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RE40229 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7352662 Molded coil device for actuator of disc drive  
A molded coil device includes a coil comprised of a plurality of turns of a conductive material through a plurality of planes and an integral body comprised of an insulating and nonmagnetic...
7348529 Optical device and optical pickup device  
An optical device diffracts incident light with a hologram element 19 and receives the diffracted light with light receiving regions 20 A to 29 on a light receiving element 12. The light...
7317675 Method of manufacturing optical head  
An integrated unit in which a light source and a light emitting diode are combined into one component is fixed to an optical bench. Then, relative position adjustment of an objective lens actuator...
7313073 Optical pickup and optical disk system  
An optical pickup for reading information written on an optical disk is equipped with a laser diode having a front facet which emits light, a parallel light ray portion which collimates the emitted...
7307930 Optical disk apparatus  
An optical disk apparatus includes a digital signal processor, a photo-detector circuit, and a sample-and-hold circuit. By using a sampling-timing signal generated by the sampling-timing signal...
7304916 Optical head, information storage apparatus, optical head design apparatus, and optical head design program storage medium  
An optical head has a first propagation section made of a first low extinction material and installed along an optical axis, a pair of second propagation sections which, being made of a second low...
7283448 Integrated optical pickup and method of manufacturing the same and optical information storage system including the optical pickup  
An integrated optical pickup and a manufacturing method thereof, and an optical information storage system including the pickup. The integrated optical pickup includes a light source; a main...
7280457 Optical disc with an improved compound lens  
The present invention relates to an optical pickup and a disc drive for preventing aberrations of laser light due to variations in temperature and humidity to ensure satisfactory characteristics of...
7251208 Optical pick-up system for use in an optical disk device including use of improved gratings with more efficient beam diffraction  
The present invention is an optical pick-up system for use in an optical disk device including more efficient beam diffraction for tracking purposes. The system may be used for one or more types of...
7248544 Optical head and recording and/or reproducing apparatus employing same  
Disclosed is an optical head in which position adjustment of a photodetector light receiving surface or component parts may be simplified, production costs may be reduced and operational...
7242660 Power control device and method of single base power for optical disk drive  
A power control device of single base power is provided for an optical read/write module of an optical disk drive. The optical read/write module generates a power feedback signal and a temperature...
7230888 Light emitting device and information processing apparatus  
A light emitting device according to the present invention includes: a first light source for emitting light having a first wavelength; and a second light source for emitting light having a second...
7206265 Device capable of detecting vibration/shock  
A device capable of detecting vibration/shock includes a laser diode capable of transmitting a laser beam and a vibration/shock detector capable of detecting vibration or shock, wherein the laser...
7202464 Optical bench, slim optical pickup employing the same and method of manufacturing the optical bench  
An optical bench is provided, as are a thin optical pickup that employs the optical bench, and a method of manufacturing the optical bench. The optical bench includes a light source for generating...
7197004 Optical pick-up apparatus  
An object of the invention is to provide a structure for suppressing occurrence of a track offset in a tracking control using DPP method, and simplified apparatus assembly adjustment. When a...
RE39447 Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses  
An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one...
7151736 Objective lens and optical pickup device  
An objective lens for converging light onto an information recording medium includes a refracting interface for converging an incident light into a convergent light, and a refractive index varying...
7126905 Information recording medium and information recording/reproducing apparatus to increase recording density  
An information recording medium 101 includes: a transparent substrate 109 having a first surface A and a second surface B opposite to the first surface A; reflectance reduction means 110 ...
7072268 Optical pickup apparatus, optical disk apparatus, and tracking error signal detection method  
An optical disk apparatus of this invention includes a light source, an objective lens which focuses a laser beam output from the light source onto an optical disk, a hologram which divides an...
7042819 Optical pickup apparatus  
An object of the present invention is to provide an optical pickup apparatus which changes characteristics of a light-emitting device or hologram to reduce problems of track servo deviation due to...
7038994 Optical pickup device with a plurality of laser couplers  
An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup...
7023765 Optical element, optical pick-up device and manufacturing method of the optical element  
An optical element for recording and/or reproducing information of an optical information recording medium, includes an optical element body having an incident surface and an opposite surface...
7012762 Micro optical pickup head module, method of manufacturing the same and method of manufacturing the objective lens of the same  
At least two Fresnel lenses are formed on a transparent substrate, and a set of parallel plates are established in an acute included angle (from 19° to 90°) with the transparent substrate by an...
6958969 Optical semiconductor component package and optical pickup device  
In an optical semiconductor package according to the present invention, the component bearing surface of the stem having an outline made up of opposed first and second circular-arc parts, a first...
6954407 Current to voltage converter amplifier for use in a data reading device  
A device for amplifying and converting current signals into voltage signals for processing The current signals are delivered by sensors, e.g. optical transducers, magnetical heads. The current...
