专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JP2004035369A Method of manufacturing optical fiber preform 审中-公开
公开(公告)号：JP2004035369A
公开(公告)日：2004-02-05
申请号：JP2002198081
申请日：2002-07-08
申请人： Mitsubishi Cable Ind Ltd , 三菱電線工業株式会社
发明人： ITO HIDEAKI , KIN MASATAKA , NAGAE NOBUSADA
IPC分类号： G02B6/00 , C03B37/012
CPC分类号： C03B37/0124
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical fiber preform for cleaning the surface of a quartz rod material by flame polishing so as to suppress the occurrence of cracks in the quartz rod material. SOLUTION: A rod material 2 is obtained by heating and drawing a primary preform 1 in a furnace 5. A gas burner 22 is provided above the furnace 5, and stains or defects on the surface of the rod material 2 are eliminated by blowing flame 21 onto the rod material immediately after drawing. Strain caused by blowing of the flame 21 does not occur in the rod material 2 since blowing of the flame 21 is performed before the rod material 2 is cooled down. COPYRIGHT: (C)2004,JPO

42. 发明专利

JP2002249332A APPARATUS FOR PRODUCING OPTICAL FIBER PREFORM AND METHOD FOR PRODUCING THE SAME 失效
公开(公告)号：JP2002249332A
公开(公告)日：2002-09-06
申请号：JP2001043390
申请日：2001-02-20
申请人： MITSUBISHI CABLE IND LTD
发明人： ITO HIDEAKI , KIN MASATAKA , NAGAE NOBUSADA
IPC分类号： G02B6/00 , C03B37/012
摘要： PROBLEM TO BE SOLVED: To provide a production apparatus of an optical fiber preform capable of maintaining good airtightness in a large-sized pipe. SOLUTION: The production apparatus for producing an optical preform is provided with a handling jig 100 fixed to the upper end of a large-sized pipe 111 used in a rod in tube method and a clamping part 200 for clamping the handling jig 100. The handling jig 100 has an interior cavity 105 into which gas or fluid is introduced. The handling jig 100 is forcibly cooled by introducing gas or fluid into the cavity 105.

43. 发明专利

JP2001139338A METHOD FOR MANUFACTURING OPTICAL FIBER PREFORM 失效
公开(公告)号：JP2001139338A
公开(公告)日：2001-05-22
申请号：JP32192099
申请日：1999-11-12
申请人： MITSUBISHI CABLE IND LTD
发明人： ITO HIDEAKI , YAMAMOTO TETSUYA
IPC分类号： C03B37/012 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing optical fiber preforms capable of efficiently manufacturing the optical fiber preforms having small variations in characteristics with respect to specifications by a simple process. SOLUTION: This method for manufacturing the optical fiber preforms by using a rod-in tube method includes a stage for determining a target C/C value in accordance with the given specifications, a stage for selecting one glass rod from plural glass rods, a stage for preparing plural clad pipes, a stage for calculating a target sectional area S in accordance with the specific refractive index difference and sectional area of the one selected glass rod and a stage for selecting the clad pipe having the sectional area most approximate to the target sectional area S from the plural clad pipes.

44. 发明专利

JP2000185930A PRODUCTION OF OPTICAL FIBER PREFORM 失效
公开(公告)号：JP2000185930A
公开(公告)日：2000-07-04
申请号：JP36621898
申请日：1998-12-24
申请人： MITSUBISHI CABLE IND LTD
发明人： KIN MASATAKA , ITO HIDEAKI , SHIMOYAMA YOSHIO
IPC分类号： C03B37/018 , C03B37/014
摘要： PROBLEM TO BE SOLVED: To obtain an optical fiber preform capable of improving the productivity as a whole by making the deposition rate and deposition yield of glass microparticles balanced. SOLUTION: This optical fiber preform is obtained as follows: glass microparticles produced by hydrolysis of a stock gas in an oxyhydrogen flame is deposited on a starting material. In the early stages of deposition, the flow of the stock gas blown from a stock gas jet nozzle is controlled to be greater to raise the rate of deposition, while in the later stage of deposition, the flow of the stock gas blown is controlled to be lower to raise the yield of deposition.

