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公开(公告)号：JPS5778729A
公开(公告)日：1982-05-17
申请号：JP15400780
申请日：1980-10-31
Applicant: Fujitsu Ltd
Inventor： NAKAMURA OSAMU , TSUKAMOTO MAKOTO
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公开(公告)号：JPS5751139A
公开(公告)日：1982-03-25
申请号：JP12543180
申请日：1980-09-09
Applicant: Fujitsu Ltd
Inventor： OKAMURA KOUJI , GOTOU JIYUNJIROU , NAKAMURA OSAMU , TSUKAMOTO MAKOTO
IPC: C03B37/018 , G02B6/00
CPC classification number: C03B37/01815 , C03B2207/66 , C03B2207/70
Abstract: PURPOSE:To obtain the titled uniform base material having a core glass layer of uniform thickness in depositing a glass layer on the inner surface a reactor tube by th modified (internal) CVD method, by carrying out the transferrig operation of a burner for heating the reactor tube to increase the operation at a gas introductory end with a small amount of glass deposited. CONSTITUTION:A raw material gas for forming glass and a reaction gas are introduced into a quartz reactor tube 11, and a heating burner 12 is reciprocated from a gas introductory end 13 of the reactor tube 11 to a distance (a1) near the introductory end 13. The burner 12 is then reciprocated to a distance (a2) while introducing the raw material gas and reaction gas continuously. The distance is then lengthened gradually, and the burner 12 is reciprocated to a distance (a5). The operation of reciprocating the heating burner 12 in distances (a1) to (a5) successively by the method is taken as one cycle of transfer, and the transfer cycles are repeated plural times to transfer the burner 12. A core glass layer is deposited in a uniform thickness on the inner surface of the reactor tube 11 to give the aimed base material for an optical fiber.
Abstract translation: 目的：为了获得具有均匀厚度的芯玻璃层的标准均匀基材，通过改进的（内部）CVD方法在反应器管内表面上沉积玻璃层，通过进行用于加热的燃烧器的转移操作 反应器管，以增加在气体导入端的操作，同时少量玻璃沉积。 构成：将用于形成玻璃和反应气体的原料气体引入石英反应器管11中，并且加热燃烧器12从反应器管11的气体导入端13往复运动到在介绍端附近的距离（a1） 然后连续地引入原料气体和反应气体，使燃烧器12往复移动一定距离（a2）。 然后将距离逐渐延长，并且燃烧器12往复运动到距离（a5）。 将加热燃烧器12的距离（a1）〜（a5）依次通过该方法进行往复操作，作为一个循环的循环，并且重复多次以转移燃烧器12.将芯玻璃层沉积在 在反应器管11的内表面上具有均匀的厚度，以给出用于光纤的目标基材。
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公开(公告)号：JPS5746210A
公开(公告)日：1982-03-16
申请号：JP12364880
申请日：1980-09-05
Applicant: Fujitsu Ltd
Inventor： NAKAMURA OSAMU , GOTOU JIYUNJIROU , TATSUTA TAKASHI
IPC: C03B37/012 , G02B6/04 , G02B6/06 , G02B5/17
CPC classification number: G02B6/06
Abstract: PURPOSE:To easily bind an optical fiber flux for image transmission, consisting of silica compound glass, with high accuracy, by means of high-frequency induction heating. CONSTITUTION:A beltlike fiber aggregate is formed, by winding it up to an array drum, applying an adhesive agent thinly on a prescribed part, binding it temporarily and after that, cutting it off, it is piled on a forming jig 4 made of graphite, whose section is recessed, is stored, on which a cover body 5 made of graphite is placed, and pressure is put in the direction as indicated with an arrow A. A high- frequency induction coil 6 is placed in the outside circumference of the forming jig 4 containing the cover body 5, high frequency power is applied, and when induction heating is executed to a high temperature, end parts of the optical fiber flux are heated, are made to adhere to each other, and are formed in one body. In order to prevent thermal oxidation of the forming jig, it is executed in the atmosphere of inert gas such as gaseous nitrogen, etx. This method is especially suitable for manufacture of a heat resistance optical fiber flux for observing a high heating part, etc. of various high heating apparatuses, etc.
