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    PRODUCTION OF OPTICAL FIBER SHEET
    1.
    发明专利
    PRODUCTION OF OPTICAL FIBER SHEET 失效

    公开(公告)号：JPS5821210A

    公开(公告)日：1983-02-08

    申请号：JP12037481

    申请日：1981-07-30

    Applicant: FUJITSU LTD

    Inventor： OKAMURA KOUJI ,  GOTOU JIYUNJIROU ,  TATSUTA TAKASHI

    IPC: C03B37/00 ,  C03B37/028 ,  G02B6/04

    Abstract: PURPOSE:To obtain a sheet having good dimensional accuracy of the spaces between respective optical fiber strands by juxtaposing plural pieces of preformed optical fiber base aterials, attaching cladding members on both sides of the juxtaposed base material group with said group in-between and stretching the same into one body under heating. CONSTITUTION:Plural pieces of slender bar-like optical fiber base materials 1 made by stretching base materials beforehand to about 8mm. outside diameter are juxtaposed in parallel that tight contact with each other. Plates 2, 2' of, for example, ''Vycor '' glass having a softening temp. lower than that of the materials 1 and a coefft. of thermal expansion nearly equal to that of said materials are attached on both sides along the juxtaposing direction and both ends of the plates 2, 2' are melt stuck, whereby a base material group 11 is produced. With one end part of the group 11 held supported, the other end part is fed into a heating furnace where said part is stretched and drawn out successively to one body under heating, whereby a long sized optical fiber sheet 4 having prescribed thickness, width and good accuracy in the spaces between the respective core layers 1a-1h is manufactured easily and efficiently.

    MANUFACTURING OF SELF-FOCUSING OPTICAL FIBER
    2.
    发明专利
    MANUFACTURING OF SELF-FOCUSING OPTICAL FIBER 失效

    公开(公告)号：JPS57191242A

    公开(公告)日：1982-11-25

    申请号：JP7828681

    申请日：1981-05-22

    Applicant: FUJITSU LTD

    Inventor： TSUKAMOTO MAKOTO ,  TATSUTA TAKASHI

    IPC: C03B37/018 ,  G02B6/00

    Abstract: PURPOSE:To manufacture a self-focusing optical fiber having excellent transmission characteristics over a wide wavelength range, by interrupting the feed of the raw material gas for the formation of glass layer after deposition of each layer of the reaction product forming a glass layer, and introducing only the gas containing dopant for the control of the refractive index into the hollow glass tube. CONSTITUTION:The raw material gas for forming a glass layer and the dopant- containing gas are introduced into the hollow glass tube 1 from the raw material evaporator 3 and the dopant evaporator 4 respectively at predetermined rates, and the glass tube 1 is heated with the heating means 2 to effect the chemical reaction of the mixed gas and deposit one layer of the reaction product in the glass tube 1. The introduction of the raw material gas from the raw material evaporator 3 is interrupted, and only the dopant-containing gas is introduced into the tube to form the first glass layer. The similar procedures are repeated to deposit about 50 layers of glass each having different content of dopant for the control of the refractive index, i.e. having higher refractive index than the preceding layer.

    MANUFACTURE OF OPTICAL FIBER
    7.
    发明专利
    MANUFACTURE OF OPTICAL FIBER 失效

    公开(公告)号：JPS57160933A

    公开(公告)日：1982-10-04

    申请号：JP4365281

    申请日：1981-03-24

    Applicant: FUJITSU LTD

    Inventor： OKAMURA KOUJI ,  TATSUTA TAKASHI

    IPC: C03B37/027 ,  G02B6/00

    Abstract: PURPOSE:To manufacture an optical fiber of high strength by formng a rodlike base material for an optical fiber compoed of a glass core layer and a glass clad layer which are different from each other in refractive index, putting the base material into a glass tube havig a higher coefft. of thermal expansion than the clad layer, and spinning them. CONSTITUTION:A high silicate glass tube 1 having a coefft. of thermal expansion higher than quartz glass is supported with a holding arm 7 conncted to to a support section 5 which is freely movable in the vertical direction. A rodlike quartz base material 2 for an optical fiber composed of a core layer and a clad layer having a refractive index lower than the core layer is put into the tube 1, and the uncovered end of the material 2 is supported with a holding arm 4 connected to a movable support section 6. By lowering the sections 5, 6 simultaneously and perpendicularly, the tube 1 and the material 2 are fed into the core tube 11 of a heating furnace 10, and they are melted by heating and unitedly spun at a prescribed drawing speed in succession to manufacture an optical fiber 3 coated with a high silicate glass layer.

