Information recording and reproducing apparatus and method for controlling positions of optical pickup device and objective lens used for the apparatus

Multi-dimensional data signal and systems for manipulating the same

Method of making fluorescent discs

High capacity digital data storage by transmission of radiant energy through arrays of small diameter holes

High capacity digital data storage by transmission of radiant energy through arrays of small diameter holes

Optical head and optical disk unit

Diffraction element and optical pick-up apparatus having the same

Optical pickup device and focusing control method of the same

Optical recording device

Optical disk apparatus for detecting tilt of an optical disk, and an optical disk for tilt detection

Optical information recording medium manfacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus

Optical information processing apparatus

Optical pick-up apparatus and method for multi-optical disk type recording/reproducing

Optical pickup apparatus employing a grating and a hologram that generate multiple beams detected by a photodetector

Optical head and optical device provided with optical head

Optical pickup device

Optical data storage system having combined fluorescent three-dimensional information carrier

Optical pick-up apparatus

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

Information reproduction apparatus

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

Optical pickup, optical disk drive, light detecting apparatus, and signal generating method for optical pickup

Manufacturing method of pickup device

Optical pickup

Optical disk device

Optical head, an optical disk device and an integrated circuit

Optical head with light sources of different wavelength

Optical disk system with delay-difference detector without delay lines

Small optical disk drive

Optical disk apparatus using mechanism for controlling spherical aberration

Optical scanning device

Optical disk apparatus and method of controlling optical disk apparatus

Method and system for encoding and detecting optical information

Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals

Optical disk recording device and pickup device

Focus error detecting device and optical pickup apparatus provided with the same

Optical disk device with photodetector

Optical element, method for manufacturing such an element and a method for aligning a light beam and such an element

Optical head

Optical pickup

Optical head, optical drive apparatus, and method for generating tracking error signal

Light receiving and emitting integrated device, optical pickup provided therewith, and optical disk apparatus

Optical pickup apparatus

Integrated type light-emitting and light-receiving element, optical pickup device for optical information medium and optical disc apparatus

Integrated optical system and method of manufacturing the same and information recording and/or reproducing apparatus using the integrated optical system

System and method for detecting and recovering from an off-format state in an optical disc drive

Optical pickup apparatus having optical detection area for compensating for tracking error offset

Device for reading and/or writing optical recording media

Optical disc discriminating apparatus, optical disc discriminating method, optical disc recording apparatus and optical disc reproducing apparatus

Optical pickup device that corrects the spot shape of reflected light beams

Optical head device

Optical pick-up head, optical information apparatus, and optical information reproducing method

Optical pickup device for optical disks having different track pitches

Optical pickup device

Magneto-optical recording medium and magneto-optical recording device

Optical recording/reproduction apparatus having mechanism for correcting spherical aberration

Optical reproducing apparatus

Method and apparatus for optical head and optical information reproducing

Apparatus for switching modes based on quantity of light received in first section of a photodetector section and first plus second section for controlling a laser diode output

Hologram recording medium, recording/reproducing method and recording/reproducing apparatus

Holographic optical element, position shift detecting apparatus, optical pickup apparatus, optical recording medium drive and method of fabricating holographic optical element

Photodiode having light-absorption part separated by PN junction and method of fabricating the same

Optical bench, slim optical pickup employing the same and method of manufacturing the optical bench

Deformable mirror and information device having the deformable mirror

Optical head, optical recording and/or reproducing apparatus and integrated optical module

Optical pickup device with a plurality of laser couplers

Optical pickup

Optical disk with plural signal mark positions in a direction substantially perpendicular to tracks

Optical detection device for detecting an intensity of a light beam and for detecting data transmitted by the light beam

Optical miniaturized module, optical pickup device, and optical disk device provided with light source and photodetector

Error signal detection apparatus and method for optical recording/reproducing system

Dual three-spots optical scanning device

Two-dimensional light-receiving element, optical reproducing apparatus and optical recording and reproducing apparatus

Optical pickup

Optical system for detecting data signal and tracking error signal

Magneto-optic optical miniaturized module and magneto-optic optical pickup device

Optical storage device and reading method for optical storage medium

Optical head device and optical information recording/reproducing apparatus

Two-dimensional photoreceptor array, holographic optical information playback device, and holographic optical information recording device

Optical pickup device using polarizing hologram element and hologram laser therefor

Slim optical pickup

Method and device for detecting optical data and reading-writing apparatus for optical data

Optical pickup apparatus having an improved holographic unit, and optical disk drive including the same

Tilt sensor and optical disk drive

Optical head, LD module, optical recording-and-reproducing apparatus and diffraction element used in the optical recording-and-reproducing apparatus

Inclination detector, optical head, optical information processor computer, video recorder, video reproducer, and car navigation system

Compatible optical pickup apparatus

Optical pickup apparatus, optical data recording/reproducing apparatus, and optical data recording/reproducing method

Optical storage device, optical device and servo controlling method therefor having first and second focus error signal detectors with different detection ranges and target trajectory generator

Virtual head for generating a multi-dimensional data signal

Optical pickup and optical recording and/or reproducing apparatus adopting the same

Optical disc apparatus and spherical aberration correction controlling apparatus

Optical head and recording and/or reproducing apparatus employing same

Optical head and optical disk apparatus

Optical pickup tracking error detecting method and optical pickup device

Optical integrated device and optical pickup apparatus

Optical head, optical disk drive, and optical system adjustment method

Optical pick-up, optical disk apparatus and information processing apparatus

Optical pickup apparatus for detecting a focus-error signal using a spot size detection method

Photodetector array having different photodiode structures