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1. 发明专利

JPH07119861A VALVE AND PUMP 失效
公开(公告)号：JPH07119861A
公开(公告)日：1995-05-12
申请号：JP26353093
申请日：1993-10-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OTANI YOSHIMITSU , HATAKEYAMA IWAO , YOSHIMURA BUNICHI , YAMAZAKI HIRONORI
IPC分类号： F16K31/66 , F03C2/00 , F16K11/052
摘要： PURPOSE:To provide a valve and a pump in which an energy feeding from the external side is unnecessary, and the opening and closing operation, the brancing direction control, and the churning work can be carried out responding to the temperatures of an input gas and an input liquid. CONSTITUTION:In a valve 12 having at least more than one sheet of magnetic bodies 13 and 14 on a rotary shaft, which is set at the branch point of more than two pipe lines A, B, and C, the magnetizing performances of the magnetic bodies 13 and 14 corresponding to the temperature are different each other, and furthermore, magnets 11a and 11b are provided at the branch point.

2. 发明专利

JPH0757235A MAGNETIC RECORDING MEDIUM, RECORDING-REPRODUCING SYSTEM AND RECORDING-REPRODUCING DEVICE 失效
公开(公告)号：JPH0757235A
公开(公告)日：1995-03-03
申请号：JP20407693
申请日：1993-08-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OTANI YOSHIMITSU , HATAKEYAMA IWAO
IPC分类号： G06K19/06 , G11B5/02 , G11B5/65 , G11B5/66 , G11B5/667
摘要： PURPOSE:To obtain a magnetic recording medium, a recording-reproducing system and a recording-reproducing device enhancing the retention stability of information and making it difficult for a 3rd person to make the information visible or to read it. CONSTITUTION:This magnetic recording medium has a magnetic recording layer 2 and a soft magnetic layer 3 having lower coercive force than the layer 2 and exhibiting magnetization in a narrower temp. region than the temp. region in which the layer 2 exhibits magnetization on the magnetic recording surface of the layer 2. In this magnetic recording medium, magnetic recording and reproduction are carried out by this recording-reproducing system in the temp. region in which only the magnetic recording layer 2 exhibits magnetization. This recording-reproducing device has a mechanism for controlling the temp. of a magnetic recording medium.

3. 发明专利

JPH0720347A CONNECTING METHOD FOR OPTICAL WAVEGUIDE AND OPTICAL FIBER 失效
公开(公告)号：JPH0720347A
公开(公告)日：1995-01-24
申请号：JP16544893
申请日：1993-07-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATAKEYAMA IWAO , SUGIYAMA YASUYUKI , MORINAKA AKIRA
IPC分类号： G02B6/30
摘要： PURPOSE:To simplify fine optical axis alignment with the connecting method to be used for connection of an optical waveguide and an optical fiber. CONSTITUTION:The optical waveguide 51 and optical fiber 53 to be connected are disposed to face each other and are fixed by nearly aligning their cores and forming a prescribed spacing. Phase conjugation mirrors 11, 12 are installed at both ends of the optical waveguide 51 and the optical fiber 53. Phase conjugated light is formed from the coherent light entering from one end thereof and is put into an oscillation state. A first photosetting resin injected into the spacing between the optical waveguide 51 and the optical fiber 53 is cured by the phase conjugated light made into the oscillation state, by which a coupled core part having the refractive index coinciding with the refractive index of the respective cores 52, 54 of the optical waveguide 51 and the optical fiber 53 is formed. Further, a second photosetting resin injected into the connecting part of the optical waveguide 51 and the optical fiber 53 is cured by UV rays cast from outside to form the coupled clad layer having the refractive index lower than the refractive index of the coupled core part around the coupled core part.

4. 发明专利

JPH06338077A HIGH DENSITY OPTICAL DISK MEDIUM USING TWO WAVELENGTHS 失效
公开(公告)号：JPH06338077A
公开(公告)日：1994-12-06
申请号：JP4395091
申请日：1991-02-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： CHIBA REIICHI , YAMAZAKI HIRONORI , FUJIMORI SUSUMU , HATAKEYAMA IWAO
IPC分类号： B41M5/26 , G11B7/24
摘要： PURPOSE:To provide a phase change type optical recording medium capable of reading and writing with a laser light source close to 830nm and giving a satisfactory signal even in the case of readout with a laser light source close to 670nm. CONSTITUTION:A lower protective layer, a recording layer which absorbs light and causes degeneration, an upper protective layer and a metallic reflecting layer are successively formed on a substrate, a GeTeSb alloy film is used as the recording layer and transparent protective films each having 1.9-2.2 refractive index are used as the protective layers. The thicknesses (Angstrom ) of the recording layer, the upper and lower protective layers are allowed to satisfy relation (1), (2) or (3) and the objective high density optical disk medium using two wavelengths is obtd. Recording density is increased and high recording and erasing sensitivity is ensured.

