Matches 51 - 100 out of 481 < 1 2 3 4 5 6 7 8 9 10 >
Match Document Document Title
5625464 Continuous television transmission reproduction and playback  
A receiver/recorder of television transmissions is disclosed which operates automatically on a stand-by basis to record continuously television transmissions from at least one channel onto a...
5623478 Apparatus for reproducing an optical recording medium having first and second pit strings on opposite sides of each track  
There is provided an optical recording medium including a first pit string having a succession of pits and mirror surface sections, which first pit string is formed on one side of a track center as...
5619387 Disk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patterns  
A disk drive stores multimedia data in long spiral data tracks. The tracks on opposite surfaces of the disk spiral in opposite directions, so that a track on one surface can be read as the actuator...
5617389 Method of reproducing information of optical disc, method of recording and reproducing the same, apparatus for reproducing the same, and light detecting apparatus used in the reproducing apparatus  
An optical disc has a recording surface on which a spiral track having a predetermined track pitch is formed. A plurality of information units are formed on the track each of which has a...
5606545 Reproducing apparatus having a detector for simultaneously scanning adjacent tracks of an optical recording medium  
An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording...
5600623 Disc device having a plurality of heads each movable within a limited distance  
A disc device accommodates a disc rotatably mounted therein, a plurality of first heads movable in a first direction radially of the disc, and a plurality of second heads movable in a second...
5581534 Device for realizing a longitudinal pattern of substantially parallel tracks in a record carrier which controls movement of the record carrier on the basis of trackpitch  
An optical scanning device for realizing in a recording layer of an optical tape a longitudinal path (i.e. pattern) of substantially parallel tracks. The device includes an optical system for...
5557602 Optical recording medium, recording and reproducing method and tracking error generating method  
An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording...
5513161 Optical recording medium, recording and reproducing method and tracking error generating method  
An optical recording medium on which information data is to be recorded and on which an n-th recording track is located at a distance from the (n-1)th recording track preceding the n-th recording...
5499229 Track scanning for reproducing address information by crosstalk  
On an optical disk, information is recorded on both grooves and lands as guide tracks for guiding a light beam. The width of each groove and that of each land are set substantially equal to each...
5495463 Controller and control method of laser power for recording information in an optical record medium  
In a laser power controller, a part of laser beam emitted from a laser diode 1 is detected with a photodetector 2. The operational processor 3 controls a driver 5 so that the light-emitting power...
5495460 Optical disk and apparatus for reproducing signal without crosstalk  
An optical disc includes a signal recording track spirally formed on the surface of the optical disc, information pits formed on the signal recording track, and a plurality of non-signal regions...
5485441 Method of optically reading information, optical pickup apparatus and optical reproducing apparatus  
A method of optically reproducing information from an optical recording medium on which concave or convex signal pits are formed, is provided with the steps of: irradiating each of pit edge...
5485438 Method and apparatus for optically recording and/or reproducing information  
Disclosed is an optical information recording and/or reproducing system for recording or reproducing information in parallel from a first point towards a second point in which at least (N+1)...
5483508 Optical recording and reproducing apparatus using a hologram to detect and judge a plurality of pit patterns  
An optical recording and reproducing apparatus records two rows of a plurality of pit patterns with respect to one track by modulating two light beams and by converging the modulated two light...
5469418 Optical information write/read device and method for writing data  
A write/read device includes two optical heads for writing data on an optical disk. The two heads are moved simultaneously after data is written in a track, the written data is read and checked for...
5459709 System for recording digital information in a pulse-length modulation format  
An improved system for recording and playing back digital information in a special pulse-length modulation format on a disc-shaped record. The digital information is stored in a succession of...
5446724 Information storage medium with first and second recording regions each having a predetermined recording density  
A recording medium is provided for use with a device for recording data on and reading data from the recording medium using first and second recording and reading methods. A first recording region...
5446723 Multiple data surface optical data storage system  
An optical data storage system comprises a multiple data surface medium and optical head. The medium comprises a plurality of substrates separated by a light transmissive medium. Data surfaces are...
5420847 Reproducing system for an optical disc  
A plurality of tracks are spirally arranged in a group on an optical disc. The tracks in the group are simultaneously radiated by laser beams. Adjacent tracks in the group are disposed at a radial...
5418774 Optical head system and its optical disc  
An optical head system designed to accomplish an information recording and/or reproduction from opposite disc surfaces of an optical disc with the use of a single light source. The optical head...
5412635 Optical disk with signal pit recording format, method of recording same and optical pickup  
An optical disk includes a recording medium having a disk shape, and a plurality of signal pit strings formed on the recording medium and arranged in a circumferential direction of the optical...
5394387 Information recording/reproducing method  
An information recording/reproducing method in which a recording area is divided into a plurality of zones in the radial direction of a disk so that the lengths of recording pits become the same in...
5386410 Optical recording medium and recording and reproducing apparatus of the same  
A recording and reproducing apparatus of an optical recording medium has a plurality of light sources. A plurality of light beams are radiated by a laser diode array to a track of the optical...
5373500 Optical readable carrier with diffractive tracks containing information bearing irregularity  
The present invention concerns an arrangement for reading an optically readable carrier having a substrate with diffractive tracks with respective longitudinal axes and formed of a succession of...
