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Match Document Document Title
7369482 Optical pick-up aberration correcting mirror, aberration correcting method and optical pick-up  
It is an object of the invention to provide an aberration correcting mirror which has a small size, power saving, a low voltage, a low price and high precision. In particular, it is an object to...
7342868 Compatible optical pickup apparatus  
A compatible optical pickup apparatus and method are provided. The apparatus and method include a first light source for generating and emitting a first light having a predetermined wavelength, a...
7321533 Optical pickup device having a wavelength selecting film and an optical reflector  
An optical pickup device has first and second light sources that emit first and second laser beams of different wavelengths, an object lens that concentrates the first and second laser beams on a...
7280449 Optical head and recording and/or reproducing apparatus  
An optical head in which pre-formatted signals may be detected as variations in the amplitude or the phase in the pre-formatted signals are suppressed, and a recording and/or reproducing apparatus...
7272100 Optical head apparatus  
The present invention is for providing optical head apparatus that can control scatter occurring at locations along the length of the optical path, when laser beam is transmitted through prism...
7180668 Optical pickup device and optical disc device  
This invention is an optical pickup device having a composite optical element ( 32 ) which has a first diffraction grating ( 45 ) for splitting a light beam emitted from a light source ( 31 ) into...
7170846 Light receiving and emitting unit and optical pickup using the same  
A light receiving and emitting unit has a plurality of light sources, a light receiving element, a light control unit, and an optical block. The optical block has at least a first and a second...
7161891 Optical scanning device  
An optical head for use in the scanning of a record carrier, the record carrier having data stored on data tracks therein on a plurality of information layers ( 3, 4 ) at a plurality of depths...
7149174 Optical pickup  
An optical pickup which appropriately detects reflected light and return light reflected back from an information recording medium even if a laser light B 1 emitted from a light source varies in...
7088664 Reflection type compound prism and optical pickup apparatus employing the same  
A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a...
7002893 Optical head with passive temperature compensation  
An optical pickup apparatus includes a light source and a light detector provided on a stem for detecting source emitted light reflected by an optical recording medium; and a light separating...
6987614 Optical pickup and optical disc drive device  
This invention is an optical pickup device having a composite optical element ( 32 ) which has a first diffraction grating ( 45 ) for splitting a light beam emitted from a light source ( 31 ) into...
6961298 Optical head device having a plurality of optical elements with various transmission efficiencies  
In an optical head device for recording/reproducing information on/from an optical recording medium, at least one laser light source emits a laser light beam provided with a first polarized light...
6961297 Optical head device  
The present invention provides for a optical head device having a beam-guiding optical device to bring beams of different wavelengths which are emitted by separate light sources together onto the...
6925045 Optical pickup having two wavelength laser and simple structure  
In an optical pickup used in a DVD player, a photo detector has a predetermined photo sensing area pattern for detecting a returning laser beam from an optical disc. The returning laser beam is...
6876622 Anamorphic prism, optical head and optical recording/reproduction device  
An anamorphic prism according to the invention comprises a first prism 2 made of a first light transmitting material and a second prism 3 made of a second light transmitting material, the first...
6807140 Optical pickup device for emitting laser beams having different wavelengths and optical disk driver for use therewith  
In an optical pickup device for emitting at least two laser beams suitable for respective optical recording mediums selectively operated on an optical disk driver so that a signal is read out from...
6744720 Optical element and optical pick-up  
An optical pick-up able to reduce a change of an optical axis of a light beam emitted to a photodetector when the optical element is tilted. An optical element in the optical pick-up is struck with...
6721260 Electromagnetically controlled drive system and method  
An electromagnetically controlled drive system for accessing a data storage medium comprises an optical signal generator and a reflector element adapted to receive an optical signal from the...
6714370 Write head and method for recording information on a data storage medium  
A recording head for use in conjunction with a magnetic storage medium, comprises a waveguide for providing a path for transmitting radiant energy, a near-field coupling structure positioned in the...
6700855 Optical disk device  
A light emitted from a light source ( 11 ) or a return light from a magneto-optical discs ( 7 a , 7 b , 7 c or 7 d ) is transmitted by a polarization maintaining optical fibers ( 15 a , 15 b , 15...
6657931 Optical disc drive for performing read/write operations on optical disks  
An optical disc drive compatible with optical discs of different types, for example, is provided. For focusing, through an optical system used in common with the different types of optical discs, a...
6625102 Optical device  
The present invention provides an optical device that eliminates side lobes or their components from a super-resolution optical spot, and that is capable of electrically switching between super...
6594221 Optical pickup device  
An optical pickup device includes an illuminating optical system for focusing light beams, split in a main beam and at least one side beam, onto a track on an information storage surface of an...
6567366 Optical pickup using laser light of different wavelengths to record and reproduce information to/from a disk  
An optical pickup records information on a recordable and reproducible disk and reads information therefrom. The optical pickup includes a laser light source for emitting first laser light in case...