5. 发明专利

JPH06230233A PRODUCTION OF SINGLE CRYSTAL OPTICAL FIBER AND ITS APPARATUS 失效
公开(公告)号：JPH06230233A
公开(公告)日：1994-08-19
申请号：JP1890093
申请日：1993-02-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MIYAGI MASAMI , SUGIYAMA YASUYUKI , HATAKEYAMA IWAO , YOKOHAMA ITARU
IPC分类号： C30B13/24 , G02B6/00
摘要： PURPOSE:To provide the process and apparatus for production of the single crystal optical fiber having decreased crystal defects and excellent light transmission characteristics. CONSTITUTION:The part near the solid-liquid boundary of a heated and molten part 11 and the single crystal optical fiber 9 is heated to the temp. below the m.p. of the single crystal optical fiber 9 by a part of a laser beam 7 to be used for heating and melting or another laser beam, thereby, the temp. distribution of the solid-liquid boundary is uniformalized and the rapid cooling of the grown single crystal optical fiber 9 is released in the process for production of the single crystal optical fiber 9 by heating and melting a base material with the laser beam 7, bringing a seed crystal into contact with the base material and moving the seed crystal together with the base material in the same direction. As a result, the good-quality single crystal optical fiber 9 having the decreased crystal defects and the excellent light transmission characteristic is obtd.

6. 发明专利

JPH05341139A 失效
公开(公告)号：JPH05341139A
公开(公告)日：1993-12-24
申请号：JP15361892
申请日：1992-06-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUGIYAMA YASUYUKI , MIYAGI MASAMI , HATAKEYAMA IWAO , YOKOHAMA ITARU
IPC分类号： B01J19/12 , C03B37/025 , C03B37/027 , C30B13/16 , C30B29/62 , C30B33/00 , G02B6/00
摘要： PURPOSE:To manufacture a single crystal optical fiber having a large diameter with a high quality, in which imperfection of crystal is rarely generated, at high speed and low cost. CONSTITUTION:At the time of manufacture of single crystal optical fiber 13 with this device, a base material 12 is heated to be fused by a heating laser beam 11, and a seed crystal 14 is adhered to a fused part 14 of the base material 12, and the seed crystal 14 is moved at a speed V2, and the base material 12 is moved at a speed V1 for drawing. Furthermore, the device is provided with a separate heating source 16 along the moving direction of the seed crystal 14 to realize the optimal temperature gradient required for the growth of a crystal, and the single crystal optical fiber, in which imperfection of crystal is rarely generated, is thereby manufactured.

7. 发明专利

JPH05221788A METHOD AND DEVICE FOR PRODUCING THIN FILM 失效
公开(公告)号：JPH05221788A
公开(公告)日：1993-08-31
申请号：JP4761092
申请日：1992-02-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MIYAGI MASAMI , HATAKEYAMA IWAO
IPC分类号： C30B25/02 , C30B25/04 , C30B30/00 , G01N37/00 , G01Q60/10 , G01Q80/00 , G11B9/00 , G11B9/14
摘要： PURPOSE:To provide the method and device for producing a thin film, especially a spotted or linear thin film at an atomic level. CONSTITUTION:A substrate, an optical head and the head of a scanning tunnel microscope(STM) are arranged in a gaseous reactant atmosphere, a tunnel current is applied on the substrate by the STM, and a laser beam is focused by the optical head. The reactive gas is decomposed by the energies generated by both the laser beam and tunnel current to form a thin film on the substrate. This thin film producing device is provided with a laser beam source, an element for modulating the laser beam from its source, the STM, its control part, a vacuum vessel having a window for introducing the laser beam, a reactive raw gas feeder, a substrate set in the vacuum vessel, the optical head, and the STM head.

8. 发明专利

JPH05142978A WAVELENGTH MULTIPLEX VOLUME HOLOGRAPHY DEVICE 失效
公开(公告)号：JPH05142978A
公开(公告)日：1993-06-11
申请号：JP31098191
申请日：1991-11-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAGI IKUTAKE , SUGIYAMA YASUYUKI , HATAKEYAMA IWAO
IPC分类号： G03H1/26
摘要： PURPOSE:To record plural photographs at the same time, to eliminate such a defect, which is conventionally considered as a problem, that a hologram which is already recorded disappears, and to prevent the diffraction efficiency of the light of the holograms from being attenuated. CONSTITUTION:A recording material is made of photorefractive crystal and a light source 2 consists of plural lasers which differ in wavelength. This crystal may be fiber type single crystal 11. Further, this device may be equipped with a page composer 3 which gives information on a two-dimensional intensity distribution or phase distribution and a prism 5 or holographic optical element which makes its light uniform to one direction. Further, the device may be equipped with a lens 6 which converges the light and a reflecting mirror 8 with a pinhole which reflects light deviating from the focus in a direction different from the axis of incidence. Second higher harmonic light is usable as the laser light emitted by the light source 2.

9. 发明专利

JPH04274402A PRODUCTION OF LIGHTGUIDE 失效
公开(公告)号：JPH04274402A
公开(公告)日：1992-09-30
申请号：JP5953191
申请日：1991-03-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： IWAZAWA AKIRA , HATAKEYAMA IWAO , ANDO SHINJI , YAMAMOTO FUMIO
IPC分类号： G02B6/13 , G02B6/12
摘要： PURPOSE:To obtain the lightguide having excellent flexibility and heat resistance by exposing an argon laser beam to the polyamic acid film on a substrate and curing the film, thereby forming a ployimide film. CONSTITUTION:A polyamic acid soln. 12 is applied on the substrate 11 consisting of glass, etc., the solvent is removed in a vacuum chamber and the soln. at =300 deg.C, by which the polyamic acid film 12 is changed to the polyimide film. The waveguide polyimide film 15 is thus obtd.

10. 发明专利

JPH0130220B2 失效
公开(公告)号：JPH0130220B2
公开(公告)日：1989-06-16
申请号：JP22211982
申请日：1982-12-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIRONO SHIGERU , MAEDA YASUSHI , HATAKEYAMA IWAO
IPC分类号： G11B5/706 , G11B5/64 , G11B5/65 , G11B5/66

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