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61. 发明专利

JPH0313811A METHOD FOR MEASURING RADIUS OF CURVATURE 失效
公开(公告)号：JPH0313811A
公开(公告)日：1991-01-22
申请号：JP14671189
申请日：1989-06-12
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HATTORI YASUJI , INOUE SUSUMU , MOBARA MASAICHI
IPC分类号： G01B21/20 , G01M11/02
摘要： PURPOSE:To measure the radius of the curvature of a material to be measured by rotating the material to be measured on a rotary stage, measuring the distance to the material to be measured, and making the specified axis of the material to be measured agree with the rotating axis of the rotary stage based on the distance. CONSTITUTION:A double-axis direct advance stage comprising direct advance stages 5a and 5b is provided on a rotary stage 3. A body under test 7 is mounted on the double-axis direct advance stage 5. The rotary stage 3 is rotated, and the change in distance to the body under test 7 is measured by an optical probe meter 10. The double-axis direct advance stage 5 is adjusted in correspondence with the value which is computed based on the obtained distance. The measuring axis of the body under test 7 is made to agree with the rotating axis of the rotary stage 3. The radius of the curvature of the body under test 7 is obtained based on the output of the optical probe meter 10 under this state.

62. 发明专利

JPH02123303A METHOD FOR PREVENTING RADIATION DETERIORATION OF OPTICAL FIBER 失效
公开(公告)号：JPH02123303A
公开(公告)日：1990-05-10
申请号：JP27600988
申请日：1988-11-02
申请人： POWER REACTOR & NUCLEAR FUEL , SUMITOMO ELECTRIC INDUSTRIES
发明人： SUZUKI YASUO , ICHIGE YOSHIAKI , WADA YUKIO , CHIGUSA YOSHIKI , HATTORI YASUJI , WATANABE MINORU
IPC分类号： G02B6/00
摘要： PURPOSE:To more effectively prevent the radiation deterioration of the optical fiber by making the light for bleaching incident at a specific quantity to the optical fiber at the time of use. CONSTITUTION:The light for bleaching is made incident at to the optical fiber at the time of using the optical fiber in a radiation atmosphere. Namely, a photobleaching effect appears and a transmission loss decreases drastically simultaneously with the incidence of the light for bleaching when this light is made incident to the optical fiber which is placed in the radiation atmosphere and is increased in the transmission loss. The loss increases sharply when the incidence of the light for bleaching is stopped but the loss decreases drastically when the incidence of the light for bleaching is made incident again to the fiber at the time of using the fiber. The increase of the loss in the radiation atmosphere is effectively prevented in this way and the life of the light source for bleaching is greatly prolonged.

63. 发明专利

JPH02112706A POSITION DETECTING CIRCUIT 失效
公开(公告)号：JPH02112706A
公开(公告)日：1990-04-25
申请号：JP26552788
申请日：1988-10-21
申请人： ANDO ELECTRIC , SUMITOMO ELECTRIC INDUSTRIES
发明人： TAKEI SHOICHI , YANO TETSUO , HATTORI YASUJI , SUZUKI SHUZO
IPC分类号： G01B11/00
摘要： PURPOSE:To simplify the constitution of an optical system by knowing a distance between a beam waist position and an object to be measured from a rise or fall time of a detected signal, and knowing a position relation before and behind the object to be measured from a scattered light of the object to be measured. CONSTITUTION:When an object 6 to be measured is separated from a beam waist position, the beam diameter which intersects the object 6 to be measured becomes large, therefore, a rise of a signal outputted from a photodetector 5 is varied as a broken line from a full line. When the beam is varied by a distance without varying a distribution state in accordance with an expression I, for instance, like an interval extending from 10 to 90%, it is known by a calculation that an interval corresponding to some prescribed ratio of power is proportional to a beam diameter W. As shown clearly in the expression I, when a distance X is fixed, the beam diameter W is fixed respective of a distance in the scanning direction. Accordingly, the distance X in the optical axis direction is known from the time (t) irrespective of the position in the scanning direction of the object 6 to be measured. In such a way, the constitution of an optical system is simplified.

