Matches 1 - 50 out of 116 1 2 3 >


Match Document Document Title
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...

Matches 1 - 50 out of 116 1 2 3 >