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4906 results about "Optical pickup" patented technology
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Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
InactiveUS6052465APossible to separateDigitally marking record carriersDigital data processing detailsOptical pickupBarcode
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recoded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
Owner:PANASONIC CORP
Objective optical system for optical recording media and optical pickup device using it
InactiveUS20060077795A1Good optical performanceEfficiently focusRecord information storageOptical beam guiding meansOptical pickupDiffraction optics
An objective optical system for focusing light from a light source onto optical recording media includes an aperture control filter with a diffractive optical function formed as a glass plate with an aperture control structure on one side and a diffractive optical structure, such as a plastic diffractive optical element adhered to the glass plate on the other side, and an objective lens. The objective optical system focuses three light beams of three different wavelengths at three different numerical apertures onto desired positions of three different recording media with substrates of different thicknesses, such as a BD (or an AOD), a DVD, and a CD, that introduce different amounts of spherical aberration in the focused beams. The objective optical system provides compensating spherical aberration to the three light beams while keeping constant the distance between the aperture control filter with a diffractive optical function and the objective lens.
Owner:FUJI PHOTO OPTICAL CO LTD
Optical pickup apparatus and optical element
InactiveUS20040047269A1Reduce the number of partsReduce in quantityOptical beam sourcesRecord information storageOptical pickupLight flux
An optical pickup apparatus comprises first, second and third light sources to emit light fluxes of wavelength lambda1, lambda2 and lambda3 for conducting recording and / or reproducing information for first, second and third optical information recording mediums having respective protective substrates of thickness t1, t2 and t3 and a diffractive optical element located on a common optical path for the first, second and third light sources. A converged-light spot is formed on the first optical information recording medium with m-th order diffracted-light ray of the wavelength lambda1, on the second optical information recording medium with n-th order diffracted-light ray of the wavelength lambda2, and on the third optical information recording medium with k-th order diffracted-light ray of the wavelength lambda3 generated by the diffractive optical element respectively, wherein one of m, n and k is different from one of other two numbers.
Owner:KONICA CORP
Single detector receiver for multi-beam LADAR systems
ActiveUS20060197936A1Optical rangefindersTime-division optical multiplex systemsOptical pickupTime domain
A LADAR apparatus and a method for use in receiving a LADAR signal are disclosed. The apparatus includes an optical pickup capable of picking up a plurality of optical signals; a timing synchronization reference; a time domain multiplexer capable of multiplexing the optical signals into a multiplexed optical signal relative to the timing synchronization reference; and an optical detector capable of detecting the multiplexed optical signal. The method include time domain multiplexing a plurality of LADAR signals into multiplexed LADAR signal; detecting the multiplexed LADAR signal; and demultiplexing the detected LADAR signal.
Owner:LOCKHEED MARTIN CORP
Diffractive optical element, objective lens module, optical pickup, and optical information recording and reproducing apparatus
InactiveUS20060146422A1Small sizeOptical path of the pickup can be simplifiedRecord information storageSystems characterised by carrier structureOptical pickupOptical axis
An objective lens module includes a light-converging lens that is coaxially disposed with respect to an optical axis of first laser light having a first wavelength, and a transmission-type diffractive optical element that is coaxially disposed to cause diffracted light of first laser light to be incident on the light-converging lens. The diffractive optical element has an incident surface and an emergent surface, and first, second, and third regions that are provided on at least of the incident surface and the emergent surface inthe vicinity of the optical axis, and are sequentially defined according to different radius distances from the optical axis to have different diffraction gratings of different diffraction angles, respectively. The first region diffracts odd-order diffracted light of first laser light to the light-converging lens, the second region diffracts even-order diffracted light of first laser light to the light-converging lens, and the third region diffracts even-order or zero-order diffracted light of first laser light to the light-converging lens, such that the light-converging lens converges diffracted light from the first, second, and third regions with a predetermined numerical aperture.
