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1. 发明专利

JPS6421337A MEASUREMENT OF EDGE FACE ANGLE OF OPTICAL FIBER 失效
公开(公告)号：JPS6421337A
公开(公告)日：1989-01-24
申请号：JP17730687
申请日：1987-07-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO YASUYUKI , ISHIKURA AKIHIKO , MIYAUCHI MITSURU
IPC分类号： G01M11/00 , G01B11/26 , G02B6/00
摘要： PURPOSE:To enable instantaneous measurement of an edge face angle of an optical fiber using a handy device, by irradiating an end face of an optical fiber with an illumination light condensing on the edge face of the fiber to measure intensity of the reflected light thereof. CONSTITUTION:An optical fiber 1 cut is sandwiched securely with a cover clamp 11 and an optical fiber clamp 12 in such a manner that the length-wise axis of the optical fiber aligns the axis of an illumination light 3 with a V groove 6 for fixing the optical fiber. The illumination light 3 from a light source 2 for illumination passes through a half mirror 10 for deflecting a light power separately in two ways to be condensed near the edge face of the optical fiber 1 to be measured with a lens 9. Light 4 reflected by the edge face of the fiber travels reverse to the illumination light 3 expanding in the beam diameter thereof and reaches the half mirror 10. The reflected light is separated with a half mirror 10 into two parts and the end face angle theta of the optical fiber is determined by measuring the intensity I of light with a photodetector 5.

2. 发明专利

JPS63192005A CORE SUPPLY DEVICE FOR OPTICAL FIBER 失效
公开(公告)号：JPS63192005A
公开(公告)日：1988-08-09
申请号：JP2517787
申请日：1987-02-05
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SASAKI KAZUMI , SUDA HIROHISA , OSATO KAZUKUNI , YAMADA TAKESHI , MIYAUCHI MITSURU , KATAGIRI TOSHIAKI , TACHIKURA MASAO , SATO MAKOTO
IPC分类号： G02B6/24 , G02B6/255
摘要： PURPOSE:To simplify the structure and to miniaturize the device by mechanically interlocking movement and opening/closing of upper and lower rolls with the motion of a core moving arm. CONSTITUTION:When a core moving arm 76 is moved backward, a contact rod 82 is pushed and the contact rod 82 pushes a projection 50 to move a slide base 20 backward. A cam block 28 falls by the force of a tension spring 42, and the space between upper and lower rolls 34 and 36 is closed to catch one core 56 between them. The lower roll 36 is rotated to feed the core 56, and the core 56 is grasped with a core chuck 78 after the length of the core 56 is determined as fixed dimensions, and the core moving arm 76 is moved forward, and then, the slide base 20 is automatically moved forward by the action of a tension sprig 48, and the space between upper and lower rolls 34 and 36 is opened. Hereafter, this operation is repeated. Thus, the number of motors is reduced to simplify the structure.

3. 发明专利

JPS6370206A V-GROOVE CONNECTOR FOR OPTICAL FIBER 失效
公开(公告)号：JPS6370206A
公开(公告)日：1988-03-30
申请号：JP21270586
申请日：1986-09-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAZAKI SATORU , MATSUMOTO MICHITO , MIYAUCHI MITSURU
IPC分类号： G02B6/24
摘要： PURPOSE:To connect single-mode fibers which differ in external diameters with low loss by pressing down the optical fiber with a large diameter in the V groove of a projection part of an upper substrate and thus aligning their optical axes. CONSTITUTION:A recessed part 1b of several mm in depth is formed at right angles to the formation direction of the V groove 1a of a lower substrate 1, and part of the V groove 1a is open spatially at the recessed part 1b. When fiber axial alignment is performed, a couple of optical fibers 2 and 3 are set in V grooves 1a of the lower substrate 1 and tips of both optical fibers 2 and 3 are made to contact each other in the middle of the recessed part 1b. Then the upper substrate 4 is fitted and then elastic members 5 and 6 press the optical fibers 2 and 3 into the V grooves 1a of the lower substrate 1 and the external diameter difference between the optical fibers 2 and 3 is absorbed, so that the upper substrate 4 and lower substrate 1 become parallel to each other. Thus, the optical fibers 2 and 3 are easily aligned with each other with low loss by pressing down the upper substrate 4.

