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91. 发明专利

JP2001249917A MULTI-DIMENSIONAL FAST FOURIER TRANSFORMATION PARALLEL COMPUTATION METHOD AND DEVICE AND RECORDING MEDIUM HAVING ARITHMETIC PROGRAM RECORDED THEREON 失效
公开(公告)号：JP2001249917A
公开(公告)日：2001-09-14
申请号：JP2000061128
申请日：2000-03-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： UENO MASAHIRO , ENDO KATSUHIRO , URA TETSUYA , TANABE TAKANARI , YAMAMOTO MANABU
IPC分类号： G06F17/14
摘要： PROBLEM TO BE SOLVED: To provide multi-dimensional fast Fourier transformation parallel computation method and device and a recording medium having an arithmetic program recorded thereon capable of arithmetically processing multi-dimensional fast Fourier transformation parallel computation at a high speed by simpler constitution without increasing a communication path and transfer time. SOLUTION: By this multi-dimensional fast Fourier transformation parallel computation method, multi-dimensional fast Fourier transformation is performed by parallel computation. At the time of performing the multi-dimensional fast Fourier transformation by computing one-dimensional Fourier transformation for the number of dimensions by a prescribed arithmetic algorithm, after the one-dimensional Fourier transformation of a prescribed dimension is performed, at the time of performing the one-dimensional Fourier transformation of the next dimension, the final stage of the one-dimensional Fourier transformation of the prescribed dimension and the first stage of the one-dimensional Fourier transformation of the next dimension are performed in one arithmetic means.

92. 发明专利

JP2000019939A METHOD AND DEVICE FOR SELECTIVELY READING MULTIPLEX HOLOGRAM RECORDING LAYER 失效
公开(公告)号：JP2000019939A
公开(公告)日：2000-01-21
申请号：JP18588398
申请日：1998-07-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KUROKAWA YOSHIAKI , OKUBO TOSHIBUMI , YAGI IKUTAKE , YAMAMOTO MANABU
IPC分类号： G03H1/22 , G03H1/26 , G03H1/30 , G11B7/00 , G11B7/0065
摘要： PROBLEM TO BE SOLVED: To provide the method and the device for selectively reading multiplex hologram recording layer that data of an objective reproduced hologram picture, are easily and speedingly obtained while an arbitrary recording layer is selected, the reduction in the capacity is almost prevented, and miniaturization and the cost reduction are attained. SOLUTION: The device is provided with a reproducing light source 3, which is a light source, a condensing lens 5, which condenses the light beams from the light source 3 and converts the beams into incident light beams 4, an incident light moving device 6, which moves incident light beams 4 to one incident end of a laminated plane optical waveguide type hologram element 1 that recording layers recording holograms incorporated into a multiplex hologram recording card medium 2 are laminated to guide light beams, a hologram imaging device 10, which images a reproduced hologram image 9 from diffracted light beams 8 by guided light beams 7, a light intensity detector 13, which detects the optical intensities of emitted light beams 11 and scatterd light beams 12, a light intensity discriminating circuit 14, which discriminates the optical intensities detected by the detector 13, and a counter 15 which counts the results of the discriminations performed by the circuit 14.

93. 发明专利

JP2000019938A INFORMATION RECORDED CARD MEDIUM AND READ-OUT DEVICE AND LIGHTING HEAD POSITION METHOD 失效
公开(公告)号：JP2000019938A
公开(公告)日：2000-01-21
申请号：JP18647698
申请日：1998-07-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKUBO TOSHIBUMI , KUROKAWA YOSHIAKI , YAGI IKUTAKE , YAMAMOTO MANABU
IPC分类号： G03H1/18 , G03H1/22 , G03H1/26 , G06K7/12 , G06K19/06
摘要： PROBLEM TO BE SOLVED: To provide an information recorded card medium and a read-out device and a lighting head positioning method capable of facilitating a high speed access positioning and capable of a high speed information transfer by a high speed access readout. SOLUTION: In this device, a multiple hologram layer plate part 11 in which each columnar multistage hologram recorded layer A in which a hologram recorded layer 12 and a separation layer 13 are plurally laminated alternately is plurally arranged parallel in many lines by interposing lighting head insertion groove holes 16 in a card frame 15 is provided and also the lighting head 23 of the read head C vertically provided with respect to a read head elevating/lowering actuator D is preliminarily positioned at a position facing an object light head positioning guide groove 14 along the lighting head insertion groove hole 16 with respect to an information recorded card medium α in which lighting head positioning guide grooves 14 are notchedly provided at columns of incident ports 12a of respective columnar multistage hologram recorded layers A of the lighting head instertion groove holes 16 and, next, the head 23 is engaged with the lighting head positioning guide groove 14 and a coarse positioning elevating/loweringly sliding by aiming at the position supposed to be the incident port 12a of an object hologram recorded layer 12 is performed and, continuously, the precise positioning of the head 23 is performed by fine-adjustingly moving it correctly to the object incident port 21a.