Owner:PIONEER CORP
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
InactiveUS20060023577A1Reliable detectionEasy to controlRecord information storageOptical beam guiding meansOptical pickupLight beam
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 light to perform recording and / or reproduction, and wherein two or more recording and reproduction beam spots are positioned in a recording and reproduction area between guide tracks on the optical recording medium to perform recording and / or reproduction, as a consequence of which application to near-field optical recording and reproduction is ideally performed, and high transfer rates become possible.
Owner:SONY CORP
Diffractive optical element that polarizes light and an optical pickup using the same
InactiveUS20040233534A1Integrated optical head arrangementsPolarising elementsOptical pickupLength wave
Owner:PANASONIC CORP
Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method
InactiveUS6870805B1Simple structureQuantity of light is lessOptical beam sourcesNon-mechanical controlsOptical pickupOptical axis
An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
Owner:KONICA CORP
Objective lens, optical pick-up device, and optical disk device
InactiveUS20050007906A1Reduce thicknessSmall sizeOptical head protectionIntegrated optical head arrangementsOptical pickupMiniaturization
To provide an optical pickup device and optical disk device capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where coping with various wavelengths of laser including a blue laser. An optical pickup device comprising light sources for respectively emitting a plurality of different wavelengths of light, unit structured for causing at least a part of the light emitted from the light sources to pass a same optical path; and focusing unit for focusing the light. The focusing unit includes at least first and second focusing parts, the first focusing part being to focus mainly a wavelength of light different from a wavelength of light to be mainly focused by the second focusing part.
Owner:PANASONIC CORP
Optical element and optical pickup
InactiveUS20060273284A1Exclude influencePrevent degradationLiquid crystal compositionsRecord information storageOptical pickupElectrical conductor
On one side of a liquid crystal layer, a first electrode is provided, and, on the other side of the liquid crystal layer, a second electrode, composed of a plurality of individual electrodes, and a third electrode are provided. The second and third electrodes have holes that are increasingly small away from the liquid crystal layer. When the potential at the third electrode is set equal to or lower than the potential at the second electrode, the liquid crystal layer acts as a convex lens; when the potential at the third electrode is set higher than the potential at the second electrode, the liquid crystal layer acts as a concave lens. The range in which the focal length can be varied depends on the diameters of the holes, and giving the holes of the different electrodes varying diameters helps widen the range. Moreover, conductors can be laid to reach the electrodes at the outer edges thereof so as not to directly face the liquid crystal layer. This helps eliminate the influence of the conductors on the electric field distribution in the liquid crystal layer.
Owner:KONICA MINOLTA INC
Optical pickup device, optical disk apparatus, and light-receiving unit
InactiveUS20060028935A1Improve configurationSpherical aberration in the short wavelength light can be reducedIntegrated optical head arrangementsRecord information storageOptical pickupLength wave
An optical pickup device, comprises a first light source emitting light with a short wavelength; a second light source emitting s light with a wavelength longer than that of the first light source; an optical member guiding the light from the first light source and the light from the second light source on almost the same optical path; a focusing member focusing the light from the optical member; a movable lens provided between the optical member and the focusing lens; and a drive member driving the movable lens, wherein a position of the lens when at least one of recording and reproducing of information is carried out on a medium using the light from the first light source is made different from a position of the lens when at least one of the recording and reproducing of information is carried out on the medium using the light from the second light source.
Owner:PANASONIC CORP
Objective optical system, optical pickup apparatus and optical disk drive apparatus
InactiveUS20050265151A1Improve Design PerformanceImprove utilization efficiencyRecord information storageOptical beam guiding meansOptical pickupOptical axis
An objective optical system for use in an optical pickup apparatus which reproduces and / or records information on an information recording surface of first-third optical disks, the objective optical system includes a first optical element, a first part comprising a material A, a second part comprising a material b, wherein the first part and the second part are laminated on the first optical element in an optical axis of the objective optical system, and the material A and the material B have different Abbe constants for d-line each other and a first phase structure formed on a boundary between the first part and the second part.
