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Match Document Document Title
7406007 Optical disc apparatus and spherical aberration correction controlling apparatus  
An optical disc apparatus is provided, which comprises a lens tilting section for tilting an objective lens to correct coma aberration occurring in a light beam spot focused on an information...
RE40329 Single objective lens for use with CD or DVD optical disks  
An optical disk reader or read/write system for CD or DVD formats. First and second laser diodes operating at different wavelengths have their output beams collimated and directed at a single...
7372784 Optical head apparatus  
The present invention proposes an optical head apparatus provided with light-blocking structure that can reliably prevent nonessential light from reaching the photo detector, without being an...
7342869 Optical-recording medium playback apparatus and optical-recording medium, including flying optical head features  
An optical-recording-medium playback apparatus includes a first optical member which focuses light emitted from a light-emitting unit on an optical recording medium, a second optical member which...
7301888 Recording apparatus  
In a recording apparatus for reproducing information recorded on a recording medium by utilizing near-field light, the recording apparatus realizes reliable information reproduction with a simple...
7274649 Holographic ROM system  
A holographic ROM system of the present invention includes a lens unit for filtering and collimating an output radiation diffracted from a holographic disk in order to produce an output data beam....
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...
7260047 Optical pickup that uses light sources with different wavelengths for each of multiple recording mediums  
An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light...
7193953 Holographic recording and reconstructing apparatus and mask for use therein  
In a holographic recording apparatus having a hologram medium for storing an interference pattern between a reference beam and a modulated signal beam, a double-layered mask for modulating a signal...
7180844 Holographic disc recording system  
A holographic disc recording system for recording, in the form of holograms, information stored on a source disc onto a target disc includes a conical beam shaper which transforms a reference beam...
7167433 Scanning apparatus for fluorescent multi-layer storage  
The invention relates to a scanning apparatus for scanning information in an information carrier ( 16 ) comprising a plurality of layers for storing data on a material capable of generating an...
7131128 Optical actuator  
An optical pickup actuator for use with a recording medium includes a swing arm pivoting in a tracking direction with respect to the recording medium, a first driving unit pivoting the swing arm,...
7088659 Optical disk apparatus and tilt detection method  
An optical disk apparatus includes a laser diode, and a light from the laser diode becomes a parallel light by a collimator lens, which is reflected toward an object lens by a reflection mirror....
7085220 Optical head and optical device for enhancing the intensity of a transmitted light  
A optical device including conductive films having a first and second surfaces, one hole, surface specific shapes periodically, and a layer inserted as an intermediate layer between the first and...
7054256 High capacity digital data storage by transmission of radiant energy through arrays of small diameter holes  
A storage media for storage of data thereon is provided. The storage media including: a first layer, the first layer being substantially transparent to a predetermined radiant energy used for...
7046613 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...
7046612 Drive current supply circuit with current mirror  
A drive current supply circuit is provided in which the speed of rise of the drive current to a laser diode is increased. In a drive current supply circuit for supplying drive current I to load 50...
7038978 Optical information recording and reproducing apparatus for recording information bits into an optical disk in a three dimensional arrangement  
The optical information recording and reproducing apparatus includes a light source for emitting a light beam, an objective lens for converging the light beam emitted from the light source to an...
7035194 Optical pickup apparatus for reading and recording information on recording media  
An optical pickup apparatus for reading and recording information on recording media includes a semiconductor laser, a collimating lens, a half mirror, a reflecting mirror, and an objective lens....
6993826 Method of manufacturing a probe array  
An optical-pickup slider is characterized in that a light-transmitting-property substrate is bonded to a surface of a layer having a tapered through hole, on which surface a larger opening of the...
6961291 System for enhanced astigmatic focus signal detection  
An auto-focus system for a DVD reader or other optical access unit which reads and/or writes information from/to at least two information layers on an optical storage medium such as a DVD or DVR....
6940798 Optical-disk reproducing apparatus, optical pickup apparatus and optical-disk recording and reproducing apparatus  
The present invention is capable of selectively reproducing an information signal from an optical disk with any of a plurality of types having different track pitches of recording tracks, that is,...
6934240 Optical element, optical head and signal reproducing method  
An optical element is provided in which in a lens surface substantially perpendicular to the optical axis of the lens, there is embedded a conductive member whose diameter or width is smaller than...
6920091 Optical reproduction apparatus and optical recording and reproduction apparatus  
There is provided an optical reproduction apparatus and an optical recording and reproduction apparatus which can improve a CNR and can read at high speed. The center portion of a laser light...
6914873 Recording apparatus  
In a recording apparatus for reproducing information recorded on a recording medium by utilizing near-field light, the recording apparatus realizes reliable information reproduction with a simple...
6901036 Method and apparatus for reproducing an optical signal  
An apparatus for reproducing information stored in an optical recording medium which comprises marks or pits which are arranged at a pitch less than λ/2NA, wherein λ is a wavelength of light used...