94. 发明专利

JPH1079137A NEAR-FIELD HEAD ASSEMBLY 失效
公开(公告)号：JPH1079137A
公开(公告)日：1998-03-24
申请号：JP23332096
申请日：1996-09-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOSHIKAWA HIROSHI , OKUBO TOSHIBUMI , YAMAMOTO MANABU , TANAKA YURIKO , FUKUZAWA KENJI
IPC分类号： G11B7/135 , G01Q60/18 , G01Q80/00
摘要： PROBLEM TO BE SOLVED: To obtain a near-field head assembly in which a high-speed and large- capacity near field is recorded by a method wherein a recording medium is levitated on an air bearing surface via a very small gap, near-field light which exists near the surface of the recording medium is scattered and the near-field light is converted into an electric signal. SOLUTION: Air bearing surfaces are formed on both sides of a slider core 6, and a head slider 11 for near-field detection is installed so as to be close to a recording medium 2 which is turned at high speed. By the dynamic-pressure effect of a gas generated in a wedge-shaped gap which is formed between the medium 2 which is turned at high speed and the air bearing surface, a core 6 at the slider 11 is levitated on the medium 2 by keeping a very small gap. A triangular scattering body is installed at the front of the core 6 at the slider 11, and the scattering body scatters near-field light which is generated, by a laser light source 5, near a part between the surface 2a of the medium 2 and a surface 2b on the opposite side. The scattered near-field light is converted into an electric signal by a photoelectric conversion means so as to be output as the reproducing signal of recorded information in the recording medium 2.

95. 发明专利

JPH08306045A METHOD AND DEVICE FOR REPRODUCING DATA BY USING LIGHT BEAM 失效
公开(公告)号：JPH08306045A
公开(公告)日：1996-11-22
申请号：JP19212895
申请日：1995-07-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TANABE TAKANARI , YAMAMOTO MANABU , KATO KIKUJI , DOBASHI HISANORI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/005 , G11B7/14
摘要： PURPOSE: To provide a method and device for reproducing the data by using a light beam capable of making data recording on an optical recording medium high density and high speed transferring the reproducing data. CONSTITUTION: In three continuous tracks n-1, n, n+1 on the optical recording medium 4, a first light beam irradiates so that a spot center 11b places between a boundary between the tracks n-1, n and the center of the track n+1, and a second light beam irradiates so that the spot center 12b places between the boundary between the tracks n, n+1 and the center of the track n+1. Then, the reflection light of these light beams from the optical recording medium 4 are detected, and the data recorded on the three tracks are reproduced based on the levels of the detected light. Thus, a signal is detected eliminating influence of a cross talk even when a track pitch is narrowed, and a data transfer speed is improved, and circuit constitution is simplified.

96. 发明专利

JPH06332633A DEFECT RELIEVING DEVICE FOR STORAGE DEVICE 失效
公开(公告)号：JPH06332633A
公开(公告)日：1994-12-02
申请号：JP11822493
申请日：1993-05-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AMANO NOBUO , YAMAMOTO MANABU
IPC分类号： G06F3/06 , G11B20/10 , G11B20/12
摘要： PURPOSE:To execute a defect relief of the storage device economically, and also, at a high speed. CONSTITUTION:Defective address storage registers 103-1, 104-1 store a defective address of a main storage area 102, and switching destination address storage registers 103-2, 104-2 store an address of a spare storage area 105 which becomes a switching destination of these defective addresses. A matcher 107 compares the contents of an address designating register 106 of the main storage area 102 and a defective address of the register 103-1 or 104-1, and writes input data of an input data line in the switching destination address of the register 103-2 or 104-2 of the spare storage area 105 through an AND gate, when both of them coincide with each other, or outputs read-out data of this switching address through AND gates 121-128, and OR gates 171-178. A controller is provided with a defective address registration table being a correspondence table of the defective address and the switching destination address, and rewrites registers 103, 104.