64. 发明专利

JPH01153939A CALIBRATING METHOD FOR MEASURING INSTRUMENT FOR LASER BEAM DEFLECTION ANGLE 失效
公开(公告)号：JPH01153939A
公开(公告)日：1989-06-16
申请号：JP31184587
申请日：1987-12-11
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： INOUE SUSUMU , HATTORI YASUJI
IPC分类号： G01M11/00 , G01M11/02 , G01N21/41
摘要： PURPOSE:To accurately calibrate the device even in liquid whose refractive index is close to that of glass by arranging a hollow prism which has a parallel part and a slanting part in its opposite flanks in the liquid. CONSTITUTION:While a laser beam from a laser generator 1 does not passes through the hollow prism 11, the light spot position P0 of the beam on a photodetector 8 is measured. Then the prism 11 is put in the oil 4 in a liquid tank 3 and while the beam passes through the parallel surfaces A and C of the prism 11, the arrangement angle (tilt angle and horizontal rotation) of the prism 11 are so adjusted that the light spot position on the photodetector 8 is at the same position with P0. Consequently, the surfaces A and C become perpendicular to the optical axis. While this state is maintained, the prism 11 is lifted to allow the beam pass through the slanting part (surfaces A and B: vertical angle theta), thereby measuring the position P2 of the light spot on the photodetector 8 at this time. Then a microcomputer finds the distance L between the positions P0-P2 and the conversion coefficient of the deflection angle phi of the beam is found from the distance.

65. 发明专利

JPS6428533A STRUCTURE PARAMETER MEASURING APPARATUS FOR OPTICAL FIBER 失效
公开(公告)号：JPS6428533A
公开(公告)日：1989-01-31
申请号：JP18418587
申请日：1987-07-23
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HATTORI YASUJI , INOUE SUSUMU
IPC分类号： G01B11/00 , G01B11/08 , G01M11/00 , G02B6/00
摘要： PURPOSE:To enable a reduction in measuring time and highly accurate measurement, by a method wherein monochromatic light from a plurality of light sources is made incident into a plurality of optical fibers for guiding light and outgoing luminous fluxes are concentrated and made parallel to irradiate the side of an optical fiber to be measured. CONSTITUTION:Light emitted from monochromatic light sources LEDs 1a, 1b... and 1g is made incident into optical fibers 11a, 11b... and 11g for guiding light through a condenser lens. Other ends of the fibers 11a, 11b... and 11g are bundled with a sleeve 12 to aggregate outgoing end faces 13a, 13b... and 13g. Outgoing light integrally concentrated is made parallel with a lens 2 to be irradiated from the direction vertical to the optical axis of an optical fiber 3 to be measured. Thus, monochromatic light with a high brightness is made incident into the fiber 3 to reduce the measuring time thereby enabling highly accurate measurement of a structure parameter of the fiber 3.

66. 发明专利

JPS62259003A POSITION DETECTION SENSOR 失效
公开(公告)号：JPS62259003A
公开(公告)日：1987-11-11
申请号：JP10194286
申请日：1986-05-06
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HATTORI YASUJI , INOUE SUSUMU
IPC分类号： G01B11/00
摘要： PURPOSE:To reduce the size of the structure of a detection part and to detect the position of an objective body with high resolution by forming the image of the objective body on an end surface of a multicore fiber formed by arraying plural optical fiber cores linearly. CONSTITUTION:The output light of an optical transmitter 1 illuminates the optical fiber 6 installed on a moving base 8 as the objective body. The image of its tip end part 16 is expanded by a lens system 10 and formed on the end surface 12 of the multicore fiber 11 which has the linear array structure. The fiber core 13 is coupled optically with the photodetector 4 at the other end 14 of the fiber 11. The detector 4 is therefore capable of detecting variation in the quantity of photodetection of the fiber core array at the terminal of the fiber 11. Further, the position of the tip part 16 can be detected with resolution of about 1mum from the diameter and array pitch of the core 13. Consequently, the tip part 16 is accurately positioned at the light beam convergence point of an optical fiber excitation system.

67. 发明专利

JPS6264930A METHOD FOR MEASURING BACK SCATTERING LIGHT 失效
公开(公告)号：JPS6264930A
公开(公告)日：1987-03-24
申请号：JP20493385
申请日：1985-09-17
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HATTORI YASUJI
IPC分类号： G02B6/00 , G01M11/00 , G01M11/02 , G01N21/49
摘要： PURPOSE:To estimate the real level of back scattering light, by performing the inverse operation of convolution integration in a time region or a frequency region from the preliminarily calculated impulse response and observation wave form of the measuring system of back scattering light. CONSTITUTION:A measuring system is constituted of semiconductive laser 1, lenses 2, 3, 7, an optical fiber 4, a half mirror 6, a detector 8 and an oscilloscope 9 and rectangular wave with an incident pulse of about 1mus is used. The frequence response of the measuring system is preliminarily calculated from the impulse response of said measuring system. Next, the observation wave from detected by the detector 8 is subjected to Fourier transformation and divided by the frequence response of the measuring system to make it possible to clearly estimate the abnormal point of the wave form of back scattering light.

