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7391701 Methods and systems for in-track optical positioning  
Methods and systems for formatting of optical media used for data or information storage.
7388815 Wiring layout structure for optical head device  
A fixture plate is fixed by a screw onto an optical housing of the optical head device at a portion corresponding to where a monitor signal path portion and an act signal path portion are arranged...
7379405 Method and optical disk drive for promptly protecting voice coil motor thereof from over current  
The invention is disclosed a method for promptly protecting a voice coil motor in an optical disk drive. A step (A) allows a data signal processor (DSP) to execute a protect module of the voice...
7376063 Control circuit of optical storage device and method thereof  
A control circuit of an optical storage device includes a loop phase calculation unit for calculating a closed loop phase of a servo system according to at least one error signal of the servo...
7369335 Optical pickup actuator  
An optical pickup actuator includes a bobbin, support members, and a pair of magnetic circuits. An objective lens is mounted on the bobbin. The support members have first ends fixed on sides of the...
7342867 Optical head device, optical recording device, and optical recording method  
An object of the present invention is to acquire optimum recording characteristics of an optical recoding medium having multiple data layers, with respect to each of the multiple data layers...
7342853 Optical disc system and method for managing shock during data record/play  
An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying...
7342849 Recording and/or playback device  
A disk recorder/player ( 1 ) including a skew adjusting means of a thin design is provided which includes a base ( 101 ), a disk rotation driving mechanism ( 102 ) for an optical disk ( 4 ), an...
7307940 Optical pick-up device  
It is an object of the present invention to provide an optical pick-up device capable of being miniaturized by reducing the number of components. The present invention provides an optical pick-up...
7304915 Actuator for optical disk system and apparatus for providing signal for driving the actuator  
An actuator of an optical disk system and an apparatus producing a signal for driving the actuator, the actuator including a light source, with which information is recorded on or reproduced from...
7295495 XY platform device with nanoscale precision  
The present invention discloses an XY platform device with nanoscale precision including an optical pickup head for focusing and seeking the tracks of an optical data storage medium; a servo device...
7283440 Tracking error signal detecting method selectively using a push-pull method, an improved push-pull method, and a three beam method and optical recording/reproducing apparatus using the same  
An optical recording/reproducing apparatus includes an optical pickup and a signal processor. The optical pickup includes an optical splitting device which splits light emitted from a first light...
7283432 Method and device for correcting optical path deviation of an optical pickup in an optical recording system  
A device for correcting optical path deviation of an optical pickup in an optical recording system includes a push-pull signal generator for generating a push-pull signal while the optical pickup...
7254098 CD-DVD compatible optical pickup and optical recording and/or reproducing apparatus using the same  
A CD-DVD compatible optical pickup in which both on-axis and off-axis light form a circular light spot on a recording surface of an optical recording medium, and an optical recording and/or...
7254097 Optical disc apparatus  
An optical pickup of an optical disc apparatus has a lens holder for holding an objective lens is pivoted with a guide shaft slidably in a direction in parallel with an optical axis of the...
7221523 Optical pickup and optical disk device  
The present invention is directed to an optical pick-up adapted for moving an object lens ( 7 ) supported by a lens holder ( 2 ) in a focus direction in parallel to the optical axis direction...
7190642 Focus servo device  
A focus servo device is for focusing a light irradiated from a light source onto a recording medium surface via an objective lens. Assuming that a wavelength of the light is λ, a numerical...
7177240 Optical disc system and method for controlling movement of an optical pickup to an innermost perimeter of an optical disc using track information  
Optical disc systems and methods for controlling movement of an optical pickup to an innermost perimeter of an optical disc using track information are provided. For example, an optical disc system...
7170609 Sensor systems and methods for quantification of physical parameters, chemical and biochemical volatile and nonvolatile compounds in fluids  
A system and method employing optical disc drives for quantitative analysis of physical, chemical and biochemical parameters are provided. The system including a disc drive for supporting and...
7145848 Optical disk apparatus using tilt and aberration correction control system  
A tilt control apparatus includes an orthogonal shift detector ( 9 ) which detects an orthogonal shift by comparing a pair of a plurality of tap coefficients (C 1 , . . . , C 7 ) of a FIR filter...
7145842 Objective lens moving control method and apparatus  
In a layer jump, a control signal based on a focus error signal is masked in a period based on a moving speed of an objective lens so as not to be influenced by an unnecessary light component....
7136339 Positioning control apparatus and method capable of reducing relative position error without increasing gain and frequency band of transfer characteristics of control system  
A positioning control apparatus for controlling a moving member to trace the position of a target member which almost equally repeats the position shift at a predetermined period comprises a...
7136330 Optical disc apparatus for recording and/or reproducing information on/from an information surface of a rotatable optical disc  
An optical disc apparatus ( 1 ) for recording and/or reproducing information on/from an information surface ( 3 ) of a rotatable optical disc ( 5 ), includes a supporting assembly ( 7 ), a spindle...
7099242 Disk drive, disk drive controlling method and disk drive controlling program  
A disk drive determines whether or not a currently loaded disk is a gravity center deviated disk based on a tracking error signal detected at different disk rotation speeds.
