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8149676 |
Apparatus and method for recording/reproducing holographic data and holographic data storage medium
A method and apparatus for recording and/or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and/or reproducing holographic information...
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8144379 |
Recording and reproducing device and polarization direction controlling method
Disclosed herein is a recording and reproducing device including: a light source; an intensity modulating section; a polarization beam splitter; a selective polarization direction controlling...
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RE43106 |
Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the...
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8098562 |
Objective lens comprising a diffraction structure for distributing light in to light of different diffraction orders, optical pickup device, and optical information recording or reproduction apparatus having same
An objective lens includes a diffraction structure for distributing much of a quantity of an incident light beam into two diffracted lights having different diffraction orders from each other,...
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8094540 |
Optical pickup and optical device
An optical pickup includes a first laser beam light source 1 for emitting a light flux of a first wavelength, a diffraction grating 5 and an optical device 6 having a second laser beam light source...
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8089849 |
Hologram optical device, and compatible optical pickup having the hologram optical device and optical information storage medium system employing the compatible optical pickup
A hologram optical device, and a compatible optical pickup having the hologram optical device and an information storage medium system employing the hologram optical device. The hologram optical...
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8077563 |
Beam applying method, optical recording medium, and recording and reproducing apparatus
In a beam applying method, recording and reproducing operations are performed on an optical recording medium, in which a signal is recorded and reproduced by applying a beam thereto and which has a...
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8072867 |
Optical pickup
An optical-pickup hologram element has six regions on an x-y plane, divided as follows: the first region with a first line (an x-axis) and a second line that connects points (−xa, 0) and (−xb, yb)...
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8023386 |
Optical pickup apparatus and optical disk drive apparatus
An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective...
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8000184 |
Optical pickup device and optical disc device with offset compensation
When first-order diffracted beams leak into a region, which is for receiving only a zeroth-order diffracted beam from an optical disc, due to positional displacement between an objective lens and a...
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7995443 |
Apparatus and method to store information in a holographic data storage medium
A method to store information in a holographic data storage medium, wherein the method supplies a holographic data storage medium comprising an encoded focusing hologram and one or more encoded...
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7952977 |
Optical pickup apparatus
A diffracting portion is disposed in an optical path between a light source and an optical disc. The diffracting portion diffracts the reflected light from recording layers of the optical disc...
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7948855 |
Optical pickup
A multiple wavelength-adaptive optical pickup according to the present invention enables to obtain stable signals by suppressing displacement of optical intensity distribution at a light receiving...
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7934226 |
Optical pickup apparatus
An optical pickup apparatus comprising: a photo detector configured to receive light reflected from a medium; a housing mounted with the photo detector; and a projecting portion projecting from the...
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7920310 |
Complex objective lens for an optical head and optical information apparatus
A complex objective lens composed of a hologram and an objective lens, capable of realizing stable and high-precision compatible reproducing/recording of a BD with a base thickness of about 0.1 mm...
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7911921 |
Diffraction optical element, molding die for the optical element and manufacturing method thereof
A diffraction optical element is provided to reduce harmful lights and also suppress deterioration in the optical characteristics of the element. The diffraction optical element 22 is formed with a...
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7903530 |
Optical system for spatially controlling light polarization and method for manufacturing the same
An optical system for spatially controlling light polarization, and method for manufacturing the same, includes a light source for generating a light beam of a designated wavelength, a beam shaper...
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7848204 |
Holographic storage and regeneration system having servo mechanism
A holographic storage and regeneration system includes a holographic recording medium, a light source, a spatial light modulator, and a conjugate servo light guidance portion. The light source...
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7839733 |
Optical device and optical disc apparatus utilizing the optical device
A signal, which is derived from the relationship between the lens shift amount of an objective lens and the amount of the positional-deviation, of a received light beam with respect to a...
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7835251 |
Optical device and optical pickup device
An optical device diffracts incident light with a hologram element and receives the diffracted light with light receiving faces 20A to 29 on a light receiving element. Reflected sub-beams used for...
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7830773 |
Optical pickup for recording and reproducing information with a plurality of types of optical information recording mediums
An optical pickup device in which a hologram element has a plurality of different diffraction directions. In the tracking standard state, the hologram element is divided into six areas by a...
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7821902 |
Aberration detection device and optical pickup device provided with same
An aberration detection device of the present invention is such that an absolute value of detection sensitivity of an aberration error signal is increased, and variation in detection sensitivity of...
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7817509 |
Optical pickup apparatus and beam splitter
There is provided an optical pickup apparatus and a beam splitter which are capable of suppressing an adverse effect resulting from light reflected by a non-light-condensed layer that is different...
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7796487 |
Optical system for data storage devices
An apparatus includes a moveable arm for positioning an optical transducer adjacent to a storage medium, a light source, and an elliptical or ellipsoid shaped mirror mounted for reflecting light...
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7792005 |
Optical pickup apparatus
On an optical path between a light source and an objective lens, there is provided an optical path changing section for changing a predetermined optical path of undesired light passing through,...