4. 发明专利

JPS62203104A SETTING METHOD FOR GAP BETWEEN OPTICAL FIBER END SURFACES 失效
公开(公告)号：JPS62203104A
公开(公告)日：1987-09-07
申请号：JP4403986
申请日：1986-03-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO YASUYUKI , ISHIKURA AKIHIKO , MIYAUCHI MITSURU
IPC分类号： G02B6/24
摘要： PURPOSE:To set an optical fiber end surface gap with high accuracy without using a television camera nor an image processor by moving an optical fiber and extracting the quantity of variation in the electric output of a photodetector which is obtained when an enlarged image on an optical fiber end surface passes by the photodetector. CONSTITUTION:An illuminating means 4 which illuminates the optical fiber to be set almost at right angles to the lengthwise axis of the optical fiber is arranged and a means which enlarges the optical fiber end surface image is provided on the opposite side from the illuminating means 4 across the optical fiber; and the photodetector which has an extremely small surface and detects whether light is intense or not is set where the enlarged image of the optical fiber end surface is formed, and the optical fiber is moved to extract the quantity of variation in the electric output of the photodetector when the enlarged image of the optical fiber end surface passes by the photodetector, thereby detecting the position of the optical fiber end surface and setting the end surface ga. Light from the illuminating device 4 is nearly collimated by a condenser lens 5 to illuminates the optical fiber 3. The image of the optical fiber end surface is enlarged and formed on the photodetector 7 with the extremely small surface through a lens 6.

5. 发明专利

JPS62200211A METHOD FOR MEASURING ANGLE OF END SURFACE OF OPTICAL FIBER 失效
公开(公告)号：JPS62200211A
公开(公告)日：1987-09-03
申请号：JP4156286
申请日：1986-02-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIKURA AKIHIKO , KATO YASUYUKI , MIYAUCHI MITSURU
IPC分类号： G02B6/00 , G01B11/26 , G01M11/00
摘要： PURPOSE:To enable highly accurate measurement within a short time, by performing a specific operation using the length of a light path from the end surface of an optical fiber to the position on an image pickup means to measure the angle of the end surface of the optical fiber. CONSTITUTION:When the axis of optical fiber 1 to be measured in the longitudinal direction is set to an x-axis and the angle formed by the end surface of the optical fiber 1 and the y-axis is set to theta, the illumination light from the illumination light source 2 placed on the x-axis passes through a half mirror 10 to irradiate the end surface of the optical fiber 1. Whereupon, reflected light 4 returns at the angle 2theta with respect to the x-axis. The reflected light 4 is partially reflected by the half mirror 10 to reach the image pickup element 5 placed on an x'-axis parallel to the x-axis and projected to a position P1. The image forming position P1 of light is detected and, when the angle of the end surface of the optical fiber 1 is 0 deg., the distance between position P0 where the light reflected on an image pickup means is formed into an image is measured by image processing and the operation of formula is performed using the length L0 of the light path from the end surface of the optical fiber to the position P0 on the image pickup means to measure the angle theta of the end surface of the optical fiber.

6. 发明专利

JPS62111211A AXIAL ALIGNMENT METHOD FOR CONSTANT POLARIZATION OPTICAL FIBER 失效
公开(公告)号：JPS62111211A
公开(公告)日：1987-05-22
申请号：JP25052285
申请日：1985-11-08
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUGIYAMA YUJI , ODA TAKAHARU , KATO YASUYUKI , MIYAUCHI MITSURU
IPC分类号： G02B6/024 , G02B6/26
摘要： PURPOSE:To axially align constant polarization optical fibers with good accuracy at a low cost by making a light signal from a light exit system incident on both the constant polarization optical fibers, measuring the light power of the linearly polarized waves orthogonal with each other of the transmitted light signal and axially aligning the optical fibers in accordance with the measured value. CONSTITUTION:The light signal L emitted from the light source 13 is successively made incident on a prism 14, the constant polarization optical fiber 1, a matching liquid 3, the constant polarization optical fiber 2, a prism 15, and light power meters 16, 17 in the stage of axially aligning the constant polarization optical fibers 1, 2. The light signal is divided to components Lx, Ly via the prism 15 and said components are inputted to the meters 16, 17. The ends of the fibers 1, 2 are relatively moved in X-, Y-axis directions to align the cores thereof to each other while the light power of the component Lx is kept monitored with the meter 16. The ends of the fibers 1, 2 are relatively rotated in the 0 direction to match the planes of polarization thereof with each other while the light power of the component Ly is kept monitored with the meter 17. The axial alignment is thus executed simply by the inexpensive meter 16.

7. 发明专利

JPS61238004A REMOVER FOR COATING OF OPTICAL FIBER 失效
公开(公告)号：JPS61238004A
公开(公告)日：1986-10-23
申请号：JP7953585
申请日：1985-04-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HAIBARA TADASHI , MATSUMOTO MICHITO , TACHIKURA MASAO , MIYAUCHI MITSURU
IPC分类号： G02B6/00 , G02B6/245 , H02G1/12
摘要： PURPOSE:To prevent an optical fiber core from being applied with unnecessary force by putting the optical fiber core between a couple of movable bodies which are arranged closely to each other at an interval and have blades at mutually opposite parts, ad putting the couple of movable bodies closer to each other and cutting the coating part of the core with the blades. CONSTITUTION:The optical fiber core 1 is placed between guide projections 17 and the movable bodies 10a and 10b are closed against the force of a spring 12. This operation positions the optical fiber core 1 accurately in guide grooves 13a and 13b under the guidance of the guide projections 17. Further, the movable bodies 10a and 10b are applied with force to cut the coating of the fiber core 1 with the blades 14a and 14b, and elastic bodies 16a and 16b deform elastically and are pressed against the periphery of the core 1, so that neither of the blades 14a and 14b flaws the optical fiber 2 because of the presence of semicircular notches 15a and 15b. Then, a sound is generated when abutting parts collide against each other, so an operator confirms the cutting of the coating. Then, the base end side of the core 1 is clamped to slide the movable bodies 10a and 10b as shown by an arrow (a), so that an external coating 4 and an internal coating 3 are drawn out partially with the blades 14a and 14b.

