JPS57183328A - Production of flat plate lens - Google Patents

Production of flat plate lens

Info

Publication number
JPS57183328A
JPS57183328A JP6700681A JP6700681A JPS57183328A JP S57183328 A JPS57183328 A JP S57183328A JP 6700681 A JP6700681 A JP 6700681A JP 6700681 A JP6700681 A JP 6700681A JP S57183328 A JPS57183328 A JP S57183328A
Authority
JP
Japan
Prior art keywords
lens
flat plate
mold
heated
plate lens
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
JP6700681A
Other languages
Japanese (ja)
Other versions
JPS6332731B2 (en
Inventor
Takao Edahiro
Masao Kawachi
Katsunari Okamoto
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 Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6700681A priority Critical patent/JPS57183328A/en
Publication of JPS57183328A publication Critical patent/JPS57183328A/en
Publication of JPS6332731B2 publication Critical patent/JPS6332731B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/04—Re-forming tubes or rods
    • C03B23/049—Re-forming tubes or rods by pressing

Abstract

PURPOSE:A glass cylinder in which its refractive index changes from the center toward the periphery is heated in a mold at elevated temperature and simultaneously pressed downward to make it possible to produce a flat plate lens or a lens built in with a flat plate lens. CONSTITUTION:A cylindrical glass 1 whose refractive index changes larger or smaller from the center toward the periphery is placed in a mold 6 made of graphite, alumina or molybdenum and heated at about 1,800 deg.C in the furnace 8 in an inert gas atmosphere and simultaneously it is pressed with the plate 7 at a pressure P. The cylinder becomes half-melted and formed into a flat plate lens in the mold. Further, the resultant flat lens 3 is placed between 2 half-circular rods of quartz glass 9 to prepare a basic material for conjugate lens 10, which is heated at 2,000 deg.C in an electric furnace 11 and drawn downward to give a lens of small diameter.
JP6700681A 1981-05-06 1981-05-06 Production of flat plate lens Granted JPS57183328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6700681A JPS57183328A (en) 1981-05-06 1981-05-06 Production of flat plate lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6700681A JPS57183328A (en) 1981-05-06 1981-05-06 Production of flat plate lens

Publications (2)

Publication Number Publication Date
JPS57183328A true JPS57183328A (en) 1982-11-11
JPS6332731B2 JPS6332731B2 (en) 1988-07-01

Family

ID=13332404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6700681A Granted JPS57183328A (en) 1981-05-06 1981-05-06 Production of flat plate lens

Country Status (1)

Country Link
JP (1) JPS57183328A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958102A (en) * 1996-11-27 1999-09-28 Shin-Etsu Chemical Co., Ltd. Apparatus and method for making an optical fiber preform using a correction pass
WO2001035126A1 (en) * 1999-11-10 2001-05-17 Hamamatsu Photonics K.K. Manufacturing method of optical lens
US6947226B2 (en) 2001-05-09 2005-09-20 Hamamatsu Photonics K.K. Optical lens-use base material, optical lens, and method of producing optical lens
US7145724B2 (en) 2001-05-09 2006-12-05 Hamamatsu Photonics K.K. Optical lens and semiconductor laser device
US7322877B2 (en) 2001-05-09 2008-01-29 Hamamatsu Photonics K.K. Production method for optical lens
US7743631B2 (en) 2001-05-09 2010-06-29 Hamamatsu Photonics K.K. Method of forming an optical lens by drawing material with curved surface parts

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958102A (en) * 1996-11-27 1999-09-28 Shin-Etsu Chemical Co., Ltd. Apparatus and method for making an optical fiber preform using a correction pass
WO2001035126A1 (en) * 1999-11-10 2001-05-17 Hamamatsu Photonics K.K. Manufacturing method of optical lens
EP1233285A1 (en) * 1999-11-10 2002-08-21 Hamamatsu Photonics K.K. Manufacturing method of optical lens
EP1233285A4 (en) * 1999-11-10 2005-01-12 Hamamatsu Photonics Kk Manufacturing method of optical lens
US6947226B2 (en) 2001-05-09 2005-09-20 Hamamatsu Photonics K.K. Optical lens-use base material, optical lens, and method of producing optical lens
US7110193B2 (en) 2001-05-09 2006-09-19 Hamamatsu Photonics K.K. Optical lens preform, optical lens, and method of making optical lens
US7145724B2 (en) 2001-05-09 2006-12-05 Hamamatsu Photonics K.K. Optical lens and semiconductor laser device
US7322877B2 (en) 2001-05-09 2008-01-29 Hamamatsu Photonics K.K. Production method for optical lens
US7561335B2 (en) 2001-05-09 2009-07-14 Hamamatsu Photonics K.K. Optical lens and semiconductor laser apparatus
US7743631B2 (en) 2001-05-09 2010-06-29 Hamamatsu Photonics K.K. Method of forming an optical lens by drawing material with curved surface parts
US7833089B2 (en) 2001-05-09 2010-11-16 Hamamatsu Photonics K.K. Optical lens preform, optical lens, and method of making optical lens

Also Published As

Publication number Publication date
JPS6332731B2 (en) 1988-07-01

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