97. 发明专利

JPH06309691A INFORMATION RECORDING DEVICE 失效
公开(公告)号：JPH06309691A
公开(公告)日：1994-11-04
申请号：JP9753193
申请日：1993-04-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TATEMICHI HIDETOSHI , YAMAMOTO MANABU , KATO KIKUJI
IPC分类号： G11B7/00 , G03H1/04 , G11B7/0045 , G11B7/135 , G11B7/20
摘要： PURPOSE:To provide an information recording device capable of recording the hologram of two-dimensional information on a recording medium in a high density and efficiently utilizing the energy of incident laser light. CONSTITUTION:By making the laser light of a frequency nuL from a laser light source 1 incident on an ultrasonic optical deflector 2 to be driven by the sine wave signal of a frequency fn generated by a sine wave signal generator 21, one ultrasonic diffracted light having the frequency of nuL+fn is generated, this is used as a reference light 23 and the zero-order transmitted light of a frequency nuL is used as a signal light 22. Thus, a difference in frequencies between the signal light and the reference light for detemining the multiangle of a angle multi-recording is made the largest for the usable zone of the ultrasonic optical deflector 2, the recording of higher density is made possible and the utilization of all energies of the laser light from the laser light source 1 is made possible.

98. 发明专利

JPH06301979A METHOD AND DEVICE FOR REPRODUCING INFORMATION 失效
公开(公告)号：JPH06301979A
公开(公告)日：1994-10-28
申请号：JP8760893
申请日：1993-04-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO MANABU , KATO KIKUJI , TATEMICHI HIDETOSHI
IPC分类号： G02B27/42 , G11B7/00 , G11B7/005 , G11B7/135
摘要： PURPOSE:To obtain an information reproducing method by which the packing density of a recording medium can be increased by driving an ultrasonic deflector by means of amplitude-modulated signals and reproducing information by using moving interference fringes generated by the interference between a plurality of simultaneously generated diffracted light rays. CONSTITUTION:An amplitude modulator 6 outputs carrier signals inputted from a carrier generator 8 to an ultrasonic deflector 2 after modulating the carrier signals in amplitude by using sine wave signals inputted from a sine wave signal generator 7. The deflector 2 generates two diffracted light rays 9 by simultaneously diffracting a laser beam from a semiconductor laser 100 in two directions. The diffracted light rays 9 are made incident to a recording medium 108 through a lens 101, beam splitter 103, and lens 102 so as to generate reflected light rays 107. The reflected light rays 107 are made incident to a detector 105 and the information recorded on the medium 108 is reproduced by using interference fringes formed by interference between the diffracted light rays 9. When such a constitution is used, the track pitch of the medium can be reduced and an information reproducing method by which the packing density of the medium can be increased is obtained.

99. 发明专利

JPH06243466A INFORMATION RECORDING DEVICE 失效
公开(公告)号：JPH06243466A
公开(公告)日：1994-09-02
申请号：JP3166193
申请日：1993-02-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TATEMICHI HIDETOSHI , YAMAMOTO MANABU
IPC分类号： G03H1/04 , G11B7/00 , G11B7/0065 , G11B7/135
摘要： PURPOSE:To record a high quality two dimensional information hologram on a moving recording medium. CONSTITUTION:Two dimensional information pattern formed by a spatial light modulator 8 is irradiated by parallel beams and diffracted light beams are imaged on the surface of a recording medium surface 11 through a relay lens system 18 and 7. Thus, the image formed on the forming position has the same light wave surface of the diffracted image at the spatial light modulator 8 and the size of the image is recduced to the size decided by the magnification of the system, 18 and 7. That is, the phases of the image formed on the medium 11 are constant over the surface of the medium 11, therefore, the interference image generated by the interference between the above image and a reference beam 10 only include the carrier waves of spatial frequencies only determined by the incident angles of the reference beam 10 and signal beam 9 and no higher order spatial frequency components are inclined. Therefore, if the moving speed of the medium 11 and the spatial frequency of the carrier waves are made compatible, no degradation of higher order spatial frequency components caused by the movement of the medium occurs. Thus, an information recording device is provided with less number of errors in information recording and with a high reliability.

100. 发明专利

JPH06162510A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH06162510A
公开(公告)日：1994-06-10
申请号：JP33654892
申请日：1992-11-24
申请人： NIKON CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： NAGASAWA MASAYA , HOSHINO SHUNJI , YAMAMOTO MANABU
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/125 , G11B11/10 , G11B11/105
摘要： PURPOSE:To keep the stability in the optical output precision by having a light emitting timing control means which generate timing signals that give the instruct of a start of a recording or an erasing right after the completion of a preformatted portion. CONSTITUTION:A control unit 9 receives recorded signals from the outside, supplies the recorded signals to a laser driving control circuit 5 or receives reproduced signals outputted from a data signal processing section 17, supplies them to the outside as a prescribed format and performs other control operations. A light emitting timing control section 7 generates prescribed timing signals which indicate a start timing of a recording or an erasing basing on the ID detection signals from an address signal processing section 13 and supplies them to the circuit 5. In this case, most of the circuit devices are realized by a single microprocessor which is properly programmed.

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