68. 发明专利

JPH0933654A DETECTION METHOD OF DISCRIMINATION MARK 失效
公开(公告)号：JPH0933654A
公开(公告)日：1997-02-07
申请号：JP18402195
申请日：1995-07-20
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SATOU TOSHIHISA , MOBARA MASAICHI , HATTORI YASUJI
IPC分类号： G02B6/24 , G01S17/06 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To efficiently detect a discrimination mark by a constitution wherein each of the discrimination marks comprises a regulation reflection section that reflects a light having a predetermined regular wavelength. SOLUTION: Each of discrimination marks 1, 2...m on an optical passage comprises a regulation reflection section that reflects a light having a predetermined regular wavelength λ1. When the light having the wavelength λ1 is incident thereon as a position observing light, reflection lights are obtained from all of the discrimination marks. At that time, phase differences Δt1, Δt2,...Δtm (time intervals) between the incident lights and reflection lights are measured so that positions of the respective discrimination marks on the optical passages are observed. The inspection light having a wavelength (for example λ2) corresponding to one of the reflection sections is allowed to enter the optical passage. It is judged whether or not the reflection light is detected by each of the phase differences Δt1, Δt2,...Δtm. When the reflection light of the inspection light having the wavelength λ detected by a certain phase difference, it is determined that the discrimination mark corresponding to the phase difference has the reflection section that reflects the light with the wavelength λ2.

69. 发明专利

JPH08338920A FORMATION OF OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING AND FORMING DEVICE THEREFOR 失效
公开(公告)号：JPH08338920A
公开(公告)日：1996-12-24
申请号：JP8785296
申请日：1996-04-10
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： INOUE SUSUMU , MOBARA MASAICHI , IWASHIMA TORU , ITO MASUMI , HATTORI YASUJI
IPC分类号： G02B6/12 , G02B5/18 , G02B6/00 , G02B6/02 , G02B6/13
摘要： PURPOSE: To provide a forming device for optical waveguide type diffraction gratings having diversified reflection characteristics. CONSTITUTION: An optical fiber 1 has a core added with Ge and the refractive index of its core part increases when the core part is irradiated with light of a wavelength about 240nm. A UV laser beam 2 having such wavelength is bisected by a beam splitter 3 and the flank of the optical fiber 1 is irradiated with the respective beams via first and second masks 6, 7 from mirrors 4, 5. The bisected laser beams interfere with each other in the core part of the optical fiber 1 and the core part is irradiated with the interference fringes. The first and second masks 6, 7 have the transmission characteristics of the transmittance of light distributing with arbitrary sizes and changing shapes in a longitudinal direction and independently control the modulation quantity distribution and average refractive index distribution along the longitudinal direction of the diffraction gratings formed on the optical fiber 1.

70. 发明专利

JPH08286072A OPTICAL FIBER COUPLER AND ITS PRODUCTION AND OPTICAL COMMUNICATION SYSTEM 失效
公开(公告)号：JPH08286072A
公开(公告)日：1996-11-01
申请号：JP9055995
申请日：1995-04-17
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HATTORI YASUJI , INOUE SUSUMU
IPC分类号： G02B6/42 , G02B5/18 , G02B6/293 , H04B10/00 , H04B10/077 , H04B10/24
摘要： PURPOSE: To obtain an optical fiber coupler with which the interference of signal light hardly occurs by providing the above optical fiber coupler with a fiber type diffraction grating part which reflects light of one wavelength band and allows the transmission of light in another wavelength band. CONSTITUTION: This optical fiber coupler has an optical fiber 11 and an optical fiber 12 connected via a distribution coupling mechanism 3 to the intermediate part of this optical fiber 11. Fiber type diffraction gratings 21 and 22 respectively varying in reflection wavelength bands are imparted to the respective output sides of the optical fibers 11 and 12. The optical fibers 11, 12 are the optical fibers of quartz glass formed by doping germanium oxide in their cores. The diffraction grating 21 shuts off the wavelength band of the light signal passing the diffraction grating 22 and the diffraction grating 22 shuts off the wavelength band of the light signal passing the diffraction grating 21. The signal light does not interfere between a port 1 and a port 2 any more. An optical communication system free from crosstalks is thus constituted.

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