JPS6479027A - Molding method of glass lens - Google Patents

Molding method of glass lens

Info

Publication number
JPS6479027A
JPS6479027A JP23654187A JP23654187A JPS6479027A JP S6479027 A JPS6479027 A JP S6479027A JP 23654187 A JP23654187 A JP 23654187A JP 23654187 A JP23654187 A JP 23654187A JP S6479027 A JPS6479027 A JP S6479027A
Authority
JP
Japan
Prior art keywords
die
glass
temp
lens
molding
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
JP23654187A
Other languages
Japanese (ja)
Other versions
JPH0753587B2 (en
Inventor
Takashi Inoue
Shoji Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62236541A priority Critical patent/JPH0753587B2/en
Publication of JPS6479027A publication Critical patent/JPS6479027A/en
Publication of JPH0753587B2 publication Critical patent/JPH0753587B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/02—Press-mould materials
    • C03B2215/03—Press-mould materials defined by material properties or parameters, e.g. relative CTE of mould parts
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/46—Lenses, e.g. bi-convex
    • C03B2215/48—Convex-concave
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/72—Barrel presses or equivalent, e.g. of the ring mould type

Abstract

PURPOSE:To enable stable and high-precision molding without changing the once obtained optimum molding condition by using a die material wherein the thermal expansion coefficient of a convex die for the concave face of a lens is equal to the thermal expansion coefficient of a glass stock or is larger than it. CONSTITUTION:After firstly feeding a glass stock 4 into a die, the die is set between upper and lower press heads 5, 6 held in the nonoxidative atmosphere and the glass stock is heated at the temp. close to the softening temp. of glass together with the die. Then after pressurizing and molding it, heating is stopped and it is pressurized and cooled at the temp. close to dislocation point of glass. After releasing pressurization at the temp. not higher than dislocation point of glass, it is cooled at ordinary temp. and a molded lens 7 is taken out from the inside of the die. In case of measuring shape precision of the lens molded by this molding method, the molded lens having extremely high precision not more than 0.2mu is obtained. Shrinkage at a time of cooling the molded lens is not hindered by the die even for every lens shapes in principle by using this method and natural thermal shrinkage is performed and therefore stable and high-precision molding is enabled.
JP62236541A 1987-09-21 1987-09-21 Glass lens molding method Expired - Fee Related JPH0753587B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62236541A JPH0753587B2 (en) 1987-09-21 1987-09-21 Glass lens molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62236541A JPH0753587B2 (en) 1987-09-21 1987-09-21 Glass lens molding method

Publications (2)

Publication Number Publication Date
JPS6479027A true JPS6479027A (en) 1989-03-24
JPH0753587B2 JPH0753587B2 (en) 1995-06-07

Family

ID=17002197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62236541A Expired - Fee Related JPH0753587B2 (en) 1987-09-21 1987-09-21 Glass lens molding method

Country Status (1)

Country Link
JP (1) JPH0753587B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006206346A (en) * 2005-01-25 2006-08-10 Nikon Corp Mold for glass molding and optical element molding device and method using the same
JP2011186052A (en) * 2010-03-05 2011-09-22 Hoya Corp Mold for forming optical lens and method for manufacturing optical lens using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345136A (en) * 1986-08-12 1988-02-26 Olympus Optical Co Ltd Forming method for optical element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345136A (en) * 1986-08-12 1988-02-26 Olympus Optical Co Ltd Forming method for optical element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006206346A (en) * 2005-01-25 2006-08-10 Nikon Corp Mold for glass molding and optical element molding device and method using the same
JP2011186052A (en) * 2010-03-05 2011-09-22 Hoya Corp Mold for forming optical lens and method for manufacturing optical lens using the same

Also Published As

Publication number Publication date
JPH0753587B2 (en) 1995-06-07

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees