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7391700 Optical storage in discs having multiple data layers  
Optical pick-up apparatus for retrieving data stored on an optical storage disc having a plurality of record layers ( 6, 7 ), the radiation beam reflected back from the disc when a first layer ( 7...
7388822 Liquid crystal lens element and optical head device  
A liquid crystal lens element having a lens function is provided, which is small sized without having moving part, and which can stably carry out correction of spherical aberration containing a...
7385905 Apparatus for reading from and/or writing to optical recording media  
When an optical recording medium having a plurality of data layers is being read from and/or written to, the input beam experiences an aberration, inter alia in the top layers of the data layers....
7362688 Optical scanning device  
An optical scanning device for scanning first and second type of record carriers includes a radiation-generating device for generating a radiation beam having first and second wavelengths in the...
7362687 Method and device for holographic recording  
A holographic recording method for recording information as phase information of light by projecting a signal beam and a reference beam onto a recording medium, wherein an X direction is defined as...
7358471 Optical head device  
An optical head device includes a light source which emits a light beam, an objective lens which condenses the light beam on the optical disk, a condensing lens which condenses reflected light from...
7355952 Liquid crystal device, its driving method, and driving apparatus  
A liquid crystal device, and a method and an apparatus for driving the same in which the refractive index of the liquid crystal device is adjusted using a simple driving method and apparatus, which...
7352664 Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method  
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
7345981 Optical pickup  
An optical pickup including an optical member which inhibits interference light reflected from an adjacent layer from being received by a photodetector when an optical information storage medium...
7324255 Spatial optical modulator  
A spatial light modulator, in which light modulation elements are arranged in a same plane. In the spatial light modulator, a plurality of the light modulation elements are arranged such that there...
7310297 Optical disk device  
This invention provides an optical disk device comprising an optical pick-up being structured to irradiate light beams onto an optical disk through an objective lens unit, receive the light beams...
7301869 Spherical aberration correcting method and apparatus  
In a spherical aberration correcting apparatus, a test recording unit is configured to perform a test recording on an optical disk. A characteristic obtaining unit is configured to obtain a...
7298686 Optical pickup and optical disk reproducing device  
An optical pickup in an optical disk reproducing device is operable to switch operations between a low-power operation mode and a high-power operation mode, and includes a liquid crystal element...
7283450 Optical disk device and information recording/reproducing method  
An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form...
7283439 Optical disk apparatus using mechanism for controlling spherical aberration  
In the past there has been a problem that on a detection surface the influence of interference causes a defocusing signal to degrade, narrowing the range in which spherical aberration can be stably...
7277619 Nano-imprinted photonic crystal waveguide  
This invention relates to a method for forming a nano-imprinted photonic crystal waveguide, comprising the steps of: preparing an optical film on a substrate; preparing a template having a...
7272099 Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinhole mechanism  
An exposure apparatus of an optical disk master having a laser source, a deflector for deflecting a recording laser beam obtained based on the laser beam of the laser source and an objective lens...
7262820 Liquid crystal panel, optical pickup, and information reproducing apparatus  
The transparent electrode of the liquid crystal panel includes the first partial electrode portion constituted by the pattern electrodes and the second electron portion constituted by the pattern...
7257070 Optical disc recording and/or reproducing apparatus and aberration adjustment method  
The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double...
7254107 Optical head and optical recording and reproducing apparatus  
An optical head is provided with: an objective-lens-use opening that determines an aperture of the objective lens; a light-source light-quantity controlling opening that aperture-controls light...
7251203 Optical disc drive apparatus, information reproducing or recording method  
Disclosed here is a method for solving a conventional problem that no spherical aberration signal can be detected from any push-pull signal that is easy to adjust an object photodetector when a...
7248543 Tilt servo system for correcting tilt angle of light beam in information read/write apparatus  
A highly accurate and stable tilt servo system is provided. A liquid crystal device for phase correction is driven based on drive data stored in a lookup memory to thereby make a tilt correction....
7242510 Aberration correction element, optical pickup, and information equipment  
An aberration correction element is intended to correct an aberration. The aberration correction element is placed in a middle of an optical path between a light source and an optical element for...
7236444 Wavefront aberration correcting device and optical pickup equipped with the same  
An object of the present invention is to provide a wavefront aberration correcting device comprising a liquid crystal device that maximizes transmittance and minimizes light transmittance...
