JPS5659640A - Glass for spectacle lens - Google Patents

Glass for spectacle lens

Info

Publication number
JPS5659640A
JPS5659640A JP13592079A JP13592079A JPS5659640A JP S5659640 A JPS5659640 A JP S5659640A JP 13592079 A JP13592079 A JP 13592079A JP 13592079 A JP13592079 A JP 13592079A JP S5659640 A JPS5659640 A JP S5659640A
Authority
JP
Japan
Prior art keywords
glass
tio
sio
refractive index
specific gravity
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
JP13592079A
Other languages
Japanese (ja)
Other versions
JPS5953223B2 (en
Inventor
Kunio Takeuchi
Toshiharu Yamashita
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.)
Hoya Corp
Original Assignee
Hoya Corp
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 Hoya Corp filed Critical Hoya Corp
Priority to JP13592079A priority Critical patent/JPS5953223B2/en
Publication of JPS5659640A publication Critical patent/JPS5659640A/en
Publication of JPS5953223B2 publication Critical patent/JPS5953223B2/en
Expired legal-status Critical Current

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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight

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)
  • Eyeglasses (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

PURPOSE: To provide the titled thin lightweight glass contg. SiO2, B2O3, Na2O, K2O, Li2O, TiO2, etc. in a specified weight ratio, having a high refractive index and low specific gravity, and covering a low diopter region having a great demand.
CONSTITUTION: Starting materials such as silica powder, aluminum hydroxide, titanium oxide, borax, potassium carbonate and magnesium carbonate are blended so as to prepare a composition consisting of, by weight 56W67% SiO2, 0W7% B2O3, 0W5% AlO3, 0W11% Na2O, 0W10% K2O, 0W7% Li2O (11W18% Na2O+K2O+ Li2O), 13W19% TiO2, 0W4% MgO+CaO+SrO+ZnO and 0W2% La2O3+ZrO2+ Nb2O3, and the blend is heated to a high temp. to obtain the titled glass. This glass has ≥1.59 refractive index, ≥36 Abbe's number and ≤2.6 specific gravity.
COPYRIGHT: (C)1981,JPO&Japio
JP13592079A 1979-10-23 1979-10-23 glass for eyeglass lenses Expired JPS5953223B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13592079A JPS5953223B2 (en) 1979-10-23 1979-10-23 glass for eyeglass lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13592079A JPS5953223B2 (en) 1979-10-23 1979-10-23 glass for eyeglass lenses

Publications (2)

Publication Number Publication Date
JPS5659640A true JPS5659640A (en) 1981-05-23
JPS5953223B2 JPS5953223B2 (en) 1984-12-24

Family

ID=15162931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13592079A Expired JPS5953223B2 (en) 1979-10-23 1979-10-23 glass for eyeglass lenses

Country Status (1)

Country Link
JP (1) JPS5953223B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135151A (en) * 1981-10-02 1983-08-11 シヨツト・グラスヴエルケ Optical and ophthalmic glass
DE3319442A1 (en) * 1982-06-11 1983-12-15 Schott Optical Glass Inc., Duryea, Pa. OPTICAL GLASS WITH N (DOWN ARROW) D (DOWN ARROW)> = 1.59, V (DOWN ARROW) D (DOWN ARROW)> = 40.5, S <= 2.67 G.CM (UP ARROW) - ( UP ARROW) (UP ARROW) 3 (UP ARROW) AND (ALPHA) <= 90.10 (UP ARROW) - (UP ARROW) (UP ARROW) 7 (UP ARROW) / (DEGREE) C
WO1985003284A1 (en) * 1984-01-27 1985-08-01 Nippon Kogaku K. K. Lightweight glass for optical use
US4562161A (en) * 1982-02-20 1985-12-31 Schott Glaswerke Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3
FR2622569A1 (en) * 1987-11-04 1989-05-05 Corning Glass Works GLASS WITH MEDIUM REFRACTIVE INDEX FOR OPHTHALMIC APPLICATION
FR2767814A1 (en) * 1997-09-03 1999-03-05 Schott Glas OPTICAL FLINT BASED ON BARIUM AND LEAD FREE
FR2801881A1 (en) 1999-12-04 2001-06-08 Schott Glas LIGHT FLINTS LEAD FREE

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58135151A (en) * 1981-10-02 1983-08-11 シヨツト・グラスヴエルケ Optical and ophthalmic glass
US4719186A (en) * 1982-02-20 1988-01-12 Schott Glaswerke Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3
US4562161A (en) * 1982-02-20 1985-12-31 Schott Glaswerke Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3
JPS593041A (en) * 1982-06-11 1984-01-09 シヨツト・オプテイカル・グラス・インコ−ポレ−テツド High refractive index, low dispersibility and low density optical glass useful for correcting lens
US4444893A (en) * 1982-06-11 1984-04-24 Schott Glass Technologies, Inc. Highly refractive, low dispersion, low density optical glass suitable for corrective lenses
FR2528414A1 (en) * 1982-06-11 1983-12-16 Schott Optical Glass Inc OPTICAL GLASS WITH HIGH REFRACTIVE INDEX, LOW DISPERSION, LOW VOLUMIC MASS, SUITABLE FOR CORRECTIVE LENSES
DE3319442A1 (en) * 1982-06-11 1983-12-15 Schott Optical Glass Inc., Duryea, Pa. OPTICAL GLASS WITH N (DOWN ARROW) D (DOWN ARROW)> = 1.59, V (DOWN ARROW) D (DOWN ARROW)> = 40.5, S <= 2.67 G.CM (UP ARROW) - ( UP ARROW) (UP ARROW) 3 (UP ARROW) AND (ALPHA) <= 90.10 (UP ARROW) - (UP ARROW) (UP ARROW) 7 (UP ARROW) / (DEGREE) C
JPS6341860B2 (en) * 1982-06-11 1988-08-19 Shotsuto Oputeikaru Gurasu Inc
WO1985003284A1 (en) * 1984-01-27 1985-08-01 Nippon Kogaku K. K. Lightweight glass for optical use
US4812423A (en) * 1984-01-27 1989-03-14 Nikon Corporation Optical light weight glass
FR2622569A1 (en) * 1987-11-04 1989-05-05 Corning Glass Works GLASS WITH MEDIUM REFRACTIVE INDEX FOR OPHTHALMIC APPLICATION
FR2767814A1 (en) * 1997-09-03 1999-03-05 Schott Glas OPTICAL FLINT BASED ON BARIUM AND LEAD FREE
FR2801881A1 (en) 1999-12-04 2001-06-08 Schott Glas LIGHT FLINTS LEAD FREE
DE19958517C1 (en) * 1999-12-04 2001-06-21 Schott Glas Lead-free optical light flint glasses
US6551952B2 (en) 1999-12-04 2003-04-22 Schott Glas Lead-free optical light flint glass materials

Also Published As

Publication number Publication date
JPS5953223B2 (en) 1984-12-24

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