6542447 Magneto-optical pickup  
A magneto-optical pickup includes a light source for emitting a light beam, the light beam traveling to an information recording medium along a first optical path, a first light receiving element...
6538974 Method and system for suppressing spurious reflections  
An optical system and method for selective transmission of light between a source of light and set of storage disks along an optical path includes at least one polarization maintaining optical...
6507549 Device for reading from and/or writing to optical recording media  
A device for reading from and/or writing to optical recording media, the device comprising a light source for producing a scanning beam, a photodetector for detecting the scanning beam reflected by...
6396791 Optical pick-up apparatus  
In order to condense the light beam on the second optical disc 1 b , the opening limiting portion 20 for limiting the beam diameter is disposed between the condenser lens 14 for condensing the...
6359851 Optical information detection apparatus  
An optical information detecting apparatus includes a first optical system focusing an optical beam on a recording surface of a recording medium and a second optical system directing a reflection...
6349082 Optical disc apparatus  
Disclosed is an optical disc apparatus compatible with both ROM type and RAM type optical discs having high density and large capacity. An optical disc apparatus includes: a disc control device...
6327238 Optical disk device  
A beam is emitted from a radiation source such as a semiconductor laser and is converted to parallel light by a collimator lens. The light enters a surface A of a prism at an incidence angle φ (an...
6324150 Optical pickup head using multiple laser sources  
An optical pickup head which utilizes two or three laser beams of different wavelengths for reading or writing data on different kinds of optical recording media through a same optical output path...
6317400 Optical pickup apparatus  
An optical pickup apparatus is provided with: a light source (20) for emitting a light beam; an optical system (21, 22, 24, 25, 26, 27), which comprises an optical element (24) having an incident...
6084841 Optical pickup device having heat radiating mechanism  
An optical pickup device includes at least four light-receiving-surface elements, at least two semiconductor lasers, and an optical system for irradiating a light beam onto an optical recording...
6081498 Optical pickup compatible with recordable compact disk and digital video disk using plane parallel plates  
An optical pickup is compatible with at least two types of optical recording media each using light beams having different wavelengths from one another and which are used for recording and...
6014361 Beam expander to change an elliptical light beam emitted from a laser source to a circular light beam  
An optical head device of the present invention includes: a semiconductor laser for emitting a light beam; a first optical element for converting the light beam emitted from the semiconductor laser...
6014359 Optical head with a polarizing diffractive element  
Disclosed is an optical head, which has: a light generator which emits linearly polarized light; a lens which converges the light emitted from the light generator on a medium; a light detector...
5982733 Optical head  
An optical head emits a plurality of light beams onto an information record medium to perform a recording operation and/or a reproducing operation. The optical head is provided with: a plurality of...
5956312 Pickup apparatus and method for laser beams having different wavelengths  
There is provided an optical pick-up apparatus including (a) a plurality of light emitting devices emitting laser beams having different wavelengths, (b) inclined reflective surfaces by the same...
5946137 Optical information processing unit  
In the system of an optical head which conducts recording, reproducing and erasing, etc. on an optical disk by an optical means, the light from an optical disk is guided to photosensors through a...
5933401 Optical pickup having plural optical sources and plural optical detectors  
An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined...
5923632 Optical pick-up device for a multi-layer recording medium with a photodetector arrangement for focusing and tracking control  
An optical pick-up device invention is adapted according to the present invention to reproduce an information signal recorded on a multi-layer optical disc having a plurality of information signal...
5905708 Focusing two polarized beams onto different information carrier layers of a single optical disc  
A device for reading from or writing to an optical recording medium is disclosed which has at least two information carrier layers spaced apart from one another, as well as a light source, an...
5892749 Optical head device for reading two optical disks  
An optical head reader includes a laser light source; a polarization beam splitter for dividing first and second linearly polarized beams having first and second polarization directions which are...
5881043 Optical pickup with a first detector to receive reflected data component signal and a second detector to receive reflected other component signal  
An optical pickup irradiates a record surface of an optical storage medium with light and receives the light reflected by the record surface. The reflected light includes a data signal light...
5790502 Optical pickup with conversion of diffusion angle of outgoing light relative to diffusion angle of incident light  
In an optical pickup, light, emitted from a light-emitting element, is transmitted through a first beam splitter film with polarization selectivity, and a zero-order diffraction beam and two (±)...
5790501 Information reproducing device  
A laser beam emitted from a laser diode passes through a polarizing separating plane of a first polarization beam splitter and forms a beam spot on a magneto-optic disk. The plane of polarization...
5787058 Optical pickup apparatus utilizing a polygonal prism  
Disclosed is an optical pickup apparatus being manufactured with ease and utilizing the intensity of a laser beam effectively. The optical pickup apparatus comprises a polygonal prism having an...
5777975 Optical pickup incorporating an integrated optical guide member  
A light source beam is incident on an optical guide block and converted in its diffusion angle by a diffusion angle conversion film on a second inclined portion of the optical guide block, and...
Matches 1 - 50 out of 121 1 2 3 >