Matches 1 - 45 out of 45


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US20070237053 Aberration correcting unit, optical pickup device, information reproducing apparatus, and aberration correcting program  
A control portion of aberration correcting unit includes: a potential calculating block that determines a potential to be applied to each of the divided electrodes of the first transparent...
US20060092814 Aberration compensation element, and optical system and optical device provided with the same  
The optical system of the present invention comprises a three-wavelength hologram module in which a three-wavelength light emitter/photodetector and a hologram are integrated, a collimate lens, an...
US20090022035 SPHERICAL ABERRATION CORRECTION CONTROL  
A controller and a control method is provided to control a spherical aberration correcting device provided in an optical pick-up head to change a spherical aberration compensate value according to...
US20050058050 Optical pick-up having a spherical aberration compensator and a method of compensating for spherical aberration  
An optical pick-up apparatus and method incorporating a spherical aberration compensator is disclosed. The optical pick-up employs the spherical aberration device that comprises a wave plate for...
US20110149711 COMA ABERRATION COMPENSATING DEVICE, COMA ABERRATION COMPENSATING METHOD, AND OPTICAL DISC  
A method for compensating the coma aberration in a pickup of a recording and reproducing device that records or reproduces data on or from an optical disc using the pickup is provided. The method...
US20070237054 Aberration correcting device, program thereof and disc apparatus equipped with the device  
In disc discrimination operation of aberration correcting device including: light sources corresponding to n types (n is natural number, ≧2) of discs; and liquid crystal element having plurality...
US20070147216 Optical pick-up, method of generating aberration for compensation and optical information processing apparatus using the same  
An optical pick-up to perform recording or reproducing for an optical recording medium is disclosed, which includes a light source configured to emit a light beam, an objective lens configured to...
US20080253262 Multi Layer Variable Refractive Index Unit  
A variable refractive index unit (140) includes an optical axis and a first layer (144a, 146a, 146a′ of controllably variable refractive index extending in a first predetermined configuration in a...
US20050276204 Objective lens drive unit in an optical head  
An objective lens drive unit in an optical head includes a lens holder mounting thereon an objective lens, a sheet coil unit including a focusing coil and a tracking coil, and a pair of liquid...
US20070195676 Optical system  
An optical system comprising an optical element arranged on an optical axis in the path of a radiation beam. The optical element (2; 116; 202) comprises a birefringent material and has a...
US20070268806 Optical Head and Optical Information Recorder/Reproducer  
Fifth order spherical aberration in addition to third order spherical aberration for an optical information recording medium of which thickness of a light transmission layer changes greatly is...
US20070237052 Aberration correcting device, optical pickup device, information reproducing apparatus, aberration correcting program, and aberration correcting method  
A drive controller for electrode group A obtains a disc type, a current layer, and a temperature of the liquid crystal element, and based on contents of the information, it obtains drive voltage...
US20050174918 Wavefront aberration compensation element, optical pickup, and optical disk apparatus  
A wavefront aberration compensation element includes a wavelength selection phase plate having a plurality of phase steps having various thicknesses at various areas, a liquid crystal layer for...
US20100061216 OPTICAL HEAD UNIT AND OPTCAL INFORMATION RECORDING/REPRODUCING APPARATUS  
An optical head unit includes, apart from an objective lens toward a light source, an optical device that changes the image height of light incident onto the objective lens, wherein the optical...
US20070195672 Writeable optical recording of multilevel oriented nano-structure discs  
A method of performing writable optical recording of a medium to form multilevel oriented nano-structures therein, comprises steps of providing a disc-shaped, writable recording medium having a...
US20070201334 Optical pickup control apparatus and method  
An optical pickup control apparatus including a pickup unit to apply an optical signal to an optical disc, to receive an optical signal from the optical disc, and to convert the optical signal...
US20100027385 ABERRATION CORRECTING DEVICE, OPTICAL HEAD, AND OPTICAL DISC APPARATUS  
An aberration correcting device includes: a first transparent electrode; a second transparent electrode; and a liquid crystal layer disposed between the first transparent electrode and the second...
US20050083813 Optical pickup apparatus and optical recording medium playback apparatus  
An optical pickup apparatus includes a light source that produces and emits light beams on an optical recording medium having a plurality of recording layers; a plurality of switchable objective...
US20130163399 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...
US20080151736 OPTICAL PICKUP  
The present invention aims to correct the spherical aberration and ensure the working distance and furthermore to obtain satisfactory recording and reproducing property by shaping the optical spot...
US20080291808 Optical pickup device  
An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a...
US20070183294 Objective lens driving unit and optical pickup device having the same  
The movable holder of the objective lens driving unit is provided with an opening hole. An objective lens retaining portion for retaining an objective lens is disposed at the upper portion of the...
