BR8201562A - Fibra;guia de ondas oticas;processo de fabricacao;formacao e manufatura de forma preliminar de guias de ondas oticas - Google Patents

Fibra;guia de ondas oticas;processo de fabricacao;formacao e manufatura de forma preliminar de guias de ondas oticas

Info

Publication number
BR8201562A
BR8201562A BR8201562A BR8201562A BR8201562A BR 8201562 A BR8201562 A BR 8201562A BR 8201562 A BR8201562 A BR 8201562A BR 8201562 A BR8201562 A BR 8201562A BR 8201562 A BR8201562 A BR 8201562A
Authority
BR
Brazil
Prior art keywords
optical waves
fiber
manufacture
manufacturing process
guides
Prior art date
Application number
BR8201562A
Other languages
English (en)
Inventor
Michael Gregg Blankenship
Donald Bruce Keck
Arnab Sarkar
Original Assignee
Corning Glass Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/249,022 external-priority patent/US4360371A/en
Priority claimed from US06/248,947 external-priority patent/US4415230A/en
Priority claimed from US06/253,224 external-priority patent/US4395270A/en
Application filed by Corning Glass Works filed Critical Corning Glass Works
Publication of BR8201562A publication Critical patent/BR8201562A/pt

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/105—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type having optical polarisation effects
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C03B37/01217—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube for making preforms of polarisation-maintaining optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01466—Means for changing or stabilising the diameter or form of tubes or rods
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01486—Means for supporting, rotating or translating the preforms being formed, e.g. lathes
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C03B37/01853—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
    • C03B37/01869—Collapsing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/02—Pure silica glass, e.g. pure fused quartz
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
    • C03B2201/10—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
    • C03B2201/28—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with phosphorus
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/40—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn
    • C03B2201/42—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn doped with titanium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/12—Non-circular or non-elliptical cross-section, e.g. planar core
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
    • C03B2203/31—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres by use of stress-imparting rods, e.g. by insertion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
BR8201562A 1981-03-30 1982-03-22 Fibra;guia de ondas oticas;processo de fabricacao;formacao e manufatura de forma preliminar de guias de ondas oticas BR8201562A (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US06/249,022 US4360371A (en) 1981-03-30 1981-03-30 Method of making polarization retaining single-mode optical waveguide
US06/248,947 US4415230A (en) 1981-03-30 1981-03-30 Polarization retaining single-mode optical waveguide
US06/253,224 US4395270A (en) 1981-04-13 1981-04-13 Method of fabricating a polarization retaining single-mode optical waveguide

Publications (1)

Publication Number Publication Date
BR8201562A true BR8201562A (pt) 1983-02-08

Family

ID=27400167

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8201562A BR8201562A (pt) 1981-03-30 1982-03-22 Fibra;guia de ondas oticas;processo de fabricacao;formacao e manufatura de forma preliminar de guias de ondas oticas

Country Status (12)

Country Link
EP (3) EP0145030A3 (pt)
JP (1) JP2750345B2 (pt)
KR (1) KR890000331B1 (pt)
AU (1) AU546930B2 (pt)
BR (1) BR8201562A (pt)
CA (1) CA1177297A (pt)
DE (1) DE3272823D1 (pt)
DK (1) DK155474C (pt)
ES (1) ES8302919A1 (pt)
FI (1) FI81209C (pt)
MX (1) MX156655A (pt)
NO (1) NO164139C (pt)

Families Citing this family (29)

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EP0098102B1 (en) * 1982-06-25 1987-02-04 National Research Development Corporation Method of making optical fibre preforms and optical fibre preform
US4529426A (en) * 1983-07-22 1985-07-16 At&T Bell Laboratories Method of fabricating high birefringence fibers
FR2551885B1 (fr) * 1983-09-13 1986-01-24 Thomson Csf Procede de fabrication d'une fibre optique multicoeurs et fibres optiques obtenues par un tel procede
US4630889A (en) * 1983-11-09 1986-12-23 Polaroid Corporation Polarization locked optical fiber and method
US4561871A (en) * 1983-12-27 1985-12-31 Corning Glass Works Method of making polarization preserving optical fiber
GB8400535D0 (en) * 1984-01-10 1984-02-15 Standard Telephones Cables Ltd Optical fibre manufacture
JPS6163538A (ja) * 1984-09-04 1986-04-01 Kokusai Denshin Denwa Co Ltd <Kdd> フッ化物ガラスの精製法
GB8612189D0 (en) * 1986-05-20 1986-07-16 Birch R D Optical fibre apparatus
US4781424A (en) * 1986-07-28 1988-11-01 Nippon Telegraph And Telephone Corporation Single mode channel optical waveguide with a stress-induced birefringence control region
JPS6360411A (ja) * 1986-09-01 1988-03-16 Hitachi Cable Ltd 偏波面保存光フアイバ
DE3641285A1 (de) * 1986-12-03 1988-06-09 Schott Glaswerke Verfahren zur messung von (alpha) und ss-strahlen geringer intensitaet
US4824455A (en) * 1987-04-28 1989-04-25 Hughes Aircraft Company Polarization preserving optical fiber and method of manufacturing
US4904052A (en) * 1987-04-28 1990-02-27 Hughes Aircraft Company Polarization preserving optical fiber and method of manufacturing
JPH0718964B2 (ja) * 1987-06-29 1995-03-06 日本電信電話株式会社 集積光デバイスおよびその製造方法
DE68912288T2 (de) * 1988-12-09 1994-05-05 Alcatel Nv Verfahren zum Verarbeiten einer Vorform für polarisationserhaltende optische Fasern.
FR2649690B1 (fr) * 1989-07-11 1994-01-28 Cie Generale D Electricite Procede de fabrication de preformes pour fibres optiques sans symetrie de revolution
FR2650584B1 (fr) * 1989-08-02 1993-12-17 Cie Generale D Electricite Procede de fabrication d'une fibre optique a gaine dopee
US5180410A (en) * 1990-07-30 1993-01-19 Corning Incorporated Method of making polarization retaining fiber
US5904762A (en) * 1997-04-18 1999-05-18 Cabot Corporation Method of making a multi-phase aggregate using a multi-stage process
US5895522A (en) * 1997-08-12 1999-04-20 Cabot Corporation Modified carbon products with leaving groups and inks and coatings containing modified carbon products
US6243522B1 (en) * 1998-12-21 2001-06-05 Corning Incorporated Photonic crystal fiber
EP1181595A1 (en) * 1999-03-30 2002-02-27 Crystal Fibre A/S Polarisation preserving optical fibre
JP3986842B2 (ja) * 2001-07-26 2007-10-03 株式会社フジクラ ノンゼロ分散シフト光ファイバ用光ファイバ母材の製法
JP3833621B2 (ja) 2002-03-15 2006-10-18 株式会社フジクラ 偏波保持光ファイバ
CA2948666C (en) 2005-02-28 2018-01-16 Weatherford Technology Holdings, Llc Polarization controlling optical fiber preform and preform fabrication methods
US8326037B1 (en) 2005-11-23 2012-12-04 Matrox Electronic Systems, Ltd. Methods and apparatus for locating an object in an image
US8526773B2 (en) * 2010-04-30 2013-09-03 Corning Incorporated Optical fiber with differential birefringence mechanism
JP2016148806A (ja) * 2015-02-13 2016-08-18 株式会社中原光電子研究所 偏波保持光ファイバ、キャピラリ及びコネクタ
DK3136143T3 (en) 2015-08-26 2020-05-18 Max Planck Gesellschaft Hollow-Core Fibre and Method of Manufacturing Thereof

