JPS5770617A - Molding of lens - Google Patents

Molding of lens

Info

Publication number
JPS5770617A
JPS5770617A JP14660780A JP14660780A JPS5770617A JP S5770617 A JPS5770617 A JP S5770617A JP 14660780 A JP14660780 A JP 14660780A JP 14660780 A JP14660780 A JP 14660780A JP S5770617 A JPS5770617 A JP S5770617A
Authority
JP
Japan
Prior art keywords
mold
resin
lens
molding
sprue
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
JP14660780A
Other languages
Japanese (ja)
Inventor
Kiyokazu Shibusawa
Nobuhiko Nakagawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14660780A priority Critical patent/JPS5770617A/en
Publication of JPS5770617A publication Critical patent/JPS5770617A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses

Abstract

PURPOSE:To obtain the lens of accurate shape and size by charging fluid resin in a mold and rotating it, cooling resin under effect of centrifugal force. CONSTITUTION:A sprue 4 and a sprue 6 are connected at the condition of stopping rotation of the upper mold 1 and the lower mold 2 and fluid resin is filled by injection into the molding cavity 3 through these sqrues. Then, the upper mold 1 and the lower mold 2 are rotated as one body around the optical axis 0. Rotational velocity is made so as to exert sufficient centrifugal force on the injected resin. When resin is cooled, rotation of the mold is stopped, molding is finished. By this, the shape of the mold is transferred with fidelity and the accurate lens is obtained.
JP14660780A 1980-10-20 1980-10-20 Molding of lens Pending JPS5770617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14660780A JPS5770617A (en) 1980-10-20 1980-10-20 Molding of lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14660780A JPS5770617A (en) 1980-10-20 1980-10-20 Molding of lens

Publications (1)

Publication Number Publication Date
JPS5770617A true JPS5770617A (en) 1982-05-01

Family

ID=15411548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14660780A Pending JPS5770617A (en) 1980-10-20 1980-10-20 Molding of lens

Country Status (1)

Country Link
JP (1) JPS5770617A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188601A (en) * 1983-04-11 1984-10-26 Hitachi Ltd Plastic lens
US4540534A (en) * 1983-10-11 1985-09-10 American Optical Corporation Apparatus and method for injection molding lenses
JPS61100420A (en) * 1984-10-24 1986-05-19 Matsushita Electric Ind Co Ltd Manufacture of plastic lens
US5066431A (en) * 1990-04-20 1991-11-19 Briggs Charles R Method of making toric contact lenses
WO1996033860A1 (en) * 1995-04-28 1996-10-31 Asahi Lite Optical Co., Ltd. Method of manufacturing plastic lenses

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188601A (en) * 1983-04-11 1984-10-26 Hitachi Ltd Plastic lens
JPH0249617B2 (en) * 1983-04-11 1990-10-30 Hitachi Ltd
US4540534A (en) * 1983-10-11 1985-09-10 American Optical Corporation Apparatus and method for injection molding lenses
JPS61100420A (en) * 1984-10-24 1986-05-19 Matsushita Electric Ind Co Ltd Manufacture of plastic lens
US5066431A (en) * 1990-04-20 1991-11-19 Briggs Charles R Method of making toric contact lenses
WO1996033860A1 (en) * 1995-04-28 1996-10-31 Asahi Lite Optical Co., Ltd. Method of manufacturing plastic lenses
US5922251A (en) * 1995-04-28 1999-07-13 Asahi Lite Optical Co., Ltd. Method of manufacturing plastic lenses
KR100429934B1 (en) * 1995-04-28 2004-07-21 가부시키가이샤 아사히 옵티컬 Manufacturing method of plastic lens

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