Matches 1 - 50 out of 191 1 2 3 4 >
Match Document Document Title
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...
7345982 Optical pickup device, optical disk drive, optical device and composite optical element  
An optical pickup device is provided which includes a double-wavelength objective lens ( 34 ) that collects a light beam selectively emitted from a light-emitting/-detecting element ( 31 ) that...
7336587 Optical pickup head compatible with multiple optical recording media  
An optical pickup head compatible with multiple optical recording media includes three light sources, a prism unit disposed beside the light sources, a reflective multi-surface prism disposed...
7321542 Beam shaping prism and optical pickup employing the same  
A beam shaping prism used in an optical pickup, the beam shaping prism includes a first prism having an incident surface and a second prism having an inclined surface. Since a beam entering the...
7289416 Optical pickup and optical disk apparatus  
An optical pickup for performing data recording and reproduction with respect to both CDs and DVDs and a disk apparatus incorporating the optical pickup. The optical pickup comprises a CD laser...
7280459 Device for correcting signal modulations  
A device for reading from and/or writing to optical recording media 10, on which information is present in the form of pits, with a linearly polarized light beam 2. A device for reading from...
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...
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...
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...
7239599 Light irradiation head and information storage apparatus  
A light irradiation head of the present invention includes: a propagation body having a tapered two dimensional shape axially symmetrical to a predetermined symmetrical axis, and consisting of a...
7239597 Lens for optical recording and reproducing system  
A lens for an optical recording and reproducing system includes: a plane of incidence on which a light generated from a light source is made incident; a first reflection side for reflecting a light...
7239594 Self-referenced holography using element formed on a holographic medium  
The invention is directed to self-referenced holographic recording techniques that make use of an element of a holographic medium to create a reference beam from a zero frequency Fourier component...
7233564 Optical disk apparatus  
An optical disk apparatus which records/reproduces data on/from a plurality of types of optical disks. The optical disk apparatus has a plurality of laser diodes. Two laser light rays emanating...
7177260 Optical pickup including a many-sided reflection prism and method of using the optical pickup  
An optical pickup including a many-sided reflection prism formed as a single body with a plurality of reflection faces to guide a light beam incident through a transmission face in a horizontal...
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,...
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...
7145844 Optical head with adjustable beam shaping element  
An optical head by which a good detection signal can be obtained based on a zeroth-order diffracted beam and first-order diffracted beams is provided. The optical head includes: a shaping element...
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...
7113459 Optical device, information recording/reproducing apparatus using the optical device  
An optical device and an information recording/reproducing apparatus using the optical device are disclosed. Incident light is output to a path selected from a plurality of paths so that an optical...
7099254 Optical scanning device  
An optical scanning device for scanning an optical record carrier includes a radiation source and a beam splitter arranged to pass a first portion of the source beam to the record carrier, and a...
7092345 Optical module  
An optical module has a first light source which emits a first light beam from a first light emission point in a predetermined direction, a second light source which emits a second light beam from...
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...
7088659 Optical disk apparatus and tilt detection method  
An optical disk apparatus includes a laser diode, and a light from the laser diode becomes a parallel light by a collimator lens, which is reflected toward an object lens by a reflection mirror....
7088645 Optical pickup apparatus compatible with different types of optical recording mediums  
A polarizing beam splitter for separating an upstream beam from a downstream beam according to the polarization of an incident beam is provided between first and second light sources emitting laser...
7085220 Optical head and optical device for enhancing the intensity of a transmitted light  
A optical device including conductive films having a first and second surfaces, one hole, surface specific shapes periodically, and a layer inserted as an intermediate layer between the first and...
7050381 Optical system having a convex surface for accessing a storage medium  
An optical system for accessing a storage medium. The system combines two kinds of laser diode, abandons some unnecessary optical elements used in the prior art, and further uses a Penta prism to...
7023787 Optical pickup device  
An optical pickup device has a first combination reception and emission device ( 1 ) which emits laser beams ( 10 ) to an optical disk, and a second combination reception and emission device ( 2 )...
7009916 Optical pickup device  
An optical pickup device including a lead frame and a board attached to the lead frame is provided. The lead frame includes optical components, such as a laser diode and an optical element, which...
6980505 Optical head apparatus including two light sources and one photodetector  
In an optical head apparatus including a first light source for emitting a first light beam having a first wavelength, a second light source for emitting a second light beam having a second...
6972982 Ring-shaped prism of a holographic ROM system  
A holographic system for storing data on an interference pattern in a hologram storage medium includes a light source for emitting a laser beam, a beam splitter, modulating means and a refractive...
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...
6947367 Single means for converting beam widths of plural laser beams with different entry and exit angle with offset  
A low-profile optical disk device which performs recording and reproducing using a plurality of laser light sources with different wavelengths, without thug need for additional components. It is...
6940803 Optical head, recording and reproducing apparatus and solid immersion lens  
A recording and reproducing apparatus has an optical head that is provided with a laser light source for emitting light and a reflection converging optical system. The reflection converging optical...
6934239 Light source for optical head  
A light source unit, which is employed in an optical head for an optical disc drive, is provided with a laser diode having a plurality of light emitting points. The plurality of light emitting...
6930975 Optical irradiation head and information recording/reproducing device  
An optical irradiation head including a trapezoidal prism having a pair of trapezoidal principal surfaces parallel to each other, a rectangular bottom surface, a rectangular top surface parallel to...
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...
6873592 Slim optical pickup apparatus  
A slim optical pickup apparatus which records/reads information from a recording medium includes a light source, an objective lens which focuses a beam incident from the light source on the...
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...
6845077 Optical pick-up device with convergent light diffraction for recording/reading information on optical recording medium  
An optical pick-up device for recording/reading an optical recording medium is provided, which can efficiently utilize light emitted from the laser light source. The optical pick-up device includes...
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...
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...
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...
6724711 Apparatuses and methods for directing light beams in an optical recording system  
A rotatable optical wedge rotatable between a first position and a second position in an optical recording system directs a light beam to a position on a recording medium. The position of the...
6688758 Line generator optical apparatus  
An apparatus for generating linear patterns of light comprises a light source emitting a first light beam. An anamorphic system is positioned downstream of the light source and is adapted to...
6654320 Optical pickup apparatus  
A small-sized, inexpensive optical pickup apparatus can be assembled with high accuracy. The optical pickup apparatus has a various-purpose semiconductor laser, an integrated optical assembly for...
6631227 Information recording and reproducing apparatus  
An information recording and reproducing apparatus for at least one of recording and reproducing information on a recording medium utilizing near-field light has a suspension arm and a near-field...
6631113 Continuous flexible connection method for miniature optical head  
An optical pickup assembly includes an optical pickup unit (OPU) and a flex circuit. The OPU is mounted atop a thermally conductive plate through a cutout of the flex circuit. Bond wires couple...
6614720 Optical pickup device  
Beam shaping means may have a shaping ratio set to allow a light beam emitted from a semiconductor laser and having an elliptic intensity distribution to have an ellipticity of no more than two to...
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...
6584060 Optical pick-up device for recording/reading information on optical recording medium  
An optical pick-up device for recording/reading an optical recording medium is provided, which can efficiently utilize light emitted from the laser light source. The optical pick-up device includes...
Matches 1 - 50 out of 191 1 2 3 4 >