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US3278283A (en) * 1963-04-12 1966-10-11 American Optical Corp Method of making light-conducting optical component
US3535017A (en) * 1968-01-08 1970-10-20 Bell Telephone Labor Inc Optical fiber waveguide structures
US3678328A (en) * 1968-11-01 1972-07-18 Bendix Corp Channel multiplier assembly and method of manufacture thereof
US3823995A (en) * 1972-03-30 1974-07-16 Corning Glass Works Method of forming light focusing fiber waveguide
JPS50161255A (pt) * 1974-06-18 1975-12-27
US4028082A (en) * 1976-02-10 1977-06-07 American Optical Corporation Method of making artificial intraocular lenses with holes
JPS52131735A (en) * 1976-04-28 1977-11-04 Sumitomo Electric Ind Ltd Manufacture of optical fiber
US4204851A (en) * 1977-06-23 1980-05-27 Corning Glass Works Directing glass forming constituents against a lateral surface parallel to the axis of rotation of a starting member to form a monolithic blank for an optical waveguide
NL193330C (nl) * 1978-01-13 1999-06-02 Western Electric Co Optische golfleider en werkwijze voor het vervaardigen daarvan.
US4165223A (en) * 1978-03-06 1979-08-21 Corning Glass Works Method of making dry optical waveguides
US4184859A (en) * 1978-06-09 1980-01-22 International Telephone And Telegraph Corporation Method of fabricating an elliptical core single mode fiber
US4229197A (en) * 1978-06-12 1980-10-21 International Telephone And Telegraph Corporation Method for making multiple optical core fiber
US4243298A (en) * 1978-10-06 1981-01-06 International Telephone And Telegraph Corporation High-strength optical preforms and fibers with thin, high-compression outer layers
DE2909390A1 (de) * 1979-03-09 1980-09-18 Siemens Ag Verfahren zur herstellung einer multikanal-lichtleitfaser
DE2930791A1 (de) * 1979-07-28 1981-02-12 Licentia Gmbh Verfahren zur herstellung einer lichtleitfaser
JPS5624306A (en) * 1979-08-03 1981-03-07 Sumitomo Electric Ind Ltd Production of optical fiber having elliptical core
US4426129A (en) * 1980-01-11 1984-01-17 Hitachi, Ltd. Optical fiber and method of producing the same
GB2096788B (en) * 1981-01-17 1984-12-19 Nippon Telegraph & Telephone Single-polarization single-mode optical fibers

Also Published As

Publication number Publication date
NO164139C (no) 1990-08-29
JP2750345B2 (ja) 1998-05-13
CA1177297A (en) 1984-11-06
KR890000331B1 (ko) 1989-03-14
FI821088A0 (fi) 1982-03-29
EP0145031B1 (en) 1988-05-04
MX156655A (es) 1988-09-22
FI821088L (fi) 1982-10-01
AU546930B2 (en) 1985-09-26
DK122582A (da) 1982-10-01
DE3272823D1 (en) 1986-10-02
ES510635A0 (es) 1983-02-01
NO821043L (no) 1982-10-01
ES8302919A1 (es) 1983-02-01
EP0145031A3 (en) 1985-07-10
EP0061901A1 (en) 1982-10-06
EP0145031A2 (en) 1985-06-19
FI81209B (fi) 1990-05-31
AU8192182A (en) 1982-10-07
DK155474C (da) 1989-10-09
EP0145030A3 (en) 1985-07-10
JPH06174957A (ja) 1994-06-24
EP0061901B1 (en) 1986-08-27
DK155474B (da) 1989-04-10
EP0145030A2 (en) 1985-06-19
NO164139B (no) 1990-05-21
FI81209C (fi) 1990-09-10
KR830009492A (ko) 1983-12-21

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