WO2005102949A3 - Optical glass - Google Patents

Optical glass Download PDF

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Publication number
WO2005102949A3
WO2005102949A3 PCT/JP2005/008095 JP2005008095W WO2005102949A3 WO 2005102949 A3 WO2005102949 A3 WO 2005102949A3 JP 2005008095 W JP2005008095 W JP 2005008095W WO 2005102949 A3 WO2005102949 A3 WO 2005102949A3
Authority
WO
WIPO (PCT)
Prior art keywords
range
optical glass
zro2
ta2o5
zno
Prior art date
Application number
PCT/JP2005/008095
Other languages
French (fr)
Other versions
WO2005102949A2 (en
Inventor
Susumu Uehara
Original Assignee
Ohara Kk
Susumu Uehara
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 Ohara Kk, Susumu Uehara filed Critical Ohara Kk
Publication of WO2005102949A2 publication Critical patent/WO2005102949A2/en
Publication of WO2005102949A3 publication Critical patent/WO2005102949A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

The optical glass of the present invention has optical constants of a refractive index (nd) within a range from 1.74 to 1.80 and an Abbe number (ν d) within a range from 47 to 51, contains, as essential components, SiO2, B2O3. La2O3, Gd2O3, ZrO2, Ta2O5, ZnO and Li2O, is substantially free of Pb, As and F, and contains ZrO2 in an amount of 6 mass % or less. The optical glass has ratio of ZnO/(ZrO2 + Ta2O5) within a range from 0.45 to 1.5 and glass transition temperature (Tg) within a range from 530 °C to 630 °C.
PCT/JP2005/008095 2004-04-26 2005-04-21 Optical glass WO2005102949A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2004129616 2004-04-26
JP2004-129616 2004-04-26
JP2004277135 2004-09-24
JP2004-277135 2004-09-24

Publications (2)

Publication Number Publication Date
WO2005102949A2 WO2005102949A2 (en) 2005-11-03
WO2005102949A3 true WO2005102949A3 (en) 2006-03-30

Family

ID=35197532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/008095 WO2005102949A2 (en) 2004-04-26 2005-04-21 Optical glass

Country Status (1)

Country Link
WO (1) WO2005102949A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8507394B2 (en) * 2005-04-22 2013-08-13 Ohara Inc. Glass composition
JP5561888B2 (en) * 2005-10-11 2014-07-30 株式会社オハラ Optical glass

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160340A (en) * 1980-05-09 1981-12-10 Ohara Inc Optical glass
DE10053388A1 (en) * 1999-10-28 2001-05-03 Hoya Corp Precision press formable glass used in production of optical part comprises oxides of boron, yttrium, silicon, lithium, calcium, zinc and gadolinium
DE10126554A1 (en) * 2000-05-31 2002-01-17 Hoya Corp Optical glass for optical purposes, has specified values for refractive index, Abbe's number and glass transition point
EP1236694A1 (en) * 2001-02-20 2002-09-04 Hoya Corporation Optical glass, press-molding preform and optical part
JP2003252647A (en) * 2001-12-27 2003-09-10 Nippon Electric Glass Co Ltd Optical glass for mold press
US20030211929A1 (en) * 2002-03-18 2003-11-13 Kazutaka Hayashi Optical glass for precision press molding, preform for precision press molding, and process for the production thereof
EP1433757A1 (en) * 2002-12-27 2004-06-30 Hoya Corporation Optical glass, press-molding glass gob and optical element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160340A (en) * 1980-05-09 1981-12-10 Ohara Inc Optical glass
DE10053388A1 (en) * 1999-10-28 2001-05-03 Hoya Corp Precision press formable glass used in production of optical part comprises oxides of boron, yttrium, silicon, lithium, calcium, zinc and gadolinium
DE10126554A1 (en) * 2000-05-31 2002-01-17 Hoya Corp Optical glass for optical purposes, has specified values for refractive index, Abbe's number and glass transition point
EP1236694A1 (en) * 2001-02-20 2002-09-04 Hoya Corporation Optical glass, press-molding preform and optical part
JP2003252647A (en) * 2001-12-27 2003-09-10 Nippon Electric Glass Co Ltd Optical glass for mold press
US20030211929A1 (en) * 2002-03-18 2003-11-13 Kazutaka Hayashi Optical glass for precision press molding, preform for precision press molding, and process for the production thereof
EP1433757A1 (en) * 2002-12-27 2004-06-30 Hoya Corporation Optical glass, press-molding glass gob and optical element

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 044 (C - 095) 19 March 1982 (1982-03-19) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Also Published As

Publication number Publication date
WO2005102949A2 (en) 2005-11-03

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