Abstract translation: 目的：通过高频感应加热，以高精度，轻松地结合由二氧化硅复合玻璃组成的图像传输光纤通量。 构成：通过将带状纤维聚集体卷绕到阵列鼓上，将粘合剂薄薄地施加在规定的部分上，暂时粘合，然后将其切割，将其堆积在由石墨制成的成形夹具4上 储存在其上放置有由石墨制成的盖体5并且沿箭头A所示的方向施加压力的高压感应线圈6放置在其上， 包含盖体5的成形夹具4，施加高频电力，并且当高温进行感应加热时，光纤通量的端部被加热而彼此粘附，并形成在一体 。 为了防止成型夹具的热氧化，在气态氮等惰性气体气氛中进行。 该方法特别适用于制造用于观察各种高温加热装置等的高加热部等的耐热光纤通量
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公开(公告)号：JPS56111816A
公开(公告)日：1981-09-03
申请号：JP1504680
申请日：1980-02-08
Applicant: FUJITSU LTD
Inventor： GOTOU JIYUNJIROU , AKAMATSU TAKESHI , NAKAMURA OSAMU , OKAMURA KOUJI , TATSUTA TAKASHI
Abstract: PURPOSE:To obtain an optical fiber bundle of high precision without a shift in arrangement position by forming the bundle with the cross section area greater at both the ends than at the center part, by providing a plurality of bundles in parallel, and by fixing both the ends in one body. CONSTITUTION:An optical fiber bundle is composed of the assembly of optical fiber wires 31A, 31B, 31C... of 8mumphi, for example, in the diameter of a core glass layer at both ends and of 10mumphi in the diameter of a cladding glass layer having an unrequired-light absorbing glass layer covered around the outer circumference, and diameter l1 of both end surfaces is about 2mumphi. Further, diameter l2 of the intermediate part between the end surfaces of the optical fiber bundle is made thin by being spinned and the cross section area of the intermediate part is made less than those of both the end parts to obtain the flexible structure. Consequently, there is no shift in position between both the end surfaces of the fiber bundle and high reliability can be obtained.
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公开(公告)号：JPS56111815A
公开(公告)日：1981-09-03
申请号：JP1504580
申请日：1980-02-08
Applicant: FUJITSU LTD
Inventor： NAKAMURA OSAMU , OKAMURA KOUJI
IPC: A61B1/00 , C03B37/018 , C03B37/028 , G02B6/04 , G02B23/26
Abstract: PURPOSE:To obtain a long-sized light guide which has flexibility even after elongation with its manufacture process remarkably simplified, by forming a fusion- bonding proventive layer while the circumference of one end of an intermediate assembly is left, and by fusing and bonding in a body the part where the said layer is not formed by bundling those intermediate assemblies. CONSTITUTION:Materials are arrayed and thermally elongated to obtain an intermediate assembly and around this assembly, a fusion-bonding preventive film of high-melting point metal, such as molybdenum and indium, metal oxide, such as titanium oxide and magnesium oxide, etc., is bonded by vacuum deposition, chemical vapor deposition, etc. A plurality of the intermediate assemblies having the coating films bonded are arrayed and elongated finally. Consequently, the glass surface exposure parts of the intermediate assemblies are mutually bonded by fusion and the fusion bonding is prevented at the part of the preventive coating film. Therefore, a composite fiber bundle has flexibility on the whole and no disorder of respective fiber at both the ends.
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Patent Agency Ranking
公开(公告)号：JPS56111406A
公开(公告)日：1981-09-03
申请号：JP1504280
申请日：1980-02-08
Applicant: FUJITSU LTD
Inventor： NAKAMURA OSAMU , OKAMURA KOUJI
Abstract: PURPOSE:To measure the size of optical fiber easily without interrupting the manufacture by detecting light transmitted via a core and cladding material, by irradiating an optical fiber wire with light from its side via resin in a resin storage chamber during the manufacture of optical fiber. CONSTITUTION:Glass rod 31 for core formation and glass rod 32 for cladder formation are inserted into core glass melting pot 11 and clad melting pot 12 respectively and heated in heating furnaces 13 for spinning from bottom parts A of the melting pots as a constant speed to obtain optical fiber wire 14. Wire 14 is led into silicone resin storage chamber 17 via line-diameter measurer 15 using laser light. Wire 14 is irradiated with light from light source lamp 20 via passage 18A for light transmission and the linear shadow is received TV camera 22 via lens 21 in the passage for light transmission to receive the image by picture receiver 23. Diameter 34 of the core and diameter 33 of the cladding layer are projected clearly, so that the size of the optical fiber can easily be measured without interrupting the manufacture of the optical fiber.
