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71. 发明专利

JP2001325729A DATA RECORDING MEDIUM 失效
公开(公告)号：JP2001325729A
公开(公告)日：2001-11-22
申请号：JP2000141433
申请日：2000-05-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TANABE TAKANARI , KUROKAWA YOSHIAKI , FURUYA AKINORI , UENO MASAHIRO , YAMAMOTO MANABU
IPC分类号： G02B5/18 , G03H1/22 , G06K7/12 , G06K19/06 , G11B7/0065 , G11C13/04
摘要： PROBLEM TO BE SOLVED: To provide a data recording medium in which the data recorded in each of a plurality of recording layers having periodical light-scattering factors can be surely separated and reproduced. SOLUTION: In an optical card 11 produced by laminating a plurality of recording layers having periodical light-scattering factors, lines in a rugged pattern which constitute the periodical light-scattering factors of recording layers L1, L2, L3 are formed with different pitches from one another so that the outgoing direction of the diffracted light 16, 17, 18 of the incident light 13 in one direction differs from one another for the respective recording layers. Thus, only the diffracted light from a specified layer can reach a detector 12 and only the data recorded in the specified layer can be reproduced.

72. 发明专利

JP2000155960A READER AND MEDIUM FOR OPTICAL MEMORY 失效
公开(公告)号：JP2000155960A
公开(公告)日：2000-06-06
申请号：JP32570598
申请日：1998-11-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KUROKAWA YOSHIAKI , TANABE TAKANARI , YAMAMOTO MANABU
IPC分类号： G11B7/24 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide an optical memory reader by which information recorded in a card-type optical memory medium with a laminated plane optical waveguide hologram can be read out at high speed and simply. SOLUTION: A light source 5 is provided. A condensing-lens array 7 by which reproducing light discharged to the outside of the face of an optical memory medium 4 is condensed on an imaging element 6 is provided. An optical-system-unit integral movement mechanism 8 by which the optical systems 5, 6, 7 are moved integrally is provided. A card-position detection mechanism 3 which detects the position of the optical memory medium 4 is provided. On the basis of detection information by the detection mechanism 3, the optical systems 5, 6, 7 are positioned coarsely. After that, on the basis of the output value of a PD 31, the position of the light source 5 is adjusted fine by a light-source fine adjustment mechanism 51. In addition, on the basis of the output of a contrast comparison circuit 9 which compares the difference in a quantity of light between respective pixels of an element 61 for focus-position detection, the position of the condensing-lens array 7 is adjusted fine by a condensing- lens fine adjustment mechanism 71. In the optical memory medium 4, a pattern for focus detection is buried at the inside of a data pattern region or independently.

73. 发明专利

JP2000149323A INFORMATION RECORDING MEDIUM AND RECORDING/REPRODUCING METHOD THEREFOR 失效
公开(公告)号：JP2000149323A
公开(公告)日：2000-05-30
申请号：JP32490398
申请日：1998-11-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TANABE TAKANARI , KUROKAWA YOSHIAKI , YAMAMOTO MANABU
IPC分类号： G06K7/12 , G11B7/00 , G11B7/005 , G11B7/0065 , G11B7/24
摘要： PROBLEM TO BE SOLVED: To record multiple values of information in a unit recording region. SOLUTION: Since light propagating in a recording layer 3 leaks from projecting parts 5 formed on the surface of recording layer 3, 2m kinds of rugged patterns are prepared to record m-bits of information on a unit recording region 4, and this makes it possible for the light intensity leaking from the rugged patterns through the recording layer 3 to take 2m gradation values, to record multiple values of m-bit information in the unit recording region.

74. 发明专利

JP2000149318A INFORMATION READ-OUT DEVICE 失效
公开(公告)号：JP2000149318A
公开(公告)日：2000-05-30
申请号：JP32492198
申请日：1998-11-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TANABE TAKANARI , KUROKAWA YOSHIAKI , YAMAMOTO MANABU
IPC分类号： G06K19/06 , G03H1/22 , G06K7/12 , G11B7/0065 , G11B7/13 , G11B7/135 , G11C13/04
摘要： PROBLEM TO BE SOLVED: To miniaturize the device. SOLUTION: A memory card 11 has a multi-layer type hologram 12 formed by laminating plural recording layers from which information is reproducible. An object lens 2 focuses a laser beam 1 on the memory card 11. A focusing optical system 3 focuses light leaking from the memory card 11. A magnifying optical system 4 optically magnifies the light from the focusing optical system 3, and makes it incident on two-dimensional photodetector 5, so that the light leaking from each unit recording region in a recording layer 13 and each detecting element of the two-dimensional photodetector 5 have a one-to-one correspondence.

75. 发明专利

JPH10222966A DEVICE AND METHOD FOR REMEDYING DEFECT OF RECORDING MEDIUM IN LIBRARY DEVICE 失效
公开(公告)号：JPH10222966A
公开(公告)日：1998-08-21
申请号：JP2537697
申请日：1997-02-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AMANO NOBUO , TANABE TAKANARI , YAMAMOTO MANABU
IPC分类号： G11B20/10 , G11B20/12 , G11B20/18 , G11B27/00
摘要： PROBLEM TO BE SOLVED: To provide a device and method for remedying the defect of a recording medium in a library device for speedily reading and writing information that contains a defect substitution processing for each recording medium. SOLUTION: First temporary storages 44-1 to 44-3 for temporarily storing information instead of a substitution sector in an optical disk are provided at drive devices 43-1 to 43-3 and at the same time a second temporary storage 45 for strong the recording information of the substitution sectors of a plurality of optical disks 41-1 to 41-n in installed. Then, at the time when an optical disk is incorporated initially, the substitution sensor information is stored at the temporary storage 45. When an access request is generated, the substitution sector information of the corresponding optical disk is transferred to the first temporary storage from the second temporary storage instead of the substitution sector of the optical disk, thus immediate reading and writing of information containing a defect substitution processing can be effected.