7099241 Apparatus for scanning optical recording media  
An apparatus for reading and/or writing data markings of an optical recording medium having data markings arranged along a track and header markings arranged laterally offset with respect to the...
7079329 Micro actuator for controlling focal depth  
A micro actuator for controlling a focal depth includes: a lens for forming a focal point by focusing light coming from a light source; a lens mounting unit having a lens mounted therein and...
7061594 Disc drive system and methods for use with bio-discs  
An optical disc drive for reading encoded information, such as on a CD, CD-R, or DVD, is modified to read biological or chemical investigational features from a disc. The modifications can include...
7057982 Servo error detector for optical disk  
A servo error detector usable in an optical disk system is provided. An envelope detecting unit ( 24 ) detects the top envelopes and bottom envelopes of RF signals SA–SH, and top envelope signals...
7053394 Recording device of master disk for information recording medium  
Two light beams are incident on the same position on a surface of an object ( 105 ) to be measured obliquely from upper sides facing each other, and positions at which the reflecting light beams...
7031233 Optical recording/reproduction device and focal point control method  
An optical recording/playback apparatus of the present invention achieves proper focus control on a target recording layer of a single-layer disk or a multilayer disk. When the focus control is...
7012858 Method for checking the existence of an optical disk using a focusing signal  
A method for checking the existence of an optical disk using a focusing signal is provided. The method in accordance with the present invention prevents misjudgement of the existence of an optical...
7009791 Position detecting method, information recording/reproducing device and information recording medium  
A position information signal pattern is recorded into a recording medium. The position information signal pattern is configured by arranging graphics having a circular shape, a rectangular shape...
6985424 Laser module and optical head  
An optical head in which a plurality of semiconductor laser chips are adhered on a mount surface perpendicular to the tracking servo direction of a focusing lens. Fluctuation of an optical spot...
6980504 Diffractive optical element with a pair of opposite surfaces projecting light on a photodetector  
An optical pickup device is adapted to read information signals from optical recording media of two different types such as a “DVD” and a “CD” for which two light beams with different...
6963520 Method of recording and reproducing an optical recording medium  
A method of recording and reproducing an optical recording medium which detects a defocus and a tilt of the optical recording medium and compensates the detected defocus and tilt in a high-density...
6958966 Control device for optical disk player that corrects rotational frequency data based on input data  
An optical disc player having an optical pickup records and retrieves information on an optical disc while the optical disc is rotating. A rotation pulse is generated each time the optical disc...
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...
6894955 Quick access information read and write devices  
There are provided an information write device and an information read device enabling to generate highly accurate contrast signals. When a main light spot Pc is located at the center of the a...
6888951 Methods and apparatus for analyzing operational and analyte data acquired from optical disc  
Methods and apparatus for analyzing nonoperational data acquired from optical discs, and in particular, trackable optical discs having concurrently readable nonoperational structures are provided....
6882605 FOCUSING METHOD, METHOD OF DETECTING FOCAL POINT DEVIATION, METHOD OF FORMING MASTER OF DATA STORAGE MEDIUM, FOCUSING CONTROL UNIT, UNIT FOR DETECTING FOCAL POINT DEVIATION, AND UNIT FOR FORMING MASTER OF DATA STORAGE MEDIUM  
Focusing control for maintaining a distance between an objective lens and a recording medium constant is executed using light whose wavelength is longer than that of recording light and whose...
6859334 Reflecting microoptical system  
A reflecting microoptical system is formed of only two optical surfaces having a continuous configuration, and has a simple configuration suitable for glass molding. Different combinations of...
6845415 Computing system capable of controlling disk loading and disk unloading operations of an optical disk drive  
A computing system is adapted for use with an optical disk drive, and includes a motherboard and a control key. The motherboard is adapted to be coupled electrically to the optical disk drive. The...
6819636 Optical disc device  
In an optical disc device that selectively implements a tracking servo and a spot position servo, a discontinuation cancellation unit is provided so that, when switching from the tracking servo to...
6801482 Information record/reproduction unit and method thereof  
An information reproduction unit has a data read means with a pickup for intermittently reading data recorded on a storage medium, a write means for writing the data in a memory, and a reproduction...
6798819 Optical pickup apparatus and method of manufacturing the same  
A deflector deflects laser light emitted from a laser light emitting device. A lens driver moves an objective lens for conversing the laser light deflected by the deflector onto an optical...
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...
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...
6744705 Optical disc recording and reproducing apparatus  
An optical disc recording and reproducing apparatus is provided. The apparatus detects the level of a focus error signal output from an optical pickup and a peak of the focus error signal occurred...
6735005 Cartesian scanning system  
A Cartesian scanning system for scanning a surface of a sample. The scanning system includes a light source assembly configured to produce at least one collimated beam of light, a light sensing...
6731574 Focus servo controlling apparatus, information reproducing apparatus and information recording apparatus  
A focus servo control is performed by changing a condition of a focus servo loop from an open condition to a close condition in correspondence with a level of a reflection light signal, which is...
Matches 1 - 50 out of 352 1 2 3 4 5 6 7 8 >