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7378627 |
Semiconductor light receiving element and optical pick-up device having the semiconductor light receiving element
A semiconductor light receiving element has: a semiconductor substrate; a plurality of photodiodes formed on the semiconductor substrate and configured to receive respective lights of different...
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7358471 |
Optical head device
An optical head device includes a light source which emits a light beam, an objective lens which condenses the light beam on the optical disk, a condensing lens which condenses reflected light from...
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7358470 |
Optical pickup
An optical pickup with a reflective coating device is provided, including a laser diode (LD), an optical element, and a photo detector integrated circuit (PDIC). The LD emits 1-3 lights with...
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7348548 |
Image forming apparatus and image forming method
A printer has a laser emitter for emitting a laser beam to irradiate a surface of a photosensitive member; a reflector, disposed at a position on a laser beam path defined by the laser emitter and...
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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...
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7345266 |
Optical medium judging method for avoiding the collision of an objective lens with a disk
The present invention relates to an optical medium judging method for avoiding the collision of an objective lens with a disk or the failure to judge a warped disk when the optical disk drive...
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7319221 |
Light-receiving device, optical pickup, and optical disc apparatus
A signal-detecting light-receiving device formed as an integrated circuit, which receives a light beam reflected from an optical recording medium, and which outputs a signal obtained from the...
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7301862 |
Optical disc drive having tilt controlled objective lens and optical disc
An optical disc drive includes an objective lens for focusing light on an optical disc with five or more stacked data storage layers and a tilt control mechanism for controlling a tilt angle...
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7282684 |
Optical pickup apparatus
An optical pickup apparatus is provided with a light source device to emit selectively an ordinary polarized light ray and an extraordinary polarized light ray by controlling a polarization...
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7276680 |
Control unit and optical disk drive including the control unit
An information processing apparatus includes: a converging section for converging light; a shifting section for shifting the focus of the light by moving the converging section perpendicularly to...
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7251087 |
Lens driving apparatus and image pick-up apparatus including the same
An image entering from the left side of the figure passes through a correcting lens unit, and forms an image on an image pickup device on the right side of the figure. The correcting lens unit...
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7247827 |
System for measurement of the height, angle and their variations of the surface of an object
A system for measurement of the height, angle and their variations of the surface of an object comprises a measurement module and an astigmatic optical path mechanism. The optical path mechanism...
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7247826 |
Optical pickup apparatus
An optical path coupling member aligns an optical axis directed to a light condensing member of the first wavelength light having a shortest wavelength with that of the third wavelength light...
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7223952 |
Optical sensing head and method for fabricating the sensing head
An optical sensing head, which is for reading out an optical data memory, has a substrate with a main surface. An edge-emitting laser component is configured on the main surface of the substrate...
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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...
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7199343 |
Spatial optical memory
A device for storing photons between one and a plurality of reflected surfaces, and the storage of information, in particular in the form of digital data, being provided by creating at least one...
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7177246 |
Optical disk drive focusing apparatus using sum signal
A system provides a signal to an actuator within an optical pickup unit of an optical disk drive. In one implementation, SUM signal data (an output from the quad sensors typically present in the...
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7164624 |
Optical scanning device
An optical scanning device ( 1 ) for scanning an information layer ( 2 ) includes a radiation source ( 6 ) for supplying a radiation beam ( 14 ), a lens system ( 7 ) having an optical axis (OO′),...
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7124441 |
Method and apparatus for securely associating an optically readable memory with a user machine
A CD-ROM has an obscurable section wherein exists a photosensitive mask material layer or constituent operative to alter the optical properties of areas subjected to prolonged exposure to the...
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7109462 |
Light beam output control apparatus, optical pickup apparatus, light beam emission control method and computer-readable recorded medium in which light beam emission control program is recorded
An optical pickup apparatus comprises a semiconductor laser output controller for emitting laser beam, a photodetector for detecting the emitted laser beam, a sampling processor for performing a...
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7102836 |
Objective lens driving apparatus for optical pickup
An objective lens driving apparatus for an optical pickup includes a blade on which an objective lens can be mounted, a plurality of elastic support members supporting the blade and capable of...
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7078674 |
Optical pickup device emitting linear polarized light with a 45 degree phase difference
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,...
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7067784 |
Programmable lens assemblies and optical systems incorporating them
An imaging system ( 10 ) has a fixed lens combination ( 22 ), a spatial light modulator (SLM) ( 20 ) and a linear detector array ( 12 ). A scene image is scanned across a simple array ( 12 ) in a...
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7064308 |
Method of and apparatus for adjusting the focus position of an optical pickup
It is an object of the present invention to adjust the focus position of an optical pickup. A brightness measuring apparatus having a half mirror and an objective lens focusing on the half mirror...
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7057146 |
Optical pickup having a diffraction grating and a hologram element
The optical pickup of this invention includes a diffraction grating for dividing a light beam emitted from a semiconductor laser into a main beam, a precedent sub beam and a subsequent sub beam; a...
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7042817 |
Aberration detection device, aberration detection method, and optical pick-up device for controlling spherical aberration
An aberration detection device which can detect a spherical aberration sensitively by separating a light beam appropriately so as to enlarge a difference in the positions where the respective...