76. 发明专利

JPH08249897A WAVELENGTH MULTIPLEX HOLOGRAPHY RECORDER 失效
公开(公告)号：JPH08249897A
公开(公告)日：1996-09-27
申请号：JP4806295
申请日：1995-03-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KUME TATSUYA , NONAKA KOTARO , YAMAMOTO MANABU
IPC分类号： G11C17/00
摘要： PURPOSE: To obtain a wavelength multiple holography recorder which is made short in coherence length, allows the utilization of a wavelength variable LD of small output at a light source and is small in size and easy to handle by using optical systems of a symmetrical type and approximating the optical path difference between signal light and reference light to zero. CONSTITUTION: A laser beam 2 from the wavelength variable LD 1 is subjected to directional adjustment by mirrors 3, 5 and after the beam diameter is adjusted by a beam expander 4, this laser beam is spectrally split to the reference light 7 and the signal light 8. The reference light 7 and the signal light 8 are passed respectively through shutters 9, 10 and are projected by mirrors 11, 12 to a photorefractive crystal 16, by which interference fringes are formed. The optical systems are symmetrically arranged in such a manner that the optical path quantities of the reference light 7 and the signal light 8 are decreased. The reference light 7 forms interference fringes of a high contrast with the signal light by an ND filter 13 and a beam expander 14. The multiple recording is executed by changing the wavelength of the LD 1 and changing the modulation patterns of the signal light 8.

77. 发明专利

JPH06338159A OVERLAPPINGLY CHARGEABLE CARTRIDGE 失效
公开(公告)号：JPH06338159A
公开(公告)日：1994-12-06
申请号：JP12405593
申请日：1993-05-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MIZUKAMI MAKOTO , IWAZU SHIGETARO , SAKAI MASAO , IZAWA NOBUYOSHI , KATO KIKUJI , YAMAMOTO MANABU
IPC分类号： G11B23/03 , G11B23/02 , G11B23/023
摘要： PURPOSE:To enhance the mounting density of disk media in a cartridge and to shorten the time for handling the disk media. CONSTITUTION:A overlappingly chargeable cartridge 5 has a plurality of disk holders 4 for holding optical disks 1 in disk housing holes 4a and a casing 2 for housing the disk holders 4 in the stacked state. A spacer 3, which holds the optical disk from the upper and lower sides, is held between the respective disk holders 4. Notches are formed in the corner parts of the disk holder 4 so that the intended disk holder 4 can be readily taken out with a handling mechanism.

78. 发明专利

JPH0676334A MANAGEMENT METHOD FOR CLEANING OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0676334A
公开(公告)日：1994-03-18
申请号：JP22850692
申请日：1992-08-27
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MASAKI ISAO , YANAGI SHIGETOMO , YAMAMOTO MANABU
IPC分类号： G11B7/12 , G11B7/121 , G11B23/02 , G11B33/10 , G11B33/14 , G11B19/02 , G11B19/06
摘要： PURPOSE:To properly give notice of the necessary time for cleaning concerning a cleaning management method for an optical disk device for cleaning an optical head, etc., of the optical disk device. CONSTITUTION:An optical disk device comprizes an optical head 10 for reading at least information by irradiating an optical disk 20 made to be rotated by a spindle motor 15 with light and a controlling part 44 for controlling the relevant optical head 10. Then, the controlling part 44 measures the rotational time of the spindle motor 15 and outputs a cleaning demand for the optical head based on the measured rotational time.

79. 发明专利

JPH0520817B2 失效
公开(公告)号：JPH0520817B2
公开(公告)日：1993-03-22
申请号：JP16673183
申请日：1983-09-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO MANABU , KAWAGUCHI HITOSHI , UKITA HIROO
IPC分类号： G06K7/10 , G02B6/122 , G02B6/28 , G02B6/42 , G11B7/08 , G11B7/12 , G11B7/122 , G11B7/124 , G11B7/135

80. 发明专利

JPH0410260A INFORMATION ERASING, RECORDING AND REPRODUCING SYSTEM 失效
公开(公告)号：JPH0410260A
公开(公告)日：1992-01-14
申请号：JP11121290
申请日：1990-04-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TATEMICHI HIDETOSHI , YAMAMOTO MANABU
IPC分类号： G11B11/10 , G11B7/00 , G11B7/005 , G11B7/0055 , G11B7/30 , G11B11/105
摘要： PURPOSE:To prevent the occurrence of unerased leftovers at the time of erasing a signal and to reduce read errors of a signal at the time of reproducing the signal by setting an erasing beam diameter larger than a recording beam diameter while a reproducing beam diameter smaller than the recording beam diameter. CONSTITUTION:On the information erasing, recording and reproducing system for performing erasing, recording and reproducing by irradiating an optical recording medium with an erasing beam, a recording beam and a reproducing beam from a laser light source, the medium is irradiated with the recording beam CWB of a prescribed beam diameter XW emitted from a recording laser beam source at the time of recording, and irradiated with the erasing beam CEB emitted from an erasing laser beam source having its beam diameter XE that is larger than the beam diameter XW of the recording beam CWB at the time of erasing. Also, the medium is irradiated with the reproducing beam CRB emitted from a reproducing laser beam source having its beam diameter that is smaller than the beam diameter XW of the recording beam CWB at the time of reproducing. By this method, the occurrence of unerased leftovers of a signal at the time of erasing can be prevented, and noise is reduced, and then read errors of a signal at the time of reproducing can be reduced.

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