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8830810 Holographic optical pickup device, optical information recording and reproducing device, and method of recording and reproducing optical information  
A holographic optical pickup device includes an image sensor that detects a diffracted beam generated from the region to be reproduced when irradiating an optical information recording medium with...
8767518 Objective lens element and optical pickup device  
An objective lens element that can suppress occurrence of an aberration is disclosed. Sawtooth-like diffraction structures having different height and cycles (pitches) are provided on an inner part...
8755259 Optical element  
An optical element has at least one surface divided into a plurality of regions and includes: a first region configured to converge light with a wavelength λ1 onto a storage surface of a first ...
8750083 Optical pickup apparatus and disc apparatus including the same  
An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to...
8737184 Holographic optical pickup device, optical information recording and reproducing device, and method of recording and reproducing optical information  
An optical pickup device includes a galvanometer mirror that changes an incident angle of a reference beam to an optical information recording medium, an image sensor that detects a diffracted beam...
8699312 Optical information recording/reproducing apparatus and objective optical system for the same  
An objective optical system for information recording/reproducing, at least one of optical surfaces of the objective optical system comprising a diffraction surface including a first region...
8619534 Apparatus for reading from and/or writing to a near-field optical recording medium  
An apparatus for reading from or writing to a near-field optical recording medium capable of detecting tilt and spherical aberration is described. The apparatus comprises a light source for...
8619522 Optical pickup and optical read/write apparatus  
In one embodiment, an optical pickup includes an optical system which forms multiple light beams based on the light emitted from a light source and which converges a write beam and a read beam,...
8611199 Objective lens element and optical pickup device  
An optical pickup device is provided which is compatible with at least two types of optical disc standards having different NAs and which controls an effective NA when a light beam for an optical...
8605559 Optical pickup device and optical disc apparatus  
In a small-sized optical pickup device for enabling to obtain a stable servo-signal, as well as, a focus error signal and a tracking error signal, without receiving ill influences of stray lights...
8599672 Objective lens, optical pickup device, and optical disc device  
Provided is an objective lens including a diffraction portion provided on a laser beam incident plane or output plane. The diffraction portion includes first second, and third diffraction regions,...
8582413 Optical pickup and optical disk apparatus  
According to one embodiment, an optical pickup configured to record and to reproduce on a layer of a disk, including, a light source configured to emit a laser beam, an objective lens including a...
8576684 Compatible optical pickup and optical information storage medium apparatus using the same  
An optical pickup and an information storage medium system using the same. The optical pickup includes a light source that emits light having a plurality of different wavelengths. The optical...
8565058 Liquid crystal alignment film, process for its production, optical element using the liquid crystal alignment film, and optical information writing/reading device  
To provide a liquid crystal alignment film having a sufficient alignment-regulating power and high resistance against blue laser beam and having, at the same time, excellent adhesion, and an...
8547815 Optical pickup device and optical disc apparatus  
Optical pickup device including: semiconductor laser diode emitting optical flux; objective lens converging flux emitted from the diode and radiating flux to an optical disc; diffraction grating...
8537650 Optical read/write apparatus  
An optical read/write apparatus as an embodiment of the present invention includes: a light-splitting element configured to split a light beam emitted from a light source into multiple light beams...
8531930 Optical pickup device and optical disc apparatus  
For obtaining stable servo-signals without receiving ill influences of stray lights from other layers, on both a focus error signal and a tracking error signal, when recording/reproducing a...
8520486 Optical pickup device and optical disc apparatus  
In an optical pickup device for a simple optical system, a light beam emitted from a laser diode is split into first and second light beams by a polarized beam splitter, an optical disc is...
8514686 Optical information recording/reproducing apparatus and objective optical system for the same  
An objective optical system for information recording/reproducing, at least one of optical surfaces of the objective optical system comprising a diffraction surface including a first region...
8509040 Optical pickup device and optical disc apparatus  
An optical pickup device includes a polarization diffraction grating to diverge an optical beam reflected from an optical disc and an optical detector to receive the optical beam diverged by the...
8498189 Optical pickup device  
In an optical pickup device for both CD and DVD disk media using a two-wavelength laser diode (1), a diffraction grating (11) is commonly used for both laser beams (L1, L2) for CD and DVD to...
RE44397 Single objective lens for use with CD or DVD optical disk  
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...
8488422 Elastic member, mounting structure of optical element, and pickup apparatus having the same  
A mounting structure of an optical element, includes: an optical element; an elastic member usable when the optical element is mounted; and a holding unit configured to be mounted with the optical...
8477583 Optical pickup and optical disc device including the same  
In an embodiment, an optical pickup includes at least one light source for selectively emitting three light beams having blue, red, and infrared wavelengths, respectively, and an objective lens...
8472299 Optical element and optical pickup device using the same  
An optical element which has optical steps each providing a phase difference to transmitted light and has low light amount loss and a high efficiency is provided. The optical element includes a...