6888787 Optical information processor and optical element  
An optical disk device has an aperture of an objective lens in an incoming path of a beam from a semiconductor laser to an optical disk formed larger than an aperture in a return path from the...
6885616 Optical pickup apparatus and information recording and/or reproducing apparatus  
A phase device for providing a phase difference between an inner radius portion and an outer radius portion of a light beam which is emitted from a light source is provided in an optical path...
6876620 Optical storage device  
An optical storage device capable of at least reproducing information recorded on first and second optical storage media different in distance from a medium surface on which a light beam is...
6754145 Tilt compensation device for disk drive  
In a disk drive for compensating the tilt between a disk including a first identification information area shifted radially outward by a predetermined distance from the center of a track, and a...
6747938 Recording medium having substrate with thickness dependent on numerical aperture of object lens, method of forming the optical medium and optical recording/reproducing apparatus  
A high density optical disc that can be driven changeably with the existent optical disc by the same driving apparatus. On the recording surface of the optical disc, a light transmissive layer with...
6738338 Near-field optical head, method of fabricating same, and optical drive using same  
There is disclosed a near-field optical head having an microscopic aperture whose size can be varied. The optical head comprises a substrate of silicon. A hole in the form of an inverted cone is...
6728192 Tracking error signal detection system for optical recording medium  
In a magnetic recording medium to detect tracking error signals optically where an optical head and a magnetic head scan different tracks, two signals having phases different by π/2 are generated...
6721258 Optical device for super-resolution  
The present invention is directed to the provision of an optical device that can easily eliminate only side lobes or side lobe components from a super-resolution optical spot. The optical device...
6707779 Optical scanning device with a selective optical diaphragm  
An optical scanning device comprising means for scanning optical record carriers of predetermined different formats, such as CDs and DVDs, using scanning at different numerical apertures provided...
6700856 Optical head, magneto-optical head, disk apparatus and manufacturing method of optical head  
A laser beam emitted from a semiconductor laser enters an incident surface of a transparent condensing medium with a central part of the laser beam being shielded by a shading metal member, and a...
6687196 Method and apparatus for implementing high density recording on a recording medium and a method of manufacturing same  
An optical head which implements high recording density of a recording medium and which is miniaturized in size and improved in data transfer rate, a disk apparatus, and a method for manufacturing...
6657931 Optical disc drive for performing read/write operations on optical disks  
An optical disc drive compatible with optical discs of different types, for example, is provided. For focusing, through an optical system used in common with the different types of optical discs, a...
6643247 Method for recording information in optical information medium and reproducing information therefrom  
An optical head apparatus is provided with a first laser element, a second laser element and a polarized beam splitter. The first laser element emits a laser beam having a first wavelength. The...
6631227 Information recording and reproducing apparatus  
An information recording and reproducing apparatus for at least one of recording and reproducing information on a recording medium utilizing near-field light has a suspension arm and a near-field...
6618346 Optical pickup device having aperture restriction arrangement  
An optical pickup device has one or a plurality of aperture restriction devices that are disposed in the optical path of a light beam that is emitted from a light source and illuminated onto an...
6614742 Optical head, magneto-optical head, disk apparatus and manufacturing method of optical head  
The present invention relates to an optical head, a magneto-optical head, and a disk apparatus, that have high light efficiency, can realize high-density recording medium and perform high-speed...
6577584 Method and apparatus for detecting light from a multilayered object  
An apparatus and method for reproducing signals from a multi-layer structured recording object wherein a linearly polarized laser beam illuminate the multi-layer structured object, such as a phase...
6574183 Device for reading from or writing to optical recording media  
The present invention relates to a device for reading from or writing to optical recording media, which device has a scanning beam generation means, a focusing means and a photodetector comprising...
6563781 Optical information storage device and optical head  
It is an object of the present invention to provide an optical information storage device capable of performing stable information accessing at a high recording density, and an optical head, and...
6563779 Tracking error signal generation using confocally filtered detection  
A tracking error signal generation apparatus and method which utilizes confocal detection with a split detector and a differencing circuit for generation of tracking error signals. A first lens is...
6560189 Optical information storage apparatus  
There is disclosed a compact optical information storage apparatus in which noise attributed to wobbling or the like is reduced and high-density recording is possible. An optical device 410 ...
6556533 Optical pickup device  
In an optical pickup device for recording information onto and/or reading out information from an optical recording medium, comprising a light beam source for generating a light beam to be...
6504667 Magnetic disk unit and method of manufacture thereof  
A magnetic disk unit which can provide a sufficient PD output of laser beams for optical tracking. The magnetic disk unit comprises a diffraction grating for splitting laser beams from a laser...
6463023 Optical head and method for monitoring light source output in optical head  
An optical head includes a light source for generating a luminous flux, a polarization beam splitter, an object lens opposed to an appropriate recording medium, and a power monitoring device for...
Matches 1 - 50 out of 528 1 2 3 4 5 6 7 8 9 10 11 >