摘要:
An optical disc recording and playback apparatus has a record/playback head adapted to write data into and read them out of information tracks formed on a rotatable optical disc. A carriage carrying the head therewith is driven by a linear motor in the radial direction of the disc perpendicular to the tracks, and then stopped and held at a desired track position. Thereafter, a tracking control is performed by allowing the head to move in the radial direction within a predetermined range.
摘要:
An optical disc player/recorder includes a composite coil device for controlling both tracking and focusing functions of a moveable objective lens unit. A bobbin having orthogonal coils is supported by spring members and holds the objective lens. A magnetic gap field intersects both coils and current through each controls the focusing position and tracking position of the lens.
摘要:
A moving-coil type motor according to the present invention is composed of a hollow moving coil to which electrical energy is to be applied, a magnetic circuit member made of a material having high permeability which consists of an inner portion disposed within the hollow part of said moving coil and an outer portion disposed outside the same coil, said inner and outer portions being interconnected at their rear ends, and a magnet installed on said magnetic circuit member. The foregoing moving coil is fixed to an arm member supported to be capable of oscillating around a shaft, is curved into a circular arc centering around said shaft, and has a square-shaped cross section. The magnetic circuit member is also curved into a circular arc centering around the foregoing shaft similar to the moving coil, and the shape of the cross section of both the inner portion and the outer portion thereof is square similar to the shape of cross section of the moving coil.
摘要:
An angularly rotatable mirror apparatus including angularly rotatable mirror means and linear motor means. The angularly rotatable mirror means includes a mirror supported on a bracket and connected through an arm to the linear motor means for angularly rotating the mirror including a magnetic circuit consisting of a permanent magnet, a center pole an outer yoke, and a gap defined between the center pole and the outer yoke, and a movable coil arranged in the gap and connected to the arm. Means is provided for effecting control of the operation of the linear motor means in such a manner that a light flux reflected by the mirror will move at a constant speed on a surface to be scanned by the light flux.
摘要:
An end plate is joined to a fuel cell stack. A first piping unit and a second piping unit are attached to the end plate. The first piping unit has a first attachment base, to which a fuel gas supply pipe, a first oxidation off-gas discharge pipe, and a coolant discharge pipe are coupled. The second piping unit has a second attachment base, to which an oxidation gas supply pipe, a coolant supply pipe, and a discharge pipe are coupled. The discharge pipe is joined to a discharge cylinder coupled to the first oxidation off-gas discharge pipe. The oxidation gas supply pipe and the coolant supply pipe are integrated with each other. Also, the first oxidation off-gas discharge pipe and the coolant discharge pipe are integrated with each other.
摘要:
A flexible and extensible architecture allows for secure searching across an enterprise. Such an architecture can provide a simple Internet-like search experience to users searching secure content inside (and outside) the enterprise. The architecture allows for the crawling and searching of a variety or sources across an enterprise, regardless of whether any of these sources conform to a conventional user role model. The architecture further allows for security attributes to be submitted at query time, for example, in order to provide real-time secure access to enterprise resources. The user query also can be transformed to provide for dynamic querying that provides for a more current result list than can be obtained for static queries.
摘要:
A belt drive controller for controlling each belt stopping position with high accuracy during intermittent movement of a belt. This belt drive controller controls driving of a belt to intermittently move a belt wrapped around a plurality of supporting rollers including a driven roller and a drive roller. This controller detects a rotation angular displacement or a rotation angular velocity of two supporting rollers having mutually different diameters, and controls driving of the drive roller based on the detected rotation data so that the position of the belt in the direction of movement becomes a predetermined target position.
摘要:
The object of the present invention is to provide an optical recording/reproducing method and apparatus that accurately record data blocks onto an optical disk in a seamless formation while effectively reducing the deterioration of recording properties of the disk. The recording properties of the disk may deteriorate when data is repeatedly written to a same data block of the disk. In the optical recording/reproducing method and apparatus of the invention, a read clock signal is generated in response to recorded data on an optical storage medium. A write clock signal is generated in response to a position information carrying signal detected from the storage medium. A phase difference between the read clock signal and the write clock signal is detected when writing data blocks to the storage medium in a seamless formation. It is determined whether a phase of the write clock signal is delayed or advanced based on the phase difference. In the optical recording/reproducing method and apparatus, a control signal is produced to adjust a phase of the position information carrying signal.
摘要:
An image formation apparatus is provided with a photosensitive drum, an optical writing device which writes an image on the outer surface of the photosensitive drum, a developing device which develops the image using toner an intermediate transfer belt onto which the toner image on the photosensitive drum is transferred, a rotation angle detection unit which detects the rotation angle of the photosensitive drum, an eccentric detection unit which detects the amount eccentricity of the photosensitive drum from the rotary axis of the photosensitive drum, and a correction unit which, obtains eccentricity of the photosensitive drum based on the amount eccentricity, the rotation angle and the radius of the photosensitive drum, and corrects a distortion and a color offset in the toner image based on the obtained eccentricity.
摘要:
An optical recording method for an optical disk having a disk surface portion in which prepits, indicative of preformat information, are formed. In the optical recording method, a portion of a data signal which matches one of the prepits and corresponds to a write mark radially adjacent to one of the prepits is detected. Marks are recorded along a track of the disk by selectively using one of an optimal recording power and a proper recording power level, in accordance with the non-match portion or the match portion of the data signal. A radial width of the marks recorded in accordance with the match portion of the data signal is smaller than a radial width of the marks recorded in accordance with the non-match portion of the data signal. An optical reproducing method is adapted to accurately detect a wobble signal and a prepit signal from the optical disk to which data is recorded by the above optical recording method. Further, a wobble/prepit detection method for optical recording and reproduction is adapted to accurately detect the wobble signal and the prepit signal from the optical disk.