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7391683 |
Apparatus and method for detecting tilt of disc
An apparatus and a method for reducing a lead-in time of a disc, on which data is always recorded, and detecting exactly a tilt of the disc. The apparatus includes a pickup, and a system...
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7388822 |
Liquid crystal lens element and optical head device
A liquid crystal lens element having a lens function is provided, which is small sized without having moving part, and which can stably carry out correction of spherical aberration containing a...
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7385905 |
Apparatus for reading from and/or writing to optical recording media
When an optical recording medium having a plurality of data layers is being read from and/or written to, the input beam experiences an aberration, inter alia in the top layers of the data layers....
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7382698 |
Optical information recording/reproducing apparatus having tilt correction mechanism and method therefor
An optical information recording/reproducing apparatus and are provided under a state where a focus servo is driven, a tracking error signal recorded on the recording medium or a sum signal of a...
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7382696 |
Optical pick-up device
The present invention provides an optical pick-up device capable of suppressing the inclination of a lens actuator in the jitter direction caused by the variation of the ambient temperature thereof...
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7376054 |
Disc reproduction device
The present invention provides a disk playback device comprising a control circuit 7 for determining an optimum value of offset for a focus error signal based on amplitude values of a tracking...
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7372795 |
Recording apparatus and method for generating an index file for a content file
Before each content file is recorded first to a recording medium, a flag indicating a recording state of a content file is generated corresponding to a physical area where an index file can be...
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7366069 |
Auto-adjusting system for an optical incident angle
An auto-adjusting system for an optical incident angle comprises a memory, a linear tilt calculation unit, a non-linear tilt calculation unit, a controller, and a tilt actuator. The memory is used...
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7362672 |
Method and apparatus for disc rotation control in an optical storage system based on detected extent of disc warping
An apparatus is provided for disc rotation control in an optical storage system, which is capable of generating a focusing error signal from light that was reflected by a loaded optical disc. The...
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7359294 |
Optical scanning device with tilt detection
This invention relates to an optical scanning device for scanning an optical record carrier and detecting a tilt characteristic of the optical record carrier during scanning. The device includes a...
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7355932 |
Optical disk device for detecting thickness errors of the transparent substrate
The invention detects the thickness error of the transparent substrate using a general focus error signal detection system employing the fact that the reflecting light from the optical disk causes...
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7352664 |
Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
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7349311 |
Method and apparatus for detecting radial tilt
A method of, and an apparatus for detecting a radial tilt of a disc. Phases of summed signals obtained from signals that external light-receiving units of an octant photo diode receive are compared...
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7345967 |
Optical pickup unit
An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam...
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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...
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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...
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7339860 |
Displacement measurement
Laser light is irradiated from a lateral side of an optical disk ( 2 ) set in place to a peripheral side face of the optical disk ( 2 ), return light from the peripheral side face irradiated with...
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7336571 |
Method and arrangement for compensating scanning disturbances on optical recording media
The invention relates to a method and an arrangement for compensating scanning disturbances on optical recording media such as occur in a control loop of a playback or recording unit, in particular...
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7336570 |
Apparatus and method for adjusting the tilt angle of an optical pickup device
A disk drive apparatus for recording (writing) and/or reproducing (reading) information on an optical disk by rotating the optical disk, and adjusting the tilt angle of an optical pickup device...
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7327656 |
Tilt correction method detecting tilt with same linear velocity as upon actually recording/reproducing at each radial position
Prior to recording/reproducing information to/from an optical disk rotationally driven by a spindle motor, an optical pickup is moved to a plurality of measuring positions set beforehand in a...
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7327644 |
Optical pickup and disc drive apparatus
In order to simplify operation control and achieve smaller-sized apparatuses, the present invention provides an object lens drive apparatus having a fixed block, a movable block holding an...
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7327643 |
Radial tilt compensating optical disk apparatus using tracking control loop gain
In an optical disk apparatus for focusing a light beam on a track of an optical disk by using a tracking control loop to perform at least one of recording and reproducing operations upon the...
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7324414 |
Apparatus and method of optical disk recording while detecting vibration
According to the present invention, it is intended that the recording can be executed normally even against small vibrations to which a servo error signal detecting circuit cannot respond. A...
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7324413 |
Optical disc device
An optical disc device of the present invention has a carriage opposed to an optical disc medium and capable of moving in a radial direction of the optical disc medium; a first driving section for...
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7319648 |
Apparatus and method for reproducing record for optical recording medium
The method for reproducing records for the optical recording medium detects and compensates for detrack, tilt and defocus, having advantages in that: (1) the magnitude and the direction of detrack,...
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7319646 |
Focus operation for an optical disk device
A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the...