45. 发明专利

JPH06194449A OPTICAL FIBER SENSOR 失效
公开(公告)号：JPH06194449A
公开(公告)日：1994-07-15
申请号：JP3633992
申请日：1992-02-24
申请人： MITSUBISHI CABLE IND LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAZAWA MASATAKA , KIMURA YASURO , TANAKA HIROYUKI , OMAE TOSHIKAZU , YOSHIDA MINORU , ITO HIDEAKI
IPC分类号： G01J5/08 , G01K11/12 , G01T1/00 , G02B6/00 , G08C23/04 , G08C25/00
摘要： PURPOSE:To positively detect temperature change and presence or absence of radiation over a wide space and area. CONSTITUTION:An optical fiber sensor 1 is provided with a distribution constant type Er fiber 2 where Er (erbium) is doped at a low concentration of approximately 0.01-2.8ppm, an excitation light source 4 of the distribution constant type Er fiber 2, and an optical pulse tester 6 for allowing light pulses to enter the distribution constant type Er fiber 2 and at the same time for receiving the scattered light returning from the distribution constant type Er fiber 2. Then, a wave mixer 22 for mixing the excitation light from the excitation light source 4 with the light pulses from the optical pulse tester 6 is provided at least at the incidence edge side out of the incidence edge side and the lrradiation edge side of the distribution constant type Er fiber 2.

46. 发明专利

JPH01302210A OPTICAL BRANCHING/COUPLING DEVICE 失效
公开(公告)号：JPH01302210A
公开(公告)日：1989-12-06
申请号：JP13219288
申请日：1988-05-30
申请人： MITSUBISHI CABLE IND LTD
发明人： ITO HIDEAKI , FUJITA MORIYUKI
IPC分类号： G02B6/28 , G02B6/30
摘要： PURPOSE:To obtain the optical branching/coupling device which has excellent light transmission efficiency and is miniaturized by directly adhering optical connector parts consisting of a receptacle to the end face of a high-polymer light guide. CONSTITUTION:A high-polymer waveguide element 12 having a branch waveguide 13 in a high-polymer film is reinforced by a supporting substrate 11 and the optical connector part 2 consisting of the receptacle subjected to optical axis alignment is directly adhered by an adhesive agent to the end face of the waveguide. Since an optical fiber and optical connector connecting parts do not exist between the end face of the waveguide and the optical connector part 2, the excellent light transmission efficiency is obtd. The problem of the fiber breakage admitted at the time of connection of a vehicle type is eliminated and the easier handling workability is obtd. The easy replacement of the optical fiber with the optical fiber meeting applications without replacing the receptacle is possible as well.

47. 发明专利

JPH01265235A OPTICAL SECOND HARMONIC WAVE GENERATING ELEMENT AND PRODUCTION THEREOF 失效
公开(公告)号：JPH01265235A
公开(公告)日：1989-10-23
申请号：JP9428588
申请日：1988-04-16
申请人： MITSUBISHI CABLE IND LTD
发明人： MORITA YUKIO , FUJITA MORIYUKI , ITO HIDEAKI
IPC分类号： G02B6/12 , G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37
摘要： PURPOSE:To improve conversion efficiency by orienting and crystallizing an org. nonlinear optical material incorporated in a waveguide by impression of a voltage thereto, then converting the incident light on one end of the waveguide to a second harmonic wave, releasing the wave from the other and confining the incident light. CONSTITUTION:The optical second harmonic wave generating element is constituted by providing electrodes 1, 3 on the waveguide layer 2. The element is so formed that laser light of a wavelength lambda is projected to the waveguide from one end thereof and the light of 1/2.lambda wavelength is taken out. The wavelength conversion is executed by the oriented and crystallized org. nonlinear optical material in the waveguide. The orientation and crystallization are executed by impressing the DC voltage to the upper and lower electrodes of the waveguide layer. The voltage of about 1V/mum suffices. A Cerenkov radiation system which can take automatic phase matching is adopted to the waveguide as the efficiency is higher with this waveguide if the phases of the incident light (wavelength lambda) and the taken-out light (wavelength 0.5lambda) are matched. The incident light is confined in the waveguide and the state of high energy density is attained. The conversion efficiency is proportionally improved. The org. nonlinear optical material has a less tendency to deterioration in properties. The orientation and crystallization are reproduced by impression of the voltage.

