摘要:
A fuel cell system includes a fuel cell apparatus run by liquid fuel, a fuel tank which stores liquid fuel, an auxiliary unit which supplies liquid fuel to the fuel cell apparatus from the fuel tank, and a control unit which controls the fuel cell apparatus, the fuel tank and the auxiliary unit in a general and unified manner. The auxiliary unit is disposed in a position interposed between the fuel tank and the fuel cell apparatus.
摘要:
A magneto-optical recording medium in which the inside of grooves formed along recording tracks is a signal recording area in groove recording, and the domain wall displacement detection method is employed; and a curvature radius R1, in the cross section perpendicular to the recording tracks, of a shoulder portion of a land separating the grooves that is adjacent to the groove is 30 nm or less and a curvature radius R2, in the cross section perpendicular to the recording tracks, of the inside edge portion of the groove for the recording that is adjacent to the land is 20 nm or more, so that a wide recording power margin can be obtained, the jitter can be improved, and the error rate can also be improved.
摘要:
An optical disk apparatus for driving an optical disk on which a groove wobble corresponding to a signal acquired from frequency modulation of biphase modulated address information, and a mark for representing phase information placed inside the wobble are preformatted, and having the biphase bit count “a” (“a” is a natural number) between two of the adjacent marks, and the channel bit count “n” (“n” is a natural number) between two of the adjacent marks. The apparatus includes first clock signal production device for generating a first clock signal utilizing an “n” frequency multiple of the reproduction signal of the clock mark, wobble signal reproduction device for reproducing from the optical disk a wobble signal corresponding to the groove wobble, and frequency demodulation device for acquiring the address information by frequency demodulation of the wobble signal. The frequency demodulation device has a second clock signal generator for generating a second clock signal by frequency dividing a data clock signal supplied from the first clock signal reproduction device by 1/M(M - - - n/(a·s)) in which a clock “s” (“s” is a natural number) is an oversampling value of the biphase bit, a waveform shaping unit for acquiring binary values by waveforming the wobble signal, and a detector for acquiring the address information by processing the second clock signal using the binary signal.
摘要:
An optical disc reproducing device 10 has an optical pickup 11 for reading out digital data recorded on an optical disc, an amplitude detection circuit 18 for detecting the amplitude of a wobble component signal passed by a band pass filter 14, and a tilt detection, target value setting and drive signal generation circuit 23 for carrying out detection of the tilt quantity. In the optical disc reproducing device 10, a laser beam is cast by the optical pickup 11 onto an optical disc having a recording area with its one sidewall wobbled in a predetermined cycle, then the amplitude of each wobble component signal based on a return light in the case where the laser beam is located on the inner circle side or the outer circle side on the optical disc than the wobbled portion is detected by the amplitude detection circuit 18, and the differential value of the amplitude of the respective wobble component signals is found as a tilt indication value by the tilt detection, target value setting and drive signal generation circuit 23.
摘要:
A format of a recording medium suitable for a larger capacity, a higher transfer rate, and integration of pits/lands/grooves is provided. In a first method, in a recordable and reproduceable area, a twin-track structure of lands/grooves is configured such that tracks on which lands become recording tracks and tracks on which grooves become recording tracks form a double spiral. In a read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in a data area. In a second method, in a recordable and reproduceable area, a land/groove-alternate track structure is configured such that grooves become data recording tracks in the circular track next to the circular track in which lands become data recording tracks, and lands become data recording tracks in the next circular track. In the read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in the data area.
摘要:
A magneto-optical disc in which, for preventing damage to a recording layer in case the foreign matter is sandwiched between a magnetic field modulation head and the magneto-optical disc, or the magnetic field modulation head is contacted for some reason with the magneto-optical disc, the direction of magnetization of the recording layer formed on a polycarbonate substrate, designed for transmitting the laser light, is switched by the magnetic field modulation head. The magnetic field modulation head is mounted floating in a direction opposite to the direction of incidence of the laser light from an optical head converged on an objective lens. A diamond-like carbon (DLC) protective film, composed of a thin DLC film, is provided on the surface of recording layer towards the magnetic field modulation head.
摘要:
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 track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of information data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the information recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first and second light receiving sections.
摘要:
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 track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of information data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the information recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first and second light receiving sections.
摘要:
An optical disc has a base formed by resin, and a reflection layer formed on the base. On the base, servo areas where servo pits P1, P2 for providing servo information for sample servo system are formed at predetermined angular positions of respective tracks on the base. Further, data areas where data pits Pd for providing data information accessed by the optical disc drive operative on the basis of the servo pits P1, P2 are formed between the respective servo areas. In addition, in the servo area and the data area which are adjacent to each other, between servo pit P2 disposed at the position closest to the data area and data pit Pd disposed at the position closest to the servo area, anchor pit Pan neglected in the optical disc drive is provided.
摘要:
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 track in a recording region which is narrower than the diameter of a spot of a light beam radiated on the recording area, with recording data obtained on logical processing with recording data recorded on the (n-1)th recording track being recorded on the n-th recording track for increasing the storage capacity of informer, ion data, is disclosed. A return beam of a light beam radiated across two neighboring recording tracks on the optical recording medium is detected by a detector having first and second light receiving sections having a boundary line extending parallel to the recording track of the optical recording medium for reading out the informer, ion recorded on the optical recording medium based on the level of a sum or difference signal of the output signals of the first, and second light receiving sections.