Owner:KONICA MINOLTA OPTO
Photodetector, method for manufacturing the same, and photodetection system
InactiveUS20100224767A1Improve accuracyLow costBeam/ray focussing/reflecting arrangementsSolid-state devicesOptical pickupPhotovoltaic detectors
A photodetector used in, for example, an optical pickup device includes: a photodetection unit including a plurality of photodetection elements and provided on a semiconductor chip; a light transmitting unit formed on the upper surface of the photodetection unit; and a light shielding layer having an optical aperture and disposed on the upper surface of the light transmitting unit, with these components being formed integrally. The light transmitting unit is configured such that the distance between the optical aperture and the photodetection unit is maintained constant, and the optical aperture is formed such that the inner portion of an incident light beam passes therethrough. The positioning of the photodetector and the positioning of the optical aperture such as a pinhole or a slit for adjusting the light beam entering the photodetection elements of the photodetector can be made at the same time.
Owner:TDK CORPARATION
Optical pickup device, optical information recording and reproducing apparatus, expander lens, coupling lens and chromatic aberration correcting optical element
An optical pickup apparatus includes first and light sources; an objective lens; a spherical aberration correcting optical unit; and a chromatic aberration correcting optical element which includes a diffractive surface on at least one of optical surfaces of the chromatic aberration correcting optical element such that a diffractive structure which is constructed by a plurality of ring-shaped zones separated by fine steps is formed on the diffractive surface, wherein the depth of steps along an optical axis is designed so that n2 which is a diffraction order of a diffracted ray having a largest diffraction efficiency among diffracted rays caused when the second light flux enters into the diffractive structure, is lower order than n1 which is a diffraction order of a diffracted ray having a largest diffraction efficiency among diffracted light rays caused when the second light flux enters into the diffractive structure.
Owner:KONICA MINOLTA OPTO
Monocular three-dimensional imaging
ActiveUS20080013943A1Stereoscopic photographyCamera diaphragmsOptical pickupThree dimensional imaging
A three-dimensional imaging system uses a single primary optical lens along with various configurations of apertures, refocusing facilities, and the like to obtain three offset optical channels each of which can be separately captured with an optical sensor.
Owner:MEDIT CORP
Optical disk identification device
The present invention provides an optical disk identification device for use in an optical disk reproduction apparatus for reproducing a plurality of types of optical disks based on information recorded on the optical disks. Recorded information is reproduced from an optical disk 1 while an optical pickup 3 is fixed at a focal position Pf. A focal position detector 32 generates a focal position detection signal Sg that is either at a high level or at a low level at the focal position Pf based on reproduced signals Sa, Sb, Sc, Sd. An RF signal detector 20 detects an RF signal Srf from the reproduced signal based on the focal position detection signal Sg. A recording density identifier 31, S14, S20 identifies the recording density of the optical disk based on the RF signal. A format identifier S16 to S24 identifies the type of the optical disk based on the detected recording density.
Owner:PANASONIC CORP
Optical pick-up apparatus
InactiveUS6898168B2Suppress generationIncrease the number ofOptical beam sourcesRecord information storageOptical pickupPhotovoltaic detectors
An optical pickup apparatus for conducting recording and / or reproducing information of an optical information recording medium, comprises a light source; a converging optical system having an objective lens; and a photo-detector. The converging optical system comprises a plastic lens and a spherical aberration deviation correcting element to correct deviation of a spherical aberration of the converging optical system. A numerical aperture of the objective lens at an image-side is 0.65 or more.
