JPH0316932A - Optical glass for precision press-molding - Google Patents

Optical glass for precision press-molding

Info

Publication number
JPH0316932A
JPH0316932A JP14999589A JP14999589A JPH0316932A JP H0316932 A JPH0316932 A JP H0316932A JP 14999589 A JP14999589 A JP 14999589A JP 14999589 A JP14999589 A JP 14999589A JP H0316932 A JPH0316932 A JP H0316932A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
molding
optical glass
refractive index
precision press
temperature
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
JP14999589A
Other versions
JP2738744B2 (en )
Inventor
Nobuyoshi Baba
Shinobu Nagahama
Original Assignee
Sumita Kogaku Glass:Kk
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

Links

Abstract

PURPOSE: To provide an optical glass for precision press-molding, having a specific oxide composition, a yield temperature of ≤570°C and refractive index and Abbe number falling within a range defined by three specific points and moldable by press-molding at an extremely low temperature.
CONSTITUTION: The objective optical glass for precision press-molding and having low softening temperature, high refractive index and low dispersion has a composition of (A) 23-30wt.% of B2O3, (B) 0-6wt.% of SiO2 (A+B is 26-33wt.%). (C) 0-23wt.% of La2O3. (D) 0.4-34wt.% of Gd2O3, (E) 0-14wt.% of Y2O3 (C+D+E is 1-43wt.%), (F) 3-5wt.% of Li2O, (G) 0-24wt.% of ZnO, (B) 0-7wt.% of ZrO2, (I) 0-15wt.% of Ta2O5, (J) 0-3wt.% of Nb2O5 (H+I+J is 0-19wt.%), (K) 20-41wt.% of LaF3, (L) 0-19wt.% of GdF3 and (M) 0-15wt.% of YF3 (K+L+M is 20-60wt.%), a yield temperature of ≤570°C and a refractive index and an Abbe number falling within the range defined by the points A, B and C of the figure.
COPYRIGHT: (C)1991,JPO&Japio
JP14999589A 1989-06-13 1989-06-13 The optical glass for precision press-molding Expired - Fee Related JP2738744B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14999589A JP2738744B2 (en) 1989-06-13 1989-06-13 The optical glass for precision press-molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14999589A JP2738744B2 (en) 1989-06-13 1989-06-13 The optical glass for precision press-molding

Publications (2)

Publication Number Publication Date
JPH0316932A true true JPH0316932A (en) 1991-01-24
JP2738744B2 JP2738744B2 (en) 1998-04-08

Family

ID=15487165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14999589A Expired - Fee Related JP2738744B2 (en) 1989-06-13 1989-06-13 The optical glass for precision press-molding

Country Status (1)

Country Link
JP (1) JP2738744B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8110515B2 (en) 2005-10-11 2012-02-07 Ohara, Inc. Optical glass
JP2014043390A (en) * 2012-08-27 2014-03-13 Cdgm Glass Co Ltd Optical glass, glass preform using the same, optical component and optical apparatus
JP2014214082A (en) * 2013-04-30 2014-11-17 株式会社オハラ Optical glass, preform and optical element
JP5659023B2 (en) * 2009-02-03 2015-01-28 Hoya株式会社 Optical glass, a preform for precision press molding, an optical element
JP6028071B1 (en) * 2015-07-07 2016-11-16 株式会社住田光学ガラス Optical glass, glass preform, and optics

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146952A (en) * 1983-02-09 1984-08-23 Corning Glass Works Formable fluoborate optical glass
JPS60221338A (en) * 1984-04-12 1985-11-06 Ohara Inc Optical glass
JPS62100449A (en) * 1985-10-24 1987-05-09 Ohara Inc Optical glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146952A (en) * 1983-02-09 1984-08-23 Corning Glass Works Formable fluoborate optical glass
JPS60221338A (en) * 1984-04-12 1985-11-06 Ohara Inc Optical glass
JPS62100449A (en) * 1985-10-24 1987-05-09 Ohara Inc Optical glass

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8110515B2 (en) 2005-10-11 2012-02-07 Ohara, Inc. Optical glass
JP5659023B2 (en) * 2009-02-03 2015-01-28 Hoya株式会社 Optical glass, a preform for precision press molding, an optical element
JP2014043390A (en) * 2012-08-27 2014-03-13 Cdgm Glass Co Ltd Optical glass, glass preform using the same, optical component and optical apparatus
JP2014214082A (en) * 2013-04-30 2014-11-17 株式会社オハラ Optical glass, preform and optical element
JP6028071B1 (en) * 2015-07-07 2016-11-16 株式会社住田光学ガラス Optical glass, glass preform, and optics
WO2017006505A1 (en) * 2015-07-07 2017-01-12 株式会社住田光学ガラス Optical glass, glass preform and optical component

Also Published As

Publication number Publication date Type
JP2738744B2 (en) 1998-04-08 grant

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