Matches 1 - 50 out of 297 1 2 3 4 5 6 >
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7636293 Optical pickup device, recorder and/or reproducer  
An optical system and pick-up device having an optical magnification suitable for three different optical disc formats and a light emitting means for emitting a laser beam having a wavelength...
7623435 Optical pickup device, and information recording and reproduction device  
A sufficient S/N ratio in reproduction of an optical disk is achieved without complexing a circuit structure even if a data recording speed relative to the optical disk is increased. When data is...
7613099 Solid immersion lens, condensing lens, optical pickup device, optical recording and reproducing apparatus and method of forming solid immersion lens  
A solid immersion lens has an inclined portion formed on at least a part thereof from the tip end portion of the objective side to a spherical portion and an inclination angle θ is expressed as...
7613082 Optical pickup device, optical recording and reproducing apparatus and gap detection method  
An optical pickup device comprising at least a light source, an optical unit for irradiating an optical recording medium with a plurality of lights from this light source, a head unit located in an...
7593307 Objective optical system for optical pickup apparatus, optical pickup apparatus, driving apparatus for optical information recording medium, condenser lens and optical path compounding element  
An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P 1 (mm −1 ); and a second lens group having...
RE40908 Optical recording/reproducing apparatus for optical disks with various disk substrate thickness  
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...
7583580 Optical recording medium as well as optical recording and reproduction method  
An optical recording medium illuminated by light from a light source as near-field light using a focusing lens whose numerical aperture exceeds 1 to perform recording and/or reproduction is...
7570547 Objective lens unit and optical pickup device  
An objective lens unit, includes: an objective lens for irradiating and converging laser light on an optical disc as an a light information recording medium; and a lens frame for retaining the...
7564745 Optical pickup and optical disk apparatus  
An optical pickup includes a first optical system for collecting first laser light emitted from a first laser light source onto a first disk, and guiding reflected light from the first disk to a...
7561498 Optical pickup actuator having aberration correcting mechanism and method of assembling the same  
An optical pickup actuator and a method of assembling the same is provided. The method of assembling the optical pickup actuator comprises the steps of providing a blade having at least one...
7558181 Optical information recording/reproduction apparatus  
Provided is an optical information recording/reproduction apparatus in which a tilt margin in a radial direction of an optical disk is increased to thereby reduce a danger that the optical disk and...
7551371 Optical pickup apparatus and optical disc apparatus  
There is provided an optical pickup apparatus which includes a light source that generates light irradiating an optical recording medium; and an objective lens that collects the light irradiated...
7545726 Optical disc drive  
An optical disc drive includes a light source and an objective optical system for condensing a light from the light source onto a recording surface of an optical disc. A chassis which is movable...
7535663 Optical pickup actuator  
There is provided an optical pickup actuator for actuating a lens holder having an object lens according to an interaction between coils and magnets. The optical pickup actuator includes a...
7505390 Compatible optical pickup  
A compatible optical pickup includes a light source which emits a first light beam having a wavelength for a first recording medium; a twin light source which emits second and third light beams...
RE40638 Image pickup lens system  
An image pickup lens system includes a lens 1 of a meniscus shape having a first face as a convex concave face, and a diaphragm 2 disposed on an object side of the lens 1. The lens 1 ...
7492694 Optical pickup device and optical disk drive using the same  
An optical pickup device includes a light source unit an optical system which leads a return light beam to a predetermined light-receiving location and includes an object lens focusing each light...
7483357 Optical pickup and optical disc apparatus  
An optical pickup housing an optical system including a collimator lens for converting laser light incident on the collimator lens into an approximately parallel light beam, and an objective lens...
7463570 Multi-focus objective lens, optical pickup apparatus and optical information recording reproducing apparatus  
A multi-focal objective lens for use in an optical pickup apparatus for recording and/or reproducing information using a first light flux with a wavelength λ 1 on a first and second optical...
7457061 Lens actuator  
A lens actuator includes a carrier having a tubular shape having a through-hole provided therein. The through-hole is arranged to mount a lens therein. The lens actuator further includes plural...
7453788 Optical head, optical information recording/reproducing apparatus, computer, video recording/reproducing apparatus, video reproducing apparatus, server and car navigation system  
An optical head is provided that increases the light utilization efficiency and that can be adapted to high-speed recording and double-layer disks. A beam-shaping lens that shapes an elliptical...
7444047 Multiplexing optical system  
A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have...
7440383 Optical pickup device and recording and/or reproducing apparatus  
An optical pickup device includes an objective lens ( 2 ), with a numerical aperture (NA) being not less than 1, having a solid immersion lens ( 1 ) which is made up by a spherical portion ( 1 a )...
7426171 Optical lens, condenser lens, optical pickup, and optical recording/reproducing apparatus  
Disclosed herein is an optical lens suitable for a near-field optical recording/reproducing system. A condenser lens, optical pickup, and optical recording/reproducing apparatus each using this...
7417935 Optical system having an objective system and an optical aberration correcting element  
An optical system for use in an optical pickup device for recording and/or reproducing information on an optical recording media, the optical system having an optical axis and comprising: an...
7417939 Optical pickup including aberration correction lens assembly  
An optical pickup records information on an optical recording medium and retrieves information from the optical recording medium by radiating a light beam on the optical recording medium. The...
7417938 Optical pickup apparatus including collimator lens with first lens group having negative power and being fixed and second lens group having positive power and being movable  
Provided is an optical pickup apparatus which has a function for correcting spherical aberration caused by a thickness error of a transparent substrate and which is sufficiently compact, wherein a...
7403464 Lens and combination lens  
A lens and combination lens able to suppress deviation of an optical axis of a lens occurring at the time of combination and able to be adjusted at a high precision, a method of producing the...
7397752 Pickup for magneto-optical recording medium  
A pickup for a magneto-optical recording medium is provided, which improves quality of reproduced signals by eliminating a phase difference between the polarizations and is capable of coping with...
7394732 Object lens drive device, and disc recording and/or reproducing apparatus  
The present invention is directed to an object lens drive device adapted for moving an object lens in a focus direction of optical axis direction and in a tracking direction perpendicular to the...
7391704 Optical pickup device having chromatic aberration correction lens  
An optical pickup device includes a light source to emit light, an objective lens to focus the light on a recording medium to form a light spot, an optical path changer on an optical path between...
RE40371 Optical disc recording/reproduction apparatus and method  
An optical disc recording/reproduction apparatus for recording and/or reproducing a data by applying a beam from an optical head unit through a substrate onto/from a recording layer of the optical...
7362693 Near-field optical storage medium and optical data storage system therefor  
An optical data storage system writes or reads information with respect to an optical storage medium using an optical pickup including a solid immersion optical system or a solid immersion lens for...
7359308 Fixing structure for optical element and optical head device  
A fixing structure for an optical element includes a first element face of the optical element, a second element face of the optical element which is orthogonal to the first element face, a first...
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...
7342869 Optical-recording medium playback apparatus and optical-recording medium, including flying optical head features  
An optical-recording-medium playback apparatus includes a first optical member which focuses light emitted from a light-emitting unit on an optical recording medium, a second optical member which...
7339877 Optical head device and information processing apparatus  
In an optical head device, a light emission source for emitting a plurality of laser beams with different wavelengths and an optical system including an objective lens and a collimator are...
7289417 Lens correcting wavefront error caused by tilt and optical pickup using same  
An optical pickup having a plurality of objective lenses. At least one of the plurality of objective lenses is configured so that a type of wavefront error mainly generated by a tilt of the at...
7283452 Objective lens having two aspheric surfaces and a phase shifter and optical device including the same  
An objective lens in which a first wavelength is used in reading a first optical disk, a second wavelength is used in recording or reading a second optical disk, and a phase shifter provided with...
7251209 Optical pickup and a wedge beam splitter  
An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or...
7242647 Optical head unit and optical information writing/reading device  
An optical head unit is provided including a first light source emitting a light with a first wavelength, a second light source emitting a light with a second wavelength, and a third light source...
7239459 Scanning device including plastic high-numerical aperture objective  
An optical scanning device for scanning an information layer ( 104 ) of an optical record carrier ( 102 ) includes a radiation source ( 110 ) for generating a radiation beam ( 108 ) and a high-NA...
7187641 Objective lens and optical pick-up apparatus  
An objective lens has a first meniscus-shape lens including a first object-side surface having a positive reflective power; and a second meniscus-shape lens having a positive reflective power. The...
7170832 Optical scanning device  
A optical scanning device ( 1 ) for scanning an information layer ( 2 ) with a radiation beam ( 25 ) in a writing mode and a reading mode comprises a radiation source ( 7 ) for emitting the beam...
7158454 Optical device  
The present invention relates to an optical device which includes a first laser diode, a beam splitter, a first objective lens, a photo-detector, a second laser diode, a wedged plate beam splitter,...
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...
7145859 Compatible optical pickup and method of aligning optical axes therein  
An optical pickup includes a light source which emits first and second lights having different wavelengths for a first recording medium and a second recording medium having a relatively large...
7130134 Optical scanning device  
The invention relates to an optical scanning device ( 1 ) for scanning an information layer ( 2 ) by means of a radiation beam ( 4 ). The device includes: a radiation source ( 6 ) for providing...
7123571 Compound objective lens with fold mirror  
A compound objective lens includes a first lens element and a second lens element, the first element including a mirror surface for internally redirecting a radiation beam passing through the first...
7120109 Optical pickup with improved collimating lens for use with long and short wavelength laser beams  
An optical pickup capable of effectively reducing chromatic aberration that includes a collimating lens, which includes a diverging lens with diverging power and a focusing lens with focusing...
Matches 1 - 50 out of 297 1 2 3 4 5 6 >