JPH10120424A5 - - Google Patents

Info

Publication number
JPH10120424A5
JPH10120424A5 JP1997269601A JP26960197A JPH10120424A5 JP H10120424 A5 JPH10120424 A5 JP H10120424A5 JP 1997269601 A JP1997269601 A JP 1997269601A JP 26960197 A JP26960197 A JP 26960197A JP H10120424 A5 JPH10120424 A5 JP H10120424A5
Authority
JP
Japan
Prior art keywords
molten glass
forming
volume
mass
preform
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.)
Pending
Application number
JP1997269601A
Other languages
English (en)
Japanese (ja)
Other versions
JPH10120424A (ja
Filing date
Publication date
Priority claimed from US08/725,382 external-priority patent/US5766293A/en
Application filed filed Critical
Publication of JPH10120424A publication Critical patent/JPH10120424A/ja
Publication of JPH10120424A5 publication Critical patent/JPH10120424A5/ja
Pending legal-status Critical Current

Links

JP9269601A 1996-10-03 1997-10-02 制御された周辺縁壁構造を有する光学的プレフォームの製造方法および装置 Pending JPH10120424A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/725,382 US5766293A (en) 1996-10-03 1996-10-03 Method and apparatus for making optical preforms with controlled peripheral edge wall geometry
US08/725382 1996-10-03

Publications (2)

Publication Number Publication Date
JPH10120424A JPH10120424A (ja) 1998-05-12
JPH10120424A5 true JPH10120424A5 (enExample) 2005-06-23

Family

ID=24914326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9269601A Pending JPH10120424A (ja) 1996-10-03 1997-10-02 制御された周辺縁壁構造を有する光学的プレフォームの製造方法および装置

Country Status (3)

Country Link
US (1) US5766293A (enExample)
EP (1) EP0834477A1 (enExample)
JP (1) JPH10120424A (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6442975B1 (en) 1996-12-26 2002-09-03 Hoya Corporation Method of manufacturing thin-plate glass article, method of manufacturing glass substrate for information recording medium, and method of manufacturing magnetic recording medium
US6260387B1 (en) 1998-05-29 2001-07-17 Eastman Kodak Company Method for fabricating glass preforms for molding optical surfaces in glass elements
JP4780982B2 (ja) * 2005-03-14 2011-09-28 Ｈｏｙａ株式会社 モールドプレス成形装置および光学素子の製造方法
US8806895B2 (en) * 2010-12-09 2014-08-19 Hoya Corporation Manufacturing method for a glass substrate for magnetic disk
JP2012160252A (ja) 2011-01-31 2012-08-23 Hoya Corp 磁気ディスク用ガラス基板の製造方法
US12234175B1 (en) * 2024-04-16 2025-02-25 Corning Incorporated Glass parts and gob-pressing methods for making such
US12441645B1 (en) 2024-04-16 2025-10-14 Corning Incorporated Glass parts and gob-pressing methods for making such

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB990483A (en) * 1962-07-04 1965-04-28 Pilkington Brothers Ltd Improvements in or relating to the pressure moulding of articles
US3244497A (en) * 1962-09-27 1966-04-05 Bausch & Lomb Glass press mold structure with temperature regulation
US3271126A (en) * 1963-03-20 1966-09-06 Corning Glass Works Press forming apparatus for forming wafers from drips of glass
US3293017A (en) * 1963-03-20 1966-12-20 Corning Glass Works Method for forming glass wafers
US3833347A (en) * 1970-11-27 1974-09-03 Eastman Kodak Co Method for molding glass lenses
DE2438836B2 (de) * 1974-08-13 1977-09-01 D. Swarovski & Co, Glasschleiferei, Wattens, Tirol (Österreich) Verfahren zur herstellung von formkoerpern aus plastisch formbaren massen, insbesondere glas, und dafuer geeignete vorrichtung
US4168961A (en) * 1975-09-02 1979-09-25 Eastman Kodak Company Method of molding glass elements
CA1081958A (en) * 1975-09-02 1980-07-22 Gerald E. Blair Method of molding glass elements
US4734118A (en) * 1981-10-30 1988-03-29 Corning Glass Works Process to mold precision glass articles
US4554001A (en) * 1983-09-19 1985-11-19 Lynch Machinery Variable index glass ware press with computer control
JPS60145919A (ja) * 1983-12-29 1985-08-01 Ohara Inc 高精度ガラス成形品のプレス成形方法
US4629489A (en) * 1984-07-09 1986-12-16 Hoya Corporation Method of manufacturing pressed lenses
JPS62128934A (ja) * 1985-11-29 1987-06-11 Canon Inc 光学素子の製造装置
US4696692A (en) * 1986-12-10 1987-09-29 Corning Glass Works Kinematically determinate glass pressing mold assembly and method of use
US4836838A (en) * 1987-09-30 1989-06-06 Hoya Corporation Apparatus for molding glass articles
US4883528A (en) * 1989-03-08 1989-11-28 Corning Incorporated Apparatus for molding glass optical elements
JP2790547B2 (ja) * 1991-03-28 1998-08-27 松下電器産業株式会社 ガラス素材製造方法
JP3164404B2 (ja) * 1992-02-21 2001-05-08 オリンパス光学工業株式会社 ガラス光学素子の成形装置と成形方法

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