US20090238061 OPTICAL PICKUP APPARATUS AND OPTICAL INFORMATION RECORDING REPRODUCING APPARATUS  
A structure according to the present invention is an optical pickup apparatus including a first light source, a second light source, a third light source, a first objective optical system, a...
US20080101201 Optical Pickup Device  
The object of the present invention is to eliminate a broadband wavelength plate and to reduce a burden imposed on a manufacture and design of an optical pickup device. According to the present...
US20050122879 Optical disk apparatus and optical disk  
An optical system has an objective lens condensing a light beam from the light source on a recording layer selected from the plurality of recording layers of the optical disk, and leading a...
US20090028034 TEMPERATURE CONTROL APPARATUS FOR OPTICAL CRYSTAL  
A temperature control apparatus for optical crystal can employ a general temperature control element as is, can be controlled by a single temperature sensor and is applicable to patterns that...
US20090016194 Optical Pickup Device  
An optical pickup device includes a first light source emitting first light with a first wavelength, a second light source emitting second light with a second wavelength, a third light source...
US20080106983 Optical pickup apparatus  
An optical pickup apparatus includes a plurality of laser light sources, a single objective lens, and a beam shaping mirror. The beam shaping mirror causes each of the laser beams to be incident...
US20080181084 OPTICAL PICKUP  
The liquid crystal element includes a pair of transparent substrates, a liquid crystal arranged between the substrates, a diffraction pattern including concentric diffraction electrodes formed on...
US20080144473 OPTICAL ELEMENT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS  
An optical element is for generating recording signal light and reference light interferes with the recording signal light by changing an orientation state of a liquid crystal to record optical...
US20070097810 OPTICAL HEAD UNIT AND OPTICAL DISC APPARATUS  
According to one embodiment, an optical head unit which is provided with a liquid crystal element to correct aberration on an information recording surface of an optical disc, to decrease the...
US20070177482 Optical pickup device and optical disc apparatus having the same  
Optical pickup device equipped with liquid crystal diffraction element is provided with liquid crystal diffraction element control portion, which includes detecting portions for detecting light...
US20100149950 LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE  
To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal...
US20050276205 Optical pickup apparatus and method  
An optical pickup apparatus and method for recording and/or reproducing information onto and/or from optical discs having diverse specifications. Particularly, a diffraction grating for use in the...
US20080231788 LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE  
To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal...
US20070121471 Information reproducing apparatus  
In an information reproducing apparatus in which a liquid crystal lens element is used for the selection and switching of layers, the instability of servo control during the switching of the...
US20070183293 LIQUID CRYSTAL LENS ELEMENT AND OPTICAL HEAD DEVICE  
A liquid crystal lens element capable of finely adjusting focal length according to the magnitude of applied voltage, and an optical head device employing such a liquid crystal lens element, are...
US20100260030 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,...
US20100103961 MODE-LOCKED LASER DEVICE, ULTRASHORT PULSE LIGHT SOURCE DEVICE, BROAD BANDWIDTH LIGHT SOURCE DEVICE, NON-LINEAR OPTICAL MICROSCOPY DEVICE, RECORDING DEVICE AND OPTICAL COHERENCE TOMOGRAPHY DEVICE  
There is provided a mode-locked laser device including: a resonator; a solid-state laser medium that is disposed in the resonator and outputs oscillation light in accordance with the incidence of...
US20090252011 OPTICAL INFORMATION RECORDING/ REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/ REPRODUCING METHOD  
An optical information recording/reproducing device includes a liquid optical element containing a liquid crystal polymer layer in an optical head. A liquid crystal optical element drive unit...
US20070171802 Optical disc apparatus and method for adjusting the same  
An adjusting method includes a preparing step for obtaining an applied voltage value and a phase difference in a liquid crystal element in the case where an optimal reproduced signal is obtained...
US20120075977 OPTICAL INFORMATION RECORDING/ REPRODUCING APPARATUS AND OPTICAL INFORMATION RECORDING AND REPRODUCING METHOD  
An optical information recording/reproducing device includes a liquid optical element containing a liquid crystal polymer layer in an optical head. A liquid crystal optical element drive unit...
US20120072931 SURFACE EMITTING SEMICONDUCTOR LASER, OPTICAL RECORDING HEAD, AND OPTICAL RECORDING APPARATUS  
Disclosed is an optical recording head which is provided with a surface emitting laser that emits laser light which is efficiently introduced into a waveguide through a grating coupler...
US20110235494 Optical Pickup Apparatus  
An optical pickup apparatus includes: a laser diode configured to generate a laser beam; and an objective lens having an annular diffraction zone formed on an incident surface thereof on which the...
US20110134742 PICKUP APPARATUS, OPTICAL RECORDING AND REPRODUCTION APPARATUS, AND RECORDING AND REPRODUCTION METHOD  
A pickup apparatus includes a light source; a light separator; an object lens that concentrates the light which penetrated the light separator on the optical recording medium; a movable lens; and...

Matches 1 - 45 out of 45