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7319643 |
Method for detecting servo error, apparatus therefor, disk which maintains quality of servo error signal, method of controlling servo of disk recording/reproducing apparatus, method of detecting tracking error, and method of detecting tilt error
An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal...
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7317672 |
Optical head
An optical head includes the following: a light beam separator ( 35 ) that includes substantial interference regions for light that is reflected from an information recording medium and travels in...
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7317671 |
Apparatus and method for compensating for tilt
An apparatus and a method of playing an optical recording medium, including a method of compensating for a tilt by a real time tilt detection before and during a playing operation of the optical...
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7317669 |
Method and apparatus for compensating for disc eccentricity in optical disc servo system
A method and apparatus compensating for disc eccentricity includes extracting eccentricity data from a tracking error signal having one period, generated by a tracking servo, detecting parameter...
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7315503 |
Optical pick-up device using micromirror array lens
An optical pick-up device comprising at least one micromirror array lens. The micromirror array lens enables focusing, tracking, and/or tilt compensation in the optical pick-up device without...
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7315499 |
Optical disk apparatus, tilt compensation method, program, and information recording medium
An optical disk apparatus includes a tilt detection unit detecting the tilt value of an optical disk medium with respect to an optical system. A tilt compensation unit compensates for the tilt of...
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7313059 |
Playback apparatus, method, and recording medium for defect period processing and post-defect period processing
A playback apparatus for reproducing data recorded on a disk medium by using an optical pickup, the playback apparatus comprising: RF signal generating means, data signal generating means, defect...
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7313058 |
Optical disk device and method for controlling optical disk
Tilt of an optical disk is detected and controlled by detecting a tilt zone border based on a zone correspondence table expressing a ZCLV zone of the optical disk and the tilt zone including a...
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7310295 |
Optical disk drive device and method for correcting tilt of optical pickup
A tilt sensor 23 is provided on a CD optical pickup 11 , and a sub-chassis 24 and a height adjustment mechanism 25 and the like are provided for adjusting the tilt of a DVD optical pickup ...
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7310289 |
Actuator for optical pickup of an optical disk drive and a method of using the same
An actuator and a method of operating an optical pickup of an optical disk drive comprises a blade on which an object lens is mounted, a plurality of magnets for generating a magnetic field, a...
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7307929 |
Method and apparatus for tilt correction and optical disk recorder/player using tilt correction technique
In a tilt correction method, first information about a specific inclination of an object lens is acquired in response to an access request to an information recording medium. The specific...
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7304920 |
Optical head that detects tilt in an optical disk
An optical head that detects a tilt in an optical disk. The optical head includes a condensing means, a light receiving means, a tracking error signal detection means, and an optical tilt detecting...
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7301872 |
Optical pickup and optical disc drive device
The present invention relates to an optical pickup and an optical disc drive that records or reproduces data signals on or from optical discs different in specifications, such as recording density...
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7301864 |
Objective lens, optical pick-up device, and optical disk device
To provide an optical pickup device and optical disk device capable of realizing at least one of thickness reduction, size reduction and suppression against characteristic deterioration even where...
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7301863 |
Method and device for canceling a land-groove offset component of a focusing error signal in an optical storage system
A device for canceling a land-groove offset component of a focusing error signal in an optical storage system includes first and second circuits, and an adder. The first circuit processes a radio...
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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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7301861 |
Coma aberration correcting apparatus for optical pickup
A coma aberration correcting apparatus of an optical pickup includes an optical pickup main body having a photo diode, and an actuator mounted on an objective lens focusing a beam emitted from the...
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7298674 |
Method and device for adjusting a control parameter of a servo of an optical drive
A method and a device for adjusting control parameters of a servo system of an optical disk drive. A first sinusoidal signal is introduced into a control loop of the servo system, while a band-pass...
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7295497 |
Optical disk device and tilt correction method thereof
There are provided an optical disk device and tilt correction processing method for performing recording/reproduction by rapidly acquiring an optimal tilt correction value for an optical disk...
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7289405 |
Apparatus and method for detecting optical disc type and/or adjusting track balance
Provided are an apparatus and method for detecting a type of an optical disc inserted into an optical disc system and/or adjusting a track balance in the optical disc system by detecting voltages...
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7289400 |
Optical disc drive having a movable aberration correcting lens
An optical disc drive includes an optical head having a stationary portion and a movable portion. The movable portion supports an objective lens for converging a beam emitted from the stationary...
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7286450 |
Light pickup device with center axis and light balancing adjustment
A light pickup device includes a light projection optical system comprising a light source which emits light, and an objective lens which condenses the light on an optical disk, a light detection...
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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...
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7283437 |
Device and method for compensating for tilt in an optical disk apparatus
A tilt compensating device and method of performing normal tilt compensation in the event of a servo emergency which may occur during reproduction of data from an optical recording medium are...
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