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公开(公告)号：JPS5663834A
公开(公告)日：1981-05-30
申请号：JP13737279
申请日：1979-10-23
Applicant: FUJITSU LTD
Inventor： NAKAMURA OSAMU , NISHIJIMA YOSHINDO
IPC: C03B37/023 , C03B37/027 , G02B6/00
Abstract: PURPOSE:To control the dimensions of core and clad layers with accuracy by bringing a plurality of clad layer forming glass rods into contact with the outside of a core forming glass rod and melt spinning them while bringing the clad layer forming glass rods into contact with each other. CONSTITUTION:A suitable number of clad layer forming glass rods 2 of a predetermined diameter are brought into contact with the outside of core forming glass rod 1 of a predetermined diameter so that rods 2 contact with each other. They are supported by chuck 5 and fed into melting and spinning quartz crucible 3 with feed mechanism 6 at a predetermined feeding speed. The temp. of heating furnace 4 is adjusted so that a uniform temp. part of about 950 deg.C optimum temp. is reduced as small as possible, e.g. to about 1cm width in the longitudinal direction of crucible 3 at crucible bottom B for spinning molten glass and the temp. gradients of parts before and behind the uniform temp. part are made sharp. Thus, the ratio of core to clad layer diameter can be controlled correctly.
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公开(公告)号：JPS55121923A
公开(公告)日：1980-09-19
申请号：JP2955279
申请日：1979-03-13
Applicant: FUJITSU LTD
Inventor： OZEKI TOMOMASA , KAWABATA YOSHIO , GOTOU JIYUNJIROU , NAKAMURA OSAMU
Abstract: PURPOSE:To produce stable quality, contamination-free, optical transmission glass by a method wherein plural positive metal compounds are hydrolyzed in liquid phase reaction, water and easily vaporizable compound are removed, and is glassified by melting with heat. CONSTITUTION:Cock at reservoir 1 is opened to provide a specified quantity of POCl3 in a quantity container 11. The cock 6 is closed, and clean innert gas is sent from pressure gas pipe connected to the container 11 so that the content is supplied to the reaction container 17. Similarly, a specified quantity of GaCl3 aqueous solution in reservoir 4 is supplied to the container 17. Then, POCl3 and water reaction occurs to generate heat, which is cooled by ice I in cooler 18. Liquid is stirred by bubbling gas from gas inlet pipe 19. Next, each specified quantity of GeCl4 in reservoir 2 and SiCl4 in reservoir 3 are supplied to the con tainer 17. This causes the content to be withish turbid and to form gel. Pure water is supplied from reservoir 5 to effect sufficient hydrolysis reaction. The container 17 is moved in water bath 21 and heated. The generated HCl and water are removed, then sintered and melted in gas phase chemical reaction.
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公开(公告)号：JPS53110860A
公开(公告)日：1978-09-27
申请号：JP2639777
申请日：1977-03-09
Applicant: FUJITSU LTD
Inventor： NAKAMURA OSAMU , TSUKAMOTO MAKOTO , ROKUSHIYA KIYOSHI
Abstract: PURPOSE:To perform coupling of optical fibers efficiently by using plane-convex lenses whose convex face is made aspherical and other face a plane including focus.
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公开(公告)号：JPS5377640A
公开(公告)日：1978-07-10
申请号：JP15448676
申请日：1976-12-21
Applicant: FUJITSU LTD
Inventor： OKADA HISANAO , NAKAMURA OSAMU
Abstract: PURPOSE:To detect the degree and direction of deviation and perform rapid axial alignment by mechanically vibrating one of optical fibers whose end faces are opposed to each other, detcting the phase of the a.c. components of the same period as said vibration and comparing the same with vibration phase.
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