JPS6476931A - Production of refractive index-distributing type lens - Google Patents

Production of refractive index-distributing type lens

Info

Publication number
JPS6476931A
JPS6476931A JP62231848A JP23184887A JPS6476931A JP S6476931 A JPS6476931 A JP S6476931A JP 62231848 A JP62231848 A JP 62231848A JP 23184887 A JP23184887 A JP 23184887A JP S6476931 A JPS6476931 A JP S6476931A
Authority
JP
Japan
Prior art keywords
glass
nozzle
refractive index
lens
fiber
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62231848A
Other languages
Japanese (ja)
Other versions
JPH0572337B2 (en
Inventor
Kiyosumi Fujii
Hideya Ogi
Akira Akazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Sheet Glass Co Ltd
Original Assignee
Nippon Sheet Glass Co Ltd
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
Application filed by Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Priority to JP62231848A priority Critical patent/JPS6476931A/en
Publication of JPS6476931A publication Critical patent/JPS6476931A/en
Publication of JPH0572337B2 publication Critical patent/JPH0572337B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
    • C03B37/023—Fibres composed of different sorts of glass, e.g. glass optical fibres, made by the double crucible technique

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

PURPOSE:To enable the mass production of the title lens of low aberration and a wide aperture angle from a devitrifiable glass by spinning a glass fiber of an coincidal double-layered structure using a specific crucible, subjecting the fiber to ion-exchanging treatment, and removing the sheath glass. CONSTITUTION:The glass fiber-forming unit 10 is composed of the pot zone 11 having the inner chamber 12 and the outer chamber 13 and of the nozzle zone 17 of a desired length where the two zones are arranged in a coincidally double structure. The lens parent glass 20 flows down from the melt pot 14 through the inner chamber 12 into the inner nozzle 17A, while another glass of high devitrification and a similar composition to the core glass for the sheath 21 flows from the outer chamber 13 into the outer nozzle 17B and surrounds the core glass 20 at the meeting point 18. Then, the nozzle 17 is heated up to the temperature of the malted phase of the glass 20 to effect spinning of a glass fiber 22 of a double structure. The glass fibers 22 are cut into a desired length, subjected to ion-exchanging treatment in a molten salt 23 to form a refractive index distribution 24 due to the ion concentration distribution in the cross section of the fibers. Then, the glass fiber is treated with a liquid acid to remove the glass 21 by etching whereby a lens of a refractive index distribution type is obtained.
JP62231848A 1987-09-16 1987-09-16 Production of refractive index-distributing type lens Granted JPS6476931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62231848A JPS6476931A (en) 1987-09-16 1987-09-16 Production of refractive index-distributing type lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62231848A JPS6476931A (en) 1987-09-16 1987-09-16 Production of refractive index-distributing type lens

Publications (2)

Publication Number Publication Date
JPS6476931A true JPS6476931A (en) 1989-03-23
JPH0572337B2 JPH0572337B2 (en) 1993-10-12

Family

ID=16929959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62231848A Granted JPS6476931A (en) 1987-09-16 1987-09-16 Production of refractive index-distributing type lens

Country Status (1)

Country Link
JP (1) JPS6476931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841306A1 (en) * 1996-11-06 1998-05-13 Nippon Sheet Glass Co., Ltd. Glass compositions for core/cladding type distributed index optical element
JP2006154868A (en) * 2006-03-09 2006-06-15 Nippon Sheet Glass Co Ltd Optical fiber with lens function and method for manufacturing the same
US8193108B2 (en) 2004-07-23 2012-06-05 Nippon Sheet Glass Company, Limited Clad glass composition and mother glass rod for gradient-index rod lens formed using the same, gradient-index rod lens and method of manufacturing the same, rod lens array, and image processor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5612258A (en) * 1979-07-06 1981-02-06 Sony Corp Coil winding method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5612258A (en) * 1979-07-06 1981-02-06 Sony Corp Coil winding method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841306A1 (en) * 1996-11-06 1998-05-13 Nippon Sheet Glass Co., Ltd. Glass compositions for core/cladding type distributed index optical element
US8193108B2 (en) 2004-07-23 2012-06-05 Nippon Sheet Glass Company, Limited Clad glass composition and mother glass rod for gradient-index rod lens formed using the same, gradient-index rod lens and method of manufacturing the same, rod lens array, and image processor
JP2006154868A (en) * 2006-03-09 2006-06-15 Nippon Sheet Glass Co Ltd Optical fiber with lens function and method for manufacturing the same

Also Published As

Publication number Publication date
JPH0572337B2 (en) 1993-10-12

Similar Documents

Publication Publication Date Title
KR970006995B1 (en) Method and apparatus for production of glass preform for optical fiber
US6172817B1 (en) Graded index lens for fiber optic applications and technique of fabrication
DE3887060T2 (en) Process for the production of glass preforms for optical fibers.
GB1443376A (en) Cystallizable glass suitable for fibre production
EP0253427B1 (en) Method for making optical fibres with a core and an envelope from glass using the rod-in-tube method
JPS5734044A (en) Optical glass
DE806881C (en) Method and furnace for making glass
DE68904607T2 (en) METHOD FOR PRODUCING GLASS PREFORM FOR OPTICAL FIBERS.
US4289516A (en) Low loss optical fibers
JPS6476931A (en) Production of refractive index-distributing type lens
DE2915325A1 (en) PROCESS FOR MANUFACTURING OPTICAL FIBERS WITH GRADUATED REFRACTIVE INDEX
US5032000A (en) Gradient index-type optical device and process for production thereof
FR859141A (en) Process and furnace for electrically melting and refining glass, in particular for the manufacture of glass fibers or strands
TR28719A (en) The method for the production of double / double glass fiber.
JPS5575933A (en) Production of fiber for light transmission
RU2068815C1 (en) Method of preparing optical inorganic fibers
SE8100467L (en) OPTICAL GLASS FIBER AND PROCEDURE FOR ITS MANUFACTURING
SANGHERA et al. Process for Making Optical Fibers from Core and Cladding Glass Rods(Patent)
JPS596821B2 (en) Method for manufacturing multicomponent glass fiber
JPS54112217A (en) Production of optical fiber
GB2057160A (en) Processes for producing light-conducting glass fibres
JPH0269329A (en) Optical fiber molding device
JPS60176938A (en) Production of preform for optical fiber
JPS57201203A (en) Production of optical fiber
JPH038742A (en) Ge-as-s glass fiber having core-clad structure

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term