5323380 Information recording disc and system  
An information recording disc having at least two bands of information provided thereon. Each of the bands contain at least one track with one of the at least two bands being a read-only area band...
5319625 Apparatus using demodulators to detect crosstalk from a signal read from a recording medium  
This invention relates to a crosstalk detecting apparatus for detecting crosstalk which can occur when an image signal FM-modulated and recorded on a recording medium is read. The crosstalk...
5313449 Optical recording medium and method of optically playing back same including recording medium structure operating as optical resonators emitting applied pumping light at a variable frequency  
An optical recording medium, typically an optical disc, has a recording region of a laser medium extending thicknesswise thereof, and a reference region positioned radially inwardly of the...
5313446 Disc drive device having a head carriage  
A disc drive device has a head mounted on a head carriage with a head moving support mechanism which is capable of moving the head to the extent of one track pitch. The device is arranged to...
5303215 Self-timing optic lathe  
A self-timing optic lathe, comprising a turntable for rotating an object disc, an offset code track carried by the turntable and embodying an encoded control signal, a read laser for optically...
5295127 Optical data recorder with segment synchronization marks  
The beginning of a segment within a track of a record carrier, having a plurality of frames in each segment, is identified by detecting the presence of a control mark at a given position near the...
5270997 Optical head with reduced aberration  
An optical head device for recording and/or reproducing information by using an optical recording medium includes a light source, an objective lens, a photo detector, an optical system including a...
5247507 Optical scanning system for a sinusoidal data track  
An optical scanning system for a compact disc having a sinusoidal data track radially meandering, at a selected frequency, about the axis of rotation of the disc includes a first laser beam for...
5233583 Tracking and reading system for an optical medium and medium for use therewith  
An optical disk includes a spiraling guide track embedded in a surface of the disk on either side of which is positioned a different information track. Apparatus for both tracking and reading the...
5228021 Multidisk player including a display that indicates titles and kinds of disks within the player  
A display apparatus for a multidisk player including a memory for storing data of titles and disk kinds for a plurality of disks, and a controller for reading all the stored data and displaying the...
5226031 Method of reproducing information by optically scanning marks on a recording medium with compensation for noise components caused by marks adjacent a mark being scanned  
A method of reproducing optical information by utilizing an optical information recording medium is disclosed, in which a timing mark is formed on each information track in the recording medium; an...
5218594 Recording medium with an optical waveguide and player for playing the same  
An optical waveguide recording medium has optical waveguides on which minute refractive-index discontinuous portions for generating multiple reflected waveguide lights of different amplitudes and...
5216658 Enlarged-spot erasure of optical media in dual-beam systems  
An apparatus and method for erasing data from optical media in dual beam systems. The erase spot is focused to have a diameter equal to three times the track pitch of the medium. The larger erase...
5202865 Track access control apparatus for optical disk apparatus  
A track access control method and apparatus for an optical disk apparatus are disclosed. Where a locus of movement of an object lens through which a write beam and a read beam are projected onto an...
5189658 Device for recording information on an optical data carrier  
A known film becomes transparent when heated from a first temperature (for example, room temperature) to a second temperature and non-transparent when heated to a third temperature. These changes...
5182743 Optical disk arrangement with diffractive tracks allowing positional control  
The present invention concerns an arrangement for reading an optically readable light reflective carrier on which data is stored in form of diffractive elements which are deviations from a...
5182740 Method and apparatus for correctly storing data recorded on a rotational disc-shaped recording medium despite occurrence of clock synchronization disorder  
This invention is intended for MCAV-based information processing which records and/or reproduces data. A disc-shaped recording medium having a record area formed in a plurality of concentric tracks...
5175725 Optical disk arrangement with closed contours whose entire extent represents information  
The present invention concerns an arrangement for reading an optically readable light reflective carrier on which data is stored in the form of diffractive elements which are deviations from a...
5170385 Recording medium with unembossed area indicating sector divisions  
A recording medium in which one sector is divided into a plurality of segments and information is recorded in the segments, uses a reproducing method in which information is reproduced optically...
5157650 Optical recording apparatus  
An optical recording apparatus employing a plurality of modulated laser beams as means for recording information on an optical recording medium, comprising a laser beam source which emits a laser...
5153870 Rotary head actuator for optical disk  
A rotary actuator for an optical head comprises a pair of reflectors mounted respectively on the end of the arm and on the pivot axis to define an optical path via the arm to an optical disk for an...
5153869 Apparatus for recording information on an optical disk with a modified constant linear density system  
An information recording apparatus includes a rotating section for rotating an optical disk at a constant angular velocity, the disk including a spiral recording track or concentric recording...
5150339 Optical disk medium and its application method and system  
In the present invention, there is provided an optical disk medium wherein a ROM region having data already recorded therein and capable of only optically reproducing (reading) the data as well as...
5144552 Optical information storage medium having grooves and pits with specific depths, respectively  
An optical information storage medium is used for recording optical information therein and reproducing optical information therefrom. The optical information storage medium includes parallel,...
5136574 Optical card and a recording/reproduction apparatus for the same  
An apparatus for recording and reproducing information using an optical card comprising a memory region in which one pit train for supplying a track servo signal and a synchronizing signal is...
Matches 51 - 100 out of 481 < 1 2 3 4 5 6 7 8 9 10 >