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US20050286355 |
Optical pickup, apparatus and method for assembling lens
An optical pickup and a lens assembling apparatus and a method thereof are provided. The optical pickup includes a plurality of objective lenses and a lens holder. The lens holder has a plurality... |
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US20060023577 |
Optical recording and reproduction method, optical pickup device, optical recording and reproduction device, optical recording medium and method of manufacture the same, as well as semiconductor laser device
An optical recording and reproduction method, optical pickup device, and optical recording and reproduction device are provided, in which an optical recording medium is irradiated with near-field... |
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US20050249097 |
Optical pickup apparatus
An optical pickup apparatus for recording/reproducing information onto/from a first and a second optical information recording media respectively having a first and second protective layers with a... |
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US20070268794 |
Beam splitter configuration
A beam splitter configuration includes at least one beam splitting system for splitting a light beam into a number of partial beams. The beam splitting system includes at least one first and at... |
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US20050201221 |
Object lens producing device and producing method
An objective lens unit manufacturing apparatus for manufacturing an objective lens unit, with a numerical aperture not less than 0.7, made up by a plurality of lenses, includes a positioning... |
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US20060193217 |
Optical pickup and optical information reproducing device
An optical pickup and an optical information recording and reproducing device in which spherical aberration correction control after a disc is loaded can be efficiently made in a short time.... |
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US20050207290 |
Aberration correcting optical unit, optical pickup apparatus, and information recording/reproducing apparatus
An aberration correcting optical unit includes an optical element for causing a phase change to light passing therethrough by the application of voltage and electrode layers for applying voltages... |
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US20050135207 |
Optical system for detecting data signal and tracking error signal
In an optical system, reflected light from the disk is diffracted by a hologram optical element, and received by an optical detector. A focusing error signal is detected from −1st-order diffracted... |
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US20070097809 |
METHOD OF ADJUSTING SPHERICAL ABERRATION AND FOCUS OFFSET IN OPTICAL DISK APPARATUS AND OPTICAL DISK APPARATUS USING THE SAME
Provided is a simple method of adjusting spherical aberration and a focus offset. According to the adjusting method of the present invention, focus offset adjustment and spherical aberration... |
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US20060114772 |
Laser processing device
A laser processing device having an effect similar to that obtained by changing a focal length of a condensing lens. A part of a laser beam entering into a flat surface portion of the condensing... |
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US20060039266 |
Objective lens, light converging optical system, optical pickup apparatus, and recording/reproducing apparatus
An objective lens for recording information on and/or reproducing information from an optical information recording medium, comprises a diffractive structure including ring-shaped diffractive... |
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US20050254360 |
Focus control method for optical disk device
The focus control method of the present invention includes: rotating an optical disk; driving an optical pickup upward and downward vertically to the optical disk at timing of a signal pulse... |
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US20070008836 |
Optical disk device
An optical disk drive having a laser source for irradiating an optical beam onto an optical disk, a lens unit to focus the optical beam from the laser source onto the optical disk, a drive unit... |
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US20080080335 |
Optical Recording Medium Utilizing Holography and Method for Manufacturing the Same and Optical Recording and Reproducing Apparatus
An optical recording medium has a transparent substrate having a first surface and a second surface, a recording layer provided on the first surface of the substrate and on which a light beam is... |
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US20060158971 |
Objective lens for optical disk recording/reproducing device comprising variable lens formed by the interface of two immiscible fluids
There is disclosed an objective lens (16),for use with optically readable disks of differing cover layer thicknesses, wich objective lens (16) comprises a variable lens (1) formed by the interface... |
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US20060018234 |
Optical pickup system, optical head, optical disk apparatus, antireflection coating, optical pickup components, and manufacturing method for antireflection coating
An optical pickup system for reading information of three kinds of optical recording media. The optical pickup system has a wavelength selective filter that includes an outer area for shielding... |
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US20100061203 |