7236434 Exposure apparatus of an optical disk master, method of exposing an optical disk master, and wavefront fluctuation correction mechanism  
Apparatus and method for exposing an optical disk master having a laser source, a deflector for deflecting a recording laser beam based on the laser beam of the laser source and an objective lens...
7209426 Liquid crystal optical element and optical device  
The invention is directed to the provision of a liquid crystal optical element, for correcting wavefront aberrations (principally, coma aberration and spherical aberration), that can be mounted...
7209415 Optical pickup device and recording and/or reproducing device  
Provided are an optical pickup device, which is capable of detecting and correcting spherical aberration while suppressing an increase in the number of construction elements and without increasing...
7202919 Holographic data storage with PDLC spatial light modulator generating reference and object beams  
The invention is directed to a holographic data storage system including a spatial light modulator device (SLM) that comprises optical elements in the form of polymer dispersed liquid crystal...
7196989 Optical recording medium driving device  
A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light...
7177259 Optical head and optical recording medium drive device  
The present invention is directed to an optical head adapted for performing recording or reproduction of information signals with respect to an optical disc ( 102 ), which controls light coupling...
7173898 Optical recording medium driving device  
A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light...
7170846 Light receiving and emitting unit and optical pickup using the same  
A light receiving and emitting unit has a plurality of light sources, a light receiving element, a light control unit, and an optical block. The optical block has at least a first and a second...
7170845 Aberration correcting apparatus  
An aberration correcting element includes a first aberration correction element movable along the optical axis of the light beam for correcting the aberration of the light beam; a driver for...
7170832 Optical scanning device  
A optical scanning device ( 1 ) for scanning an information layer ( 2 ) with a radiation beam ( 25 ) in a writing mode and a reading mode comprises a radiation source ( 7 ) for emitting the beam...
7170664 Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method  
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
7158450 Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method  
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
7154837 Optical pickup and optical information recording/reproducing device  
An optical pickup and an optical information recording/reproducing device are provided, each of which is capable of forming a super-resolution spot to conduct micro-mark recording, and does not...
7151724 Disk recording apparatus and disk recording method  
A disk recording apparatus for recording data to a disk includes: a reading and writing element for emitting a read beam onto the disk to read out recorded data therefrom while emitting a plurality...
7139234 Optical pickup  
An optical pickup is provided for recording and reproduction of information onto and from an optical disk. In the optical disk, in a forward optical path, a single polarized optical beam is...
7126901 Device and unit for correcting aberration of light beam  
An aberration correcting unit is provided for correcting an aberration of a light beam radiated onto an object to be detected and then reflected from the object. This unit comprises an aberration...
7120106 Optical disc recording and/or reproducing apparatus and aberration adjustment method  
The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double...
7110343 Spherical aberration correction apparatus  
An aberration correction apparatus includes a first aberration correction element having aberration correction portions, a second aberration correction element which causes the wave front of the...
7095701 Optical disc recording and/or reproducing apparatus and aberration adjustment method  
The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double...
7079470 Diffraction device for reading and/or writing a record carrier  
A device for reading and/or writing a record carrier ( 13 ), the device comprising converging means ( 35, 45, 47, 106, 108 ) for focusing a radiation beam ( 27, 101 ) originating from a radiation...
7075878 Optical disk device and information recording/reproducing method  
An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form...
7068583 Nano-scale resolution optical pickup for reading/writing ultra-high density data on CD and DVD data storage elements  
A single high resolution holographic pickup, for reading/writing both a CD and DVD optical recording medium, has an electrical tuning control for applying a DC and AC signal to a tunable Bragg...
7068576 Optical disc recording and/or reproducing apparatus and aberration adjustment method  
The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double...
7068572 Optical head and optical disk apparatus  
To stably carry out recording and reproducing to and from a high density optical disk without using a double servo in the optical disk using a high NA objective lens. A detection of a spherical...
7054253 Optical head  
An optical head device including a phase correcting element having an anisotropic optical medium sandwiched between a pair of substrates. The paired substrates have surfaces provided with...
7034980 Optical element, optical head, optical recording reproducing apparatus and optical recording/ reproducing method  
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
Matches 1 - 50 out of 224 1 2 3 4 5 >