Owner:KONICA CORP
Photodetector-amplifier circuit and optical pickup device
ActiveUS20060054789A1Guaranteed uptimeMaterial analysis by optical meansRecord information storageOptical pickupAudio power amplifier
The present invention provides a photodetector-amplifier circuit capable of eliminating an influence of noise due to stray light entering a non-selected photodetector to stably select and switch a photodetector. The photodetector-amplifier circuit of the present invention comprises photodetectors 12 and 13. The photodetector 12 is connected via a switch 16 between an inverting input terminal of an operational amplifier 11 and GND, and is also connected via a switch 18 to a voltage source Vcc. The photodetector 13 is connected via a switch 17 to the inverting input terminal of the operational amplifier 11 and GND, and is also connected via a switch 19 to the voltage source Vcc.
Owner:PANASONIC SEMICON SOLUTIONS CO LTD
Semiconductor laser device, optical pickup device and semiconductor device
InactiveUS20110158273A1High resistivitySemiconductor/solid-state device detailsSemiconductor laser structural detailsPower semiconductor deviceOptical pickup
A semiconductor laser device includes a Si(100) substrate in which a recess having an opening and a bottom face surrounded by inner wall surfaces is formed, a semiconductor laser element placed on the bottom face, and a translucent sealing glass, mounted on top of the Si(100) substrate, which seals the opening. The laser light emitted from the semiconductor laser element is reflected by a metallic reflective film formed on the inner wall surface and then transmits through the sealing glass so as to be emitted externally.
Owner:SANYO ELECTRIC CO LTD
Method and apparatus for buffering data in a multi-beam optical disk reader
Methods and apparatus are disclosed for buffering and reordering data blocks read simultaneously from multiple tracks of an optical disk, so that they may be delivered in sequential order to a host computer. The methods involve the use of numerous processes to receive read commands, position an optical pickup, handle memory management tasks, process data blocks as they arrive, and send data blocks to the host computer in sequential order as they become available. The reordering of data blocks is achieved by checking each data block as it arrives in a "read process" to see if it may be linked in a sequential chain with a data block that arrived from the next track. Additionally, methods for determining if a requested data block is in the range of blocks that are currently being read, and methods for determining when the optical pickup may be moved to read the next set of tracks are described.
Owner:HANGER SOLUTIONS LLC +1
Optical pickup apparatus and optimal light spot focusing method
InactiveUS20020159378A1Minimized in sizeOptical beam sourcesOptical detectorsOptical pickupPhotodetector
An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light beam, an objective lens to focus the first light beam on a recording medium, a diffraction member to divide the first light beam reflected by the recording medium into five light regions, the diffraction member having a first diffraction region having a wide width in a direction corresponding to a tangential direction of the recording medium and second through fifth diffraction regions sequentially arranged around the outside of the first diffraction region in a direction corresponding to a radial direction of the recording medium, and a first photodetector having first through fifth light receiving portions to receive the first light beam reflected by the recording medium.
Owner:TS OPTICS CORP
Gallium nitride group semiconductor laser device and optical pickup apparatus
The gallium nitride group semiconductor laser device of this invention includes an active layer made of a nitride semiconductor formed between cladding layers and / or guide layers made of a nitride semiconductor on a substrate, wherein a light absorption layer is formed between the substrate and one of the cladding layers located closer to the substrate, the light absorption layer being made of a semiconductor having an energy gap substantially equal to or smaller than an energy gap of the active layer.
Owner:SURFWAX +1
Optical device, method of producing the same, optical pickup, and optical information processing device
InactiveUS20050195485A1Improve compatibilitySmall sizeIntegrated optical head arrangementsOptical articlesInformation processingOptical pickup
An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a circular-belt-like region where the sub-wavelength diffraction grating is formed, and a center portion where the sub-wavelength diffraction grating is not formed. A vertically polarized light beam used for operations on a blue-light optical recording medium A has a phase difference in the sub-wavelength diffraction grating to be an integral multiple of 2π and hence is transmitted through the sub-wavelength diffraction grating. A horizontally polarized light beam used for operations on a blue-light optical recording medium is diffracted by the sub-wavelength diffraction grating. The light path length L1 of the light beam passing through the circular-belt-like region is the same as that of the light beam passing through the center portion without the sub-wavelength grating.