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7020063 |
Optical pickup
An optical pickup comprising: a diffraction grating, a beam splitter and laser beam guiding optical components that change direction of laser beams, which are placed on a light path constituted by...
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7019280 |
Apparatus for detecting the tilt of a light reflector relative to the optical axis of input light
The object of the invention is to accurately detect the amount of tilt in the light reflector to the optical axis of an output light with a simple configuration. A tilt sensing apparatus includes a...
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7019273 |
Optical information recording employing improved recording power control scheme
A disk apparatus performs optical recording onto an optical disk with a record mark by using a light beam modulated in a manner of multi-pulse series, includes. A detection pulse generating part...
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6982405 |
System and method for using a photodiode to self-test an optical drive
A system and method for using a photodiode to self-test an optical drive is disclosed. An optical drive includes a light source that emits a light for interacting with optical media. A photodiode...
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6974939 |
Optical recording/reproducing apparatus for multi-layer recording media that alleviates adverse effect of spherical aberration beyond compensation by changing the numerical aperture of combined lenses
An optical recording/reproducing apparatus is intended for a recording medium having at least two information recording layers. The apparatus has at least two lenses, a first lens and a second...
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6963409 |
Optical position measuring device
An optical position measuring system including a periodic grating structure and a scanning unit. The scanning unit includes a light source that directs light towards the periodic grating structure...
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6956192 |
Optical head and optical disk drive
A DVD laser emits a first light beam, and a CD laser emits a second light beam. An optical diffraction element diffracts first and second reflected lights corresponding to the first and second...
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6946634 |
Optical pickup device
In an optical pickup device provided with an optical system for guiding and focusing three-beam laser light along a predetermined route onto a recording surface of an optical disk and guiding a...
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6946633 |
Optical disc apparatus and method for controlling focus of the same
A focus error signal which is a differential signal indicative of a difference between a sum of amounts of reflected light detected by photodetector elements A and C of a four-split photodetector,...
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6943335 |
Signal processing apparatus having a specific limb darkening correction
A signal processing apparatus includes a lens, an image sensing device placed on an imaging plane of the lens, and a limb darkening correction section which corrects limb darkening only in the...
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6927375 |
Optical element, optical head and optical information processor
A light beam reflected by an information medium is split by a diffraction optical system into first diffraction light and second diffraction light, which is not a complex conjugate wave of the...
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6867408 |
Erasable/rewritable optical data storage with photorefractive polymers
A method of erasable/rewritable optical data storage is provided in which a laser beam from a laser ( 10 ) operated in either a pulsed or continuous wave mode is focussed by an optical system (...
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6842652 |
Image capture device
An image capture device is provided, a portion of which is insertable into an expansion slot of a handheld PC or PDA device, which is configured like a camera familiar to the user. In one...
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6822210 |
Data recording apparatus including light intensity control device
A data recording apparatus includes a laser diode applying light to a recording medium to record data, a front monitor diode detecting the intensity of light emitted from the laser diode, a switch...
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6822209 |
Focal point dislocation detecting method and optical pickup apparatus
The focal point detection method detects focal point dislocation of a coupling objective lens in accordance with a light beam passing a 60% to 80% region of a light beam effective diameter, which...
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6806451 |
Media for enhanced optical auto-focus performance and methods for using same
A multi-layer imaging medium has a layer that absorbs radiation at a wavelength used by an optical auto-focus system. Spurious reflections are suppressed. The layer transmits radiation at a...
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6787748 |
High speed sampling circuit
A light intensity control apparatus for use in an information recording and reading system includes a light source driving device for driving a light source so as to generate a light having the...
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6781105 |
Optical information recording employing improved recording power control scheme
A disk apparatus performs optical recording onto an optical disk with a record mark by using a light beam modulated in a manner of multi-pulse series, includes. A detection pulse generating part...
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6781104 |
Device for scanning an optical record carrier
An optical scanning device scans a surface ( 23 ) provided with marks with a focused radiation beam ( 35 ) along a scan line. The device has a radiation-sensitive detection system ( 39 ) comprises...
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6777657 |
Focusing controller for focus jump control between recording layers of multilayer disk
A focusing controller executes an appropriate focus jump even in a multilayer disk having layers of characteristics greatly different from each other. The focusing controller has an optical pickup...
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6768091 |
Optical pick-up device with a light amount detecting device
An optical pick-up device includes a semi-conductor laser as a laser light-emitting device, a collimator lens, a directional control mirror, an objective lens, a light amount detecting device, a...
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6756575 |
Aberration detecting method, optical recording and reproduction method using thereof, and optical recording and reproduction apparatus
An aberration detecting method of the present invention is arranged such that a light beam, having passed through an optical convergence system provided in an optical pickup device, illuminates a...
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6756574 |
Focusing control apparatus and method for multi-layer optical recording medium
A focusing control apparatus includes method for an optical pickup having an objective lens and an aberration correcting unit includes the steps of detecting an amount of focus error of a light...
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6747257 |
Monolithic optical pickup and an assembly including the pickup with laser source(s) and optical detector(s)
A monolithic optical pickup has all passive optical elements aligned during fabrication, thereby requiring no alignment during the assembly of a system utilizing it. Its supporting structure is the...
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