METHOD AND APPARATUS FOR RECORDING AND/OR REPRODUCING DATA INTO AND/OR FROM OPTICAL DISK
Provided are a method and apparatus for recording and/or reproducing data into and/or from an optical disk. The apparatus includes a reference beam optical system to form a focus of a reference... |
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US20050276207 |
Objective lens, actuator, optical head, and optical recording/reproducing apparatus
The invention relates to an objective lens for converging light emitted by a light source to irradiate an optical recording medium with the convergent light, an actuator having the same, an... |
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US20050122857 |
Optical pickup
When recording/reading information data onto/from a recording medium by irradiating the recording medium with a first light beam, correction for decreasing the amount of spherical aberration is... |
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US20060092778 |
Method of detecting focus error signal of optical head and optical recording/reproducing apparatus utilizing the same
The invention relates to a method of detecting a focus error signal of an optical head to be used for controlling the focus position of an objective lens for converging a light beam on an optical... |
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US20060092816 |
Objective optical system and optical pick up apparatus
An objective optical system for use in an optical pick up apparatus in which recording and/or reproducing information is conducted for a first optical disc equipped with a protective layer having... |
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US20050002289 |
Optical pickup moving unit, optical disk apparatus, and method of manufacturing optical disk apparatus
An optical pickup moving unit holds an optical pickup head including a focusing optical system for converging a light beam emergent from a light source onto an optical recording medium and a... |
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US20080008057 |
OPTICAL DISC APPARATUS AND INFORMATION RECORDING/REPRODUCING METHOD OF THE SAME
An optical disc apparatus is designed to perform focus control of an objective lens of an optical pickup by generating a first focus error signal of an astigmatism method from a signal based on... |
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US20070189130 |
Optical information device and information recording and reproduction device
Stable tracking control is achieved for an optical recording medium having a plurality of information recording planes. To achieve this, an optical information device comprises a light source for... |
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US20050270958 |
Objective lens and optical pickup apparatus
The present invention includes relates to an objective lens used for reproducing and/or recording of information for at least two types of optical discs including high density discs, and has... |
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US20070121469 |
HOLOGRAPHIC OPTICAL PICKUP APPARATUS
Provided is a holographic optical pickup apparatus which can be reduced in thickness and production cost while having a beam shaping unit. To be specific, in a holographic optical pickup apparatus... |
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US20050259554 |
Objective optical system and optical pickup device using it
An objective optical system is formed of a diffractive optical element with a diffractive surface formed on a planar ‘virtual surface’ (i.e., a surface that would be planar but for the diffractive... |
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US20060077794 |
Objective optical system for optical recording media and optical pickup device using the objective optical system
An objective optical system for focusing light from a light source onto at least two different types of optical recording media having different substrate thicknesses in order to record or... |
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US20080019254 |
OPTICAL PICKUP DEVICE
A laser beam emitted from a light source is divided into a main beam and two sub-beams by a diffraction grating. A filter is arranged between a collimator lens and an objective lens. A filter unit... |
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US20050122856 |
Optical head device having deformable reflecting mirror
In a mirror unit, for the purpose of correcting spherical aberration, a reflecting mirror is changed in form by a piezoelectric film to adjust a degree of parallelism of a reflected light. To... |
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US20070171778 |
Optical recording/reproducing apparatus, optical pickup, and tracking error detecting method
An optical recording/reproducing apparatus includes an optical pickup and a control section. The optical pickup includes: a detecting section; an optical system that radiates light from a light... |
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US20080019232 |
OBJECT LENS AND OPTICAL PICK-UP DEVICE HAVING THE SAME
An object lens and an optical pick-up device having the same capable of recording and/or reproducing a plurality of types of optical discs, the optical pick-up device including: a light emitting... |
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US20070115767 |
Optical pickup device
A wavefront of a laser light is adjusted using a phase correcting element. The phase correcting element includes an electrode layer, an electrode layer arranged facing the former electrode layer,... |
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US20080002540 |
Holographic diffraction element and optical pickup device using holographic diffraction element
