPTICAL DISC APPARATUS  
In an optical head apparatus and an optical disc apparatus which can reduce influence of interlayer stray light on a differential push-pull signal without making the configuration complicated,...
US20100135143 OPTICAL SYSTEM, OPTICAL PICKUP APPARATUS, AND OPTICAL DISC APPARATUS FOR EXTRACTING SIGNAL BEAMS  
An optical system for efficiently extracting plural signal beams from a bundle of rays reflected from a multilayer optical disc.
US20100118683 Devices And Methods For A Micro-Fresnel Zone Plate Optical Device  
An embodiment generally relates to an optical device suitable for use with an optical medium for the storage and retrieval of data. The optical device includes an illumination means for providing...
US20130336100 OPTICAL INFORMATION RECORDING MEDIUM, AND SUBSTRATE AND MANUFACTURING METHOD FOR THE OPTICAL INFORMATION RECORDING MEDIUM  
In an optical disk including at least a rewritable phase change material and comprising a recording layer having a reflectivity of more than 15%, an address output value as an address pit signal...
US20130135980 SIX-DIMENSIONAL OPTICAL STORAGE METHOD AND APPARATUS  
The invention relates to a method of optical six-dimensional data storage and the apparatus based on it. This invention uses multiple beams with different wavelengths, encoded intensities and...
US20110051574 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...

Matches 1 - 30 out of 30