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7787346 |
Hologram recording method and device, hologram reproduction method and device, and optical recording medium
There is provided a hologram recording method, including generating a signal light which is spatially modulated such that digital data is represented by an image of intensity distribution,...
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7782737 |
Optical integrated unit and optical pickup apparatus including the same
An optical integrated unit of the present invention includes: a semiconductor laser that is a light source; at least one light receiving element; a light dividing section which divides outgoing...
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7768881 |
Medium, apparatus, and method of recording optical-information
An optical-information recording medium includes a substrate that includes a servo surface having a servo pattern thereon; an information recording layer laminated on the servo surface of the...
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7719949 |
Optical head
An optical head includes a blue color laser beam sources, a red color laser beam sources, a dichroic prism, a collimator lens, a beam splitter, an objective lens, a photo detector element, a...
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7697396 |
Optical integrated unit and optical pickup device including same
An optical integrated unit includes a semiconductor laser (11), a polarized light beam splitter (14), a light receiving element (12), and a polarized light diffraction element (15) for diffracting...
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7684306 |
Optical pickup apparatus
There is provided an optical pickup apparatus that can obtain a stable servo signal by reducing stray light generated by diffraction in a recording layer other than a recording layer on which light...
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7613097 |
Optical pickup apparatus with bilaterally divided light beams
An optical pickup apparatus which carries out recording/reproduction or deletion of information on an optical disc, including a semiconductor laser device in which at least two light sources are...
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7606135 |
Optical recording/reproducing apparatus capable of recording/reproducing information onto/from various types of optical recording media of different recording densities and different thicknesses
An optical recording/reproducing apparatus including a plurality of light sources emitting lights with different wavelengths for use in recording/reproducing information onto/from various types of...
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7586826 |
Compatible optical pickup
An optical pickup which is compatible with at least one high density recording medium that uses a blue-violet beam and at least one lower density recording medium, the optical pickup including: an...
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7564765 |
Optical pickup device and optical disk apparatus
An optical pickup device includes: a light source; a light receiving sensor, having main tracking light detection faces and sub-tracking light detection faces; and a hologram, having tracking areas...
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7545729 |
Medium, apparatus, and method of recording optical-information
An optical-information recording medium includes a substrate that includes a servo surface; an information recording layer laminated on the servo surface of the substrate capable of recording...
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7542383 |
Optical disc assemblies for performing assays
This invention relates to an optical disc assembly capable of receiving an insert upon which an analyte of interest may be disposed. The optical disc assembly can be read by an optical disc reader,...
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7502298 |
Optical pickup apparatus for optical data media of different formats and method thereof
An optical pickup apparatus for reading and writing information from and to optical data media in different formats and a method thereof are provided. The optical pickup apparatus comprises a twin...
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7486606 |
Optical head and optical information apparatus for recording or reproducing information on an information recording medium
An optical head which is capable of realizing a stable tracking control, even if the rotational center of an information recording medium is not located on the extension line of the transfer...
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7463569 |
Optical disk apparatus with a wavelength plate having a two-dimensional array of birefringent regions
It is intended to provide an optical disk apparatus which detects a light amount greater than zero even when used in conjunction with an optical disk substrate having a large birefringence, so that...
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7450486 |
Optical pickup and optical information processing apparatus
An optical pickup performing recording, reproduction and deletion of information on or from an optical recording medium. The pickup includes light sources for information recording media using a...
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7443778 |
Optical head device and optical information device using the same, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server
It is an object of the present invention to record to and reproduce different types of optical disks using light beams with different wavelengths. In an optical head device for recording to and...
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7443779 |
Objective optical system for optical recording media and optical pickup device using it
An objective optical system includes a diffractive optical element on the light source side of an objective lens for focusing incident light of three different wavelengths with two different...
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7403458 |
Compatible optical pickup and light output amount detecting method performed in the compatible optical pickup
A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or...
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7394746 |
Optical head apparatus and optical information processing apparatus
To reduce the optical path length of the entire optical system in a reproduction or recording optical system of an optical recording medium, and promote miniaturization and reductions in costs of...
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7372602 |
Method for recording and reproducing holographic data and an apparatus therefor
A holographic recording and reproducing method for recording data in a holographic recording medium comprising a recording layer in which data are to be recorded as phase information of light by...
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7369467 |
Optical pickup including polarization holographic optical element and photodetector
Disclosed is an optical pickup including a polarization holographic optical element (HOE) and a photodetector. The optical pickup includes a light source, an optical path changer, an objective...
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7362689 |
Optical pickup and optical recording and/or reproducing apparatus adopting the same
An optical pickup which, when a first light reflected by a recording medium is divided into a central light area and first and second peripheral light areas at both sides of the central light area,...
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7359295 |
Optical pickup apparatus and optical disk drive apparatus
An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective...
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7355954 |
Laser module, optical pickup device, optical disk device, focus error detection method and tracking error detection method
It is an object to provide a laser module in which the position and the posture of a laser beam source can be adjusted even in a small space so that an optical intensity necessary for recording and...
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