According to one embodiment, a holographic diffraction element is divided into a plurality of regions which diffract reflected light from an optical recording medium to a plurality of... |
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US20080008058 |
OPTICAL INFORMATION PROCESSING APPARATUS AND METHOD
An optical information processing apparatus and an optical information processing method are provided. The optical information processing method includes steps of: irradiating a reference beam on... |
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US20050083823 |
Emitted-light checking apparatus for optical pickup
An emitted-light checking apparatus receives laser beam which has been emitted from a laser diode of an optical pickup subject to check. The laser beam travels through a cylindrical lens provided... |
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US20090109809 |
LASER DRIVE DEVICE AND INFORMATION RECORDING/REPRODUCING APPARATUS USING THE DEVICE
According to one embodiment, a laser drive circuit includes a photodetector which receives part of laser light emitted from a laser element to a recording medium independently of reflection laser... |
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US20080175108 |
OPTICAL INFORMATION STORAGE MEDIUM SYSTEM AND METHOD OF GENERATING TRACKING ERROR SIGNAL
An optical information storage medium system includes an optical pick-up to detect a main push-pull signal and a sub-push pull signal, and a signal operating unit including first and second... |
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US20080192590 |
Information recording apparatus and information reproduction apparatus utilizing light
An information recording apparatus recording information on a recording medium by causing interference of a signal light beam and a reference light beam in said recording medium includes a movable... |
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US20080008060 |
Light-receiving element, optical head using same, and optical recording/reproduction apparatus using same
The invention relates to a light-receiving element for receiving light reflected at an optical recording medium, an optical head using the element, and an optical recording/reproduction apparatus... |
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US20070286037 |
Optical pickup device
A light source, an objective lens which concentrates light from the light source onto an information recording surface of an information storage medium, and a spherical aberration correction... |
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US20070237058 |
Recording and reproducing apparatus, recording and reproducing method, and method of determining type of recording medium
A method of effectively determining a recording medium, a recording and reproducing method using the same, and a recording and reproducing apparatus using the same are disclosed. Since a narrow... |
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US20070183279 |
APPARATUS FOR OPTICALLY RECORDING AND REPRODUCING INFORMATION
An apparatus for optically reproducing and recording information includes a light source, an objective lens, a light detecting element, and a processor. The objective lens focuses light beams... |
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US20060023578 |
Optical lens, focusing lens, optical pickup device as well as optical recording and reproducing device
With an optical lens made of a Y3Al5O12 monocrystal material of a cubic crystal structure, an optical lens having a high refractive index and a low optical absorption property in the range from an... |
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US20050007932 |
Optical head, optical disk drive, and optical system adjustment method
An optical head according to an example of this invention has a polarization beam splitter, objective lens, photodetection element, first optical diffraction element, and second optical... |
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US20090274020 |
OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS
An optical head unit is configured as an optical head unit corresponding to an optical recording medium of BD standard, and an optical recording medium of HD DVD standard. A magnification-variable... |
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US20070041287 |
Optical pickup apparatus capable of detecting and compensating for spherical aberration caused by thickness variation of recording layer
An optical pickup apparatus, including a light source to emit light, an objective lens to form a light spot on an optical recording medium by focusing the light emitted from the light source, an... |
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US20050002288 |
Optical pickup device and method for controlling the same
An optical pickup device includes a light source for emitting light to an Information recording medium; a light detector including a plurality of light receiving portions, the light detector... |
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US20120106307 |
OPTICAL DISC APPARATUS AND DEFOCUS CORRECTING METHOD
An optical disc apparatus in which a bias of a focusing error signal is changed to a value according to a recording power at timing corresponding to a predetermined address position before... |
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US20080267022 |
Method and System With Focus Control for Scanning an Information Carrier
The invention relates to a method and system for reading data on a data layer (105) of an information carrier (101) comprising one or more servo marks (108, 109) positioned relative to said data... |