48. 发明专利

JPS6411464A EXPOSURE HEAD FOR COLOR SCANNER 失效
公开(公告)号：JPS6411464A
公开(公告)日：1989-01-17
申请号：JP16673987
申请日：1987-07-03
申请人： MITSUBISHI CABLE IND LTD
发明人： FUJITA MORIYUKI , SATAKE TAKESHI , KATSUYAMA MASAO , ITO HIDEAKI
IPC分类号： H04N1/036 , G02B6/00 , G02B6/06 , G02B6/30 , H04N1/04
摘要： PURPOSE:To perform color print superior in quality, by radiating a laser beam by narrowing an interval between the laser beams smaller than that between the laser beams emitted from the arranging end face of an optical fiber in an array. CONSTITUTION:The same number of light waveguides 73 of a probe 7 as that of optical fibers 11 being arranged at the terminal plane 21 of the array 2 are formed independently without being multiplexed. The interval d1 between the end faces of the waveguides 73 at a coupling end face 71 to be coupled with the terminal plane 21 is set fitting to the arranging interval of the cores 12 of the fibers 11. And each core 12 is coupled with the waveguide 73 optically, and the laser beam in the array 2 is introduced to the waveguide 73 of the probe 7 individually, and is radiated from an end part 72, The interval d2 between the end faces of the waveguides 73 at the end part 72 is set smaller than the interval d1, and the interval between the waveguides 73 is formed in a tapered shape so as to be decreased advancing from the coupling part 71 to the end part 72. Therefore, the interval of each beam emitted from the end part 72 is narrowed smaller than that of the beams emitted from the arranging end face of the array 2.

49. 发明专利

JPS6410103A OPTICAL DISPLACEMENT SENSOR 失效
公开(公告)号：JPS6410103A
公开(公告)日：1989-01-13
申请号：JP16673887
申请日：1987-07-03
申请人： MITSUBISHI CABLE IND LTD
发明人： FUJITA MORIYUKI , KATSUYAMA MASAO , ITO HIDEAKI
IPC分类号： G01D5/30 , G01B11/00
摘要： PURPOSE:To measure the quantity of displacement with high accuracy by setting the interval between the light projection and reception surface of a probe and a reflecting plate previously without any error. CONSTITUTION:When the reflecting plate 18 vibrates on detecting external vibrations and the interval S between the light projection and reception surface 12b and a body 18 to be measured varies, the ratio of the quantity of light reception to a light emitting element 20 varies, so the vibration quantity of the reflecting plate 18 is measured from the variation quantity of the ratio and the measurement result is displayed on a display device 8. Here, W is the waveguide width of the light projection and reception surface 12b of the probe 14, S is the interval between the light projection and reception surface 12b and reflecting surface 18, and theta is the opening angle of the light projection and reception surface. When the reflecting plate 18 is within a linear area of S>=W/(2tantheta), light which is emitted by the light projection and reception surface 12b of the probe 14 and reflected by the reflecting plate is incident regularly on the light reception surface 12b.

50. 发明专利

JP2003054973A Method for manufacturing optical fiber preform 有权
标题翻译：制造光纤预制件的方法
公开(公告)号：JP2003054973A
公开(公告)日：2003-02-26
申请号：JP2001251374
申请日：2001-08-22
申请人： Mitsubishi Cable Ind Ltd , 三菱電線工業株式会社
发明人： ITO HIDEAKI , KIN MASATAKA , NAGAE NOBUSADA , FUKUDA AKIHIKO , SHIMONO TOMONORI , MIYASHITA KEIJI
IPC分类号： C03B37/012
CPC分类号： C03B37/0124 , Y02P40/57
摘要： PROBLEM TO BE SOLVED: To manufacture an optical fiber preform 4 with suppressed decentering of a core when the optical fiber preform 4 is manufactured by simultaneously integrating and drawing a glass pipe 1 and a glass rod 2. SOLUTION: The glass rod 2 for a core or for a core and a clad is put in the glass pipe 1 for a clad, the glass pipe 1 is evacuated under heating with a heater 3 and the glass pipe 1 and the glass rod 2 are simultaneously integrated and drawn. At this time, the glass pipe 1 and the glass rod 2 are integrated in a state where tension is applied to the longitudinal direction of the glass rod 2 by making the feed velocity VR of the glass rod 2 lower than the feed velocity VP of the glass pipe 1.
摘要翻译：要解决的问题：通过同时整合和拉制玻璃管1和玻璃棒2制造光纤预制棒4时，制造具有抑制芯的偏心的光纤预制棒4.解决方案：用于芯的玻璃棒2 或者将芯和包层放入用于包层的玻璃管1中，玻璃管1在加热器3的同时被加热抽真空，并且玻璃管1和玻璃棒2同时整合并拉伸。此时，玻璃管1和玻璃棒2通过使玻璃棒2的进给速度VR低于玻璃棒2的进给速度VP而向玻璃棒2的长度方向施加张力的状态一体化玻璃管1。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式