6940798 Optical-disk reproducing apparatus, optical pickup apparatus and optical-disk recording and reproducing apparatus  
The present invention is capable of selectively reproducing an information signal from an optical disk with any of a plurality of types having different track pitches of recording tracks, that is,...
6885491 Diffraction-optical component, illumination system and exposure system comprising such a diffraction-optical component as well as an exposure method employing such an exposure system  
A diffraction-optical component for providing a radiation-diffracting grating structure is proposed, comprising a surface wave device including a substrate 43 , a surface wave source 47 ...
6882614 Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses  
A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical...
6873580 Objective lens alignment in optical pickup unit assembly  
Disclosed is a method of attaching components of an optical head. In one embodiment, first and second optical assemblies of the optical head are positioned adjacent to each other. The first optical...
6819637 Magneto-optical apparatus and optical head  
A magneto-optical disk drive that prevents the track shift signal from overlapping the MO signal, even when the optical head projects a divergent spherical wave onto the beam splitter. This...
6781944 Optical information processor with monolithically integrated light emitting device, light receiving devices and optics  
In an optical head of a DVD drive, a light-emitting device and light-receiving devices are disposed on one face of a substrate, and on the other face of the substrate, a diffraction light...
6778486 Laser module, optical head and optical information recording and reproducing apparatus  
In a laser module holding a semiconductor laser chip and a reflecting surface, to perform positioning on the semiconductor laser chip with high precision, and reduce the period of production, so as...
6768562 Correcting method of light beam position in light beam scanning apparatus  
A method for correcting recording positions of light beams scanned by a light beam scanning apparatus, in which at least one of plural light beams is deflected by an optical deflecting device and...
6760297 Substrate unit for optical head and method for manufacturing the same  
There is disclosed a substrate unit comprising a light emitting element attachment surface for attaching a light emitting element which emits laser light substantially in parallel to the attachment...
6757224 Integrated optical component and optical pick-up device  
Provided are an integrated optical component which can prevent a detection optical system being affected by variation in working temperature, and a pick-up device using the integrated optical...
6747939 Semiconductor laser device and optical pickup device using the same  
A semiconductor laser device is provided which can carry out recording and reproduction with respect to optical disks with different formats. In this semiconductor laser device, a...
6717893 Laser thermal management system  
An optical pickup assembly includes an optical pickup unit (OPU), a thermally conductive plate, and a flex circuit. The flex circuit is mounted atop the plate. The OPU is also mounted atop the...
6687208 Laser drive integrated circuit and optical disk apparatus using the same  
A laser drive integrated circuit and an optical disk apparatus using the laser drive integrated circuit for forming high-density marks. The optical disk apparatus includes a drive waveform...
6683830 Apparatus and method for detecting wobble defect  
An apparatus and method are provided receiving wobble signals indicative of a wobble pattern formed on an optical medium. A wobble lock/unlock detector detects whether the wobble signals exist...
6674059 Objective lens and optical pickup  
By providing an area of a smaller numerical aperture and an area of a greater numerical aperture on an objective lens, forming holograms of different characteristics corresponding to the respective...
6671236 Light receiving and emitting compound element and optical pick-up device using the same  
A light emitting portion ( 1 ) and an objective lens ( 3 ) for collecting a light of the light emitting portion are provided. The light receiving portion ( 2 ) is provided in the vicinity of the...
6646975 Semiconductor laser array and its manufacturing method, optical integrated unit and optical pickup  
A semiconductor laser array including a plurality of index-guided semiconductor lasers different in oscillation wavelength is made by collectively controlling their double transverse modes and...
6631302 System and method for aligning components of optical head  
Extremely small optical heads are being developed for use in optical storage devices. The heads typically include a light source, a lens and a photodetector array. The beam of light generated by...
6621775 Optical head, optical recording and/or reproducing apparatus, and tracking error signal detecting method  
An optical head comprises a first optical system which irradiates a light of a first wavelength towards the information recording medium and detects a return part of the light reflected by the...
6614957 Optical configuration for improved lens performance  
Described herein is a system and method for extending the performance of a simple lens system with curvature of field to image a set of optical light guide sources extended over a wide field of...
6614825 Monolithic VCSEL-based optical pickup and servo control device  
A VCSEL-based monolithic optical pickup system for use with optical recording media with a retaining member, a plurality of VCSELs disposed on the retaining member for emitting laser beams, a...
6614744 Method and apparatus for reading out and writing to an optical disc  
A method and apparatus utilizing a multiple quantum well modulator/emitter/detector pixel in a bilinear array permits reading or writing to an optical disc in parallel such that information may...
6577564 Optical pickup device  
An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser...
6529454 Integrated optical component, optical pickup, and optical disc device  
A cylindrical lens 39 for generating focussing error signals is formed as one with a portion of an optical component 33 of a transparent material lying on an optical path L 2 that is an...
Matches 1 - 50 out of 287 1 2 3 4 5 6 >