8. 发明专利

JPS61236509A METHOD AND DEVICE FOR WELDING OPTICAL FIBER 失效
公开(公告)号：JPS61236509A
公开(公告)日：1986-10-21
申请号：JP7660585
申请日：1985-04-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： IDE ATSUSHI , MIYAUCHI MITSURU , MATSUMOTO MICHITO , KUBOTA ATSUYOSHI
IPC分类号： G02B6/24 , G02B6/255
摘要： PURPOSE:To heat multicore fibers uniformly and weld then together by clamping optical fiber end parts and inserting a couple of heat-resisting members which limit a heated area before the start of the heating into nearby the heated part. CONSTITUTION:Discharging electrodes 1 and 1', V grooves 2 and 2', heat- resisting members 3 and 3', and fibers 4 and 4' are provided; figure (a) is a plane, figure (b) is a front elevation, and figure (c) is a side elevation. The couple of heat-resisting members 3 and 3 which limit the heated area before the start of the heating are inserted into nearby the heated and allowed to move back from the heated area. When discharging operation is carried out, the heat-resisting members 3 and 3' cover the entire surface including the V grooves 2 and 2' except the fibers 4 and 4'. Thus, a discharged area during the discharging is prescribed and foreign matter is prevented from sticking on the V groove parts 2 and 2'.

9. 发明专利

JPS58158621A MEMBER FOR REINFORCING CONNECTION PART OF OPTICAL FIBER CORE 失效
公开(公告)号：JPS58158621A
公开(公告)日：1983-09-20
申请号：JP4090682
申请日：1982-03-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HAIBARA TADASHI , MIYAUCHI MITSURU , TAKAHASHI KIYOSHI
IPC分类号： G02B6/24 , G02B6/38
摘要： PURPOSE:To form a reinforcement part with high reliability without a special device and preparatory operation even in inferior work environment in a manhole, on a utility pole, etc., by using the reinforcement part coated previously with a two-part adhesive which has long shelf life. CONSTITUTION:Two packages 12 and 12' each having at least one thin and long groove, i.e. 13 and 13' on one surface; one package has the groove surface coated with a main agent of the two-part adhesive and the other package has the groove surface coated with a curing agent 15 for the adhesive. After protection covers 17 and 17' are removed, an optical fiber cores connected by deposition is extended along one groove and the packages are folded so that the adhesive surfaces meet each other. The main agent and curing agent of the two-part adhesive are mixed and curing starts to fix the deposition-connection part of the packages 12 and 12' tightly.

10. 发明专利

JPS58154802A INSTRUMENT FOR PROCESSING TERMINAL OF OPTICAL FIBER CORE 失效
公开(公告)号：JPS58154802A
公开(公告)日：1983-09-14
申请号：JP3663482
申请日：1982-03-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HAIBARA TADASHI , MIYAUCHI MITSURU , MATSUMOTO MICHITO
IPC分类号： B26D3/08 , B26F3/00 , B26F3/02 , G02B6/00 , G02B6/245 , G02B6/25 , H02G1/12
摘要： PURPOSE:To allow the same instrument to remove a coating from an optical fiber core and also cut a strand by forming grooves for holding a coating removing knife edge for the optical fiber core, and a cutting knife edge for the strand, and the core in the main body of an optical fiber core processing instrument. CONSTITUTION:The optical fiber core is fixed in holding grooves 11 and 11'. Then when force is applied to terminal proessing instrument bodies 15 and 15', removing knife edges 9 and 9' cut coatings 2 and 3 and at the same time, the cutting knife edge 10 makes a flaw 16 in the strand 1. Then, as the force to the terminal processing instruments is relaxed, the coating removing knife edges 9 and 9' and cutting knife edge 10 are moved back and when the optical fiber core is held in one hand and the terminal processing instrument bodies 15 and 15' are moved in an axial direction of the optical fiber core, holding parts 12 and 12' moves while holding the coatings 1 and 3 by frictional force, etc., to cut optical fiber strand 1. Thus, the coating removal of the opetical fiber core and the cutting of the strand are carried out by the same instruments.

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