Owner:RICOH KK
Optical recording medium
InactiveUS6063468ALarge numerical apertureShorten working distanceRadiation applicationsMechanical record carriersOptical pickupSurface layer
An improved optical recording medium is provided, and includes a surface of the optical recording medium having at least pits and grooves formed therein, a recording layer formed adjacent the surface of said optical recording medium, and a light transmissive layer formed adjacent the recording layer. Information is recorded and / or reproduced by irradiation of light from an optical pickup employing an objective lens having a numerical aperture of 0.7 or larger through the light transmission layer. At least a surface layer of said light transmissive layer is formed of a material having a Young's modulus of 70 GPa or larger thereby greatly reducing or eliminating scratches from the surface of the optical recording medium while allowing for an increase in the storage capacity of the optical storage medium.
Owner:SONY CORP
Constant angular velocity disk label printing
InactiveUS7015939B2Average permeabilityTelevision system detailsFilamentary/web record carriersOptical pickupLight beam
Owner:YAMAHA CORP
Electrowetting device and varifocal lens, optical pickup device, optical recording/reproduction device, droplet operation device, optical element, zoom lens, imaging device, light modulating
InactiveUS20080100905A1Drive voltage causing an equal change in focal length may be reducedReduce film thicknessPiezoelectric/electrostriction/magnetostriction machinesStatic indicating devicesOptical pickupEngineering
Disclosed is an electrowetting device. The electrowetting device includes a conductive or polar liquid material, and an electrode applying voltage to the liquid material through a dielectric layer. In the electrowetting device, the dielectric layer is formed as an anodized portion made of a metal oxide formed by anodizing the electrode, and a voltage applying unit applying voltage between the electrode and the liquid material and a polar capacitor are placed between the electrode and the liquid material.
Owner:SONY CORP
Slim type optical disc drive
InactiveUS6910218B2Easy to carryEasy constructionCarrier constructional parts dispositionApparatus for flat record carriersOptical pickupPrinted circuit board
Owner:SAMSUNG ELECTRONICS CO LTD
Optical disk apparatus
InactiveUS20110063957A1Low costRecord information storageDigital signal error detection/correctionOptical pickupActuator
In an optical disk apparatus, an optical pickup includes an actuator for driving an object lens, and a sensed signal output part for making it possible to generate a tracking error signal and a lens error signal by addition / subtraction, and a signal processor includes a servo signal generator for generating a tracking error signal and a lens error signal on the basis of a signal supplied from the sensed signal output part, and a tracking offset correction quantity signal generator supplied with the lens error signal to output a tracking offset correction quantity signal. DC (direct current) offset correction is conducted by conducting addition / subtraction between the tracking error signal and both the lens error signal and the tracking offset correction quantity signal.
Owner:HITACHI MEDIA ELECTORONICS CO LTD
Optical pickup and optical recording and/or reproducing apparatus adopting the same
InactiveUS20060002247A1Improve optical efficiencyIncrease speedRecord information storageOptical beam guiding meansOptical pickupLight spot
An optical pickup and an optical recording and / or reproducing apparatus adopting the same are provided. The optical pickup includes an optical unit, first and second objective lenses, and an optical path switching unit. The optical unit illuminates light onto an information storage medium and receives light reflected from the information storage medium to detect an information signal and / or an error signal. The first and the second objective lenses focus incident light to form a light spot on an information storage surface of the information storage medium. The optical path switching unit selectively directs the light incident from the optical unit to one of the first and second objective lenses. In the optical pickup, since the light quantity directed to a plurality of objective lenses may be maximized, optical efficiency is increased and thus high-speed operation may be attained.
Owner:SAMSUNG ELECTRONICS CO LTD
Optical pickup appratus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method
InactiveUS6950384B2Improve the level ofRemarkable effectOptical beam sourcesRecord information storageOptical pickupOptical axis
Owner:KONICA CORP
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