8456978 Objective lens, optical head apparatus, optical information apparatus and information processing apparatus  
The present invention provides an objective lens, an optical head apparatus, an optical information apparatus, and an information processing apparatus that improve focal position detection...
8451703 Optical pickup and optical information recording and reproducing apparatus  
An optical pickup includes a light source, an optical system for irradiating a recording medium including a plurality of recording layers with light from the light source, a diffraction optical...
8451704 Reflection type wavelength plate and optical head device  
A phase difference layer 12 and a reflection layer 13 are provided. Then, adjustment is performed such that the phase difference layer 12 and the reflection layer 13 impart a predetermined phase...
8446809 Optical pickup device and optical disc device  
An optical pickup device imparts different astigmatisms from each other to light fluxes in four light flux areas A through D formed around an optical axis of laser light, out of the laser light...
8437237 Light source unit including a photodetector, and thermally-assisted magnetic recording head  
A light source unit includes a light source and a photodetector. The light source has an emission part for emitting light. The photodetector has a light receiving surface for receiving the light...
8437238 Diffraction grating, aberration correction element and optical head device  
There is provided a diffraction grating including a convex portion and a concave portion which are used for lights having different wavelengths λ1, λ2 and λ3 and are alternately disposed on at le...
8432783 Optical pickup device and position adjusting method for light separating element  
An astigmatism element converges laser light in a first direction for generating a first focal line, and converges the laser light in a second direction perpendicular to the first direction for...
8432781 Method and apparatus for reading from a near-field optical recording medium, and near-field lens for the apparatus  
A method and an apparatus for reading from a near-field optical recording medium are described. The apparatus includes: an optical system for generating a signal beam and a reference beam;a...
8427911 Optical pickup  
An optical pickup includes a light source, an objective lens, a diffraction grating that divides an optical beam reflected from a predetermined information layer, into a plurality of optical beams,...
8427922 Optical pickup device and optical disc device  
An optical pickup device is so configured as to change the propagating directions of light fluxes in four light flux areas defined in the periphery of an optical axis of laser light, out of the...
8411548 Optical pickup and optical disc apparatus  
An optical pickup includes a light source emitting a light beam, a diffraction element diffracting the light beam to separate it into a main beam and a sub beam, an objective lens focusing the main...
8406102 Optical pickup and optical read/write apparatus  
An optical pickup includes: a light source; a first diffractive element which diffracts light polarized in a particular direction; an objective lens; a lens actuator which shifts the objective lens...
8406109 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...
8385180 Optical pickup apparatus  
An optical pickup apparatus comprising: a laser diode; an objective lens made of a synthetic resin configured to focus laser light emitted from the laser diode to a signal recording layer of an...
8345528 Optical pickup device  
An optical pickup device includes an objective lens portion which converges laser light at a first focal point and a second focal point; an actuator which positions the first focal point or the...
8339922 Optical pickup apparatus  
An optical pickup apparatus comprising: a diffraction grating configured to diffract laser light from a laser diode so that signals recorded in first and second optical discs are selectively...
8325582 Complex objective lens, optical head, optical information apparatus, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server  
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...
8320226 Optical element having three or more sub-wavelength convexo-concave structures  
A disclosed optical element includes three or more sub-wavelength convexo-concave structures having pitches less than a wavelength of an incident light incident to the optical element and having...
8310910 Optical pickup device  
An optical system of an optical pickup device includes an astigmatism element which imparts astigmatism to BD light reflected on BD and CD light reflected on CD, and a spectral element which...
8300512 Liquid crystal element, optical head device, and variable optical modulation element  
A liquid crystal element includes: a transparent substrate; and a liquid crystal layer including: a liquid crystal material; and a concavo-convex portion including periodic concaves and convexes,...
8289831 Optical head, optical element with diffraction grating, optical disc device and information processing device  
An optical head includes a blue-violet laser light source for emitting a blue-violet laser beam, a mirror with a diffraction grating for transmitting and reflecting the blue-violet laser beam at a...
8279737 Diffraction grating, aberration correction element and optical head device  
There is provided a diffraction grating including a convex portion and a concave portion which are used for lights having different wavelengths λ1, λ2 and λ3 and are alternately disposed on at le...
8270280 Optical pickup device  
An optical pickup device is provided with a spectral element which imparts diffraction in such a manner that four light fluxes of the first laser light are separated from each other, when a light...
8270281 Optical pickup device and optical disc apparatus using same  
According to the present invention, of all beams of light reflected from the optical disc, only light in a peripheral region excluding a push-pull region is used to generate a DPD signal. In this...
8270279 Optical information recording/reproducing apparatus and objective lens for the same  
An objective lens for an optical information recording/reproducing apparatus, at least one of optical surfaces of the objective lens comprising a diffraction surface having a diffraction structure...
Matches 1 - 50 out of 260 1 2 3 4 5 6 >