    Manufacture of optical fiber bundle
    8.
    发明专利
    Manufacture of optical fiber bundle 失效
    光纤组件的制造

    公开(公告)号：JPS5773703A

    公开(公告)日：1982-05-08

    申请号：JP14983080

    申请日：1980-10-24

    Applicant: Fujitsu Ltd

    Inventor： GOTOU JIYUNJIROU ,  OKAMURA KOUJI ,  TATSUTA TAKASHI

    IPC: C03B37/012 ,  C03B37/028 ,  C03B37/15 ,  G02B6/04 ,  G02B6/06

    CPC classification number: C03B37/15

    Abstract: PURPOSE:To form an optical fiber bundle having superior transmission characteristics, by using high silicic acid glass having a low softening temperature and excellent workability for the sheath layer of an optical thin rod and a bundling glass pipe in the manufacture of an optical fiber bundle by bundling many optical thin rods in one body. CONSTITUTION:Around an optical fiber consisting of a core 21 and a cladding material 22, a sheath layer 1 of high silicic acid glass (e.g. Vycor glass) having a lower softening point than quartz glass and excellent workability is provided to form an optical thin rod 3. Into a bundling glass pipe 31 made of silicic acid glass of the same material with the said sheath layer 1, optical thin pipes 3 are arrayed and inserted, and then made solid by being heated by a heating means (e.g. oxyhydrogen burner) 32 moving in its lengthwise direction to be made one body, thus obtaining an optical thin rod bundle which does not contain any air bubble.

    Abstract translation: 目的：为了形成具有优良传播特性的光纤束，通过在光纤束的制造中使用具有低软化温度的高硅酸玻璃和用于光纤和护套玻璃管的鞘层的优异的加工性能 将许多光学细棒捆绑在一体。 构成：围绕由芯21和包层材料22组成的光纤，提供具有比石英玻璃软化点低的高硅酸玻璃（例如，Vycor玻璃）的鞘层1和优异的可加工性，以形成光学薄棒 3.将由与所述护套层1相同材料的硅酸玻璃制成的捆扎玻璃管31排列并插入，然后通过加热装置（例如氢氧燃烧器）32加热而固化 沿其长度方向移动以制成一体，从而获得不含任何气泡的光学细棒束。

    Image pickup optical system
    9.
    发明专利
    Image pickup optical system 失效
    图像拾取光学系统

    公开(公告)号：JPS5772118A

    公开(公告)日：1982-05-06

    申请号：JP14863880

    申请日：1980-10-22

    Applicant: Fujitsu Ltd

    Inventor： OKAMURA KOUJI ,  GOTOU JIYUNJIROU ,  TATSUTA TAKASHI

    IPC: F27D21/02 ,  G02B23/26

    CPC classification number: G02B23/26

    Abstract: PURPOSE:To make the observation of high temp. objects easy and sure by inserting a rod lens of a quartz material and bundled fibers in a cylindrical tube of a quartz material, and adjusting their position then fixing these to the tube. CONSTITUTION:A rod lens 1 of a quartz material and bundle fibers 2 of a quartz material are inserted into a cylindrical tube 3 of a quartz material, and the position of an image pickup optical system 10 is adjusted by selecting the distance L in such a way that the image by the lens 1 is formed on the end faces of the fibers 2. Upon ending of this adjustment the lens 1 and the fibers 2 are fixed to the tube 3 by heating the outsie circumference of the tube 3, then the observation of the high temp. objects in a furnace or the like is accomplished easily and surely.

    Abstract translation: 目的：观察高温。 通过将石英材料的棒状透镜和捆扎的纤维插入石英材料的圆柱形管中，并且调整它们的位置，然后将它们固定到管上，容易且确定的物体。 构成：将石英材料的棒状透镜1和石英材料的束状纤维2插入石英材料的圆筒形管3中，并且通过选择这样的距离L来调整摄像光学系统10的位置 透镜1的图像形成在光纤2的端面上的方式。当结束该调整时，透镜1和光纤2通过加热管3的外周而固定到管3，然后观察 的高温 炉子等中的物体容易且可靠地实现。

    Manufacture of optical fiber flux
    10.
    发明专利
    Manufacture of optical fiber flux 失效
    光纤通道的制造

    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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