JP4231501B2 - 光学ガラス - Google Patents
光学ガラス Download PDFInfo
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- JP4231501B2 JP4231501B2 JP2005298216A JP2005298216A JP4231501B2 JP 4231501 B2 JP4231501 B2 JP 4231501B2 JP 2005298216 A JP2005298216 A JP 2005298216A JP 2005298216 A JP2005298216 A JP 2005298216A JP 4231501 B2 JP4231501 B2 JP 4231501B2
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- 239000005304 optical glass Substances 0.000 title claims description 54
- 239000011521 glass Substances 0.000 claims description 78
- 238000000465 moulding Methods 0.000 claims description 17
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 14
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 13
- 238000000691 measurement method Methods 0.000 claims description 12
- 230000009477 glass transition Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 11
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 4
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 4
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 238000004031 devitrification Methods 0.000 description 16
- 238000005498 polishing Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000416 bismuth oxide Inorganic materials 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 238000010301 surface-oxidation reaction Methods 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007496 glass forming Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052716 thallium Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 241000501754 Astronotus ocellatus Species 0.000 description 1
- -1 B 2 O 3 Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 238000005816 glass manufacturing process Methods 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
-
- 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
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
-
- 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
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/122—Silica-free oxide glass compositions containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/145—Silica-free oxide glass compositions containing boron containing aluminium or beryllium
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
- C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/17—Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/19—Silica-free oxide glass compositions containing phosphorus containing boron
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/21—Silica-free oxide glass compositions containing phosphorus containing titanium, zirconium, vanadium, tungsten or molybdenum
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
- C03C3/247—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron containing fluorine and phosphorus
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)
Description
BaO:0〜50%、及び/又は
Al2O3:0〜10%、及び/又は
TiO2:0〜20%、及び/又は
Nb2O5:0〜20%、及び/又は
Ta2O5:0〜15%、及び/又は
ZrO2:0〜10%、及び/又は
ZnO:0〜20%、及び/又は
MgO:0〜10%、及び/又は
CaO:0〜15%、及び/又は
SrO:0〜50%、及び/又は
Li2O:0〜15%、及び/又は
Na2O:0〜15%、及び/又は
K2O:0〜20%、及び/又は
Y2O3:0〜10%、及び/又は
La2O3:0〜10%、及び/又は
Gd2O3:0〜10%、及び/又は
Yb2O3:0〜10%、及び/又は
Sb2O3:0〜3%、及び/又は
GeO2:0〜20%、及び/又は
F:0〜5%
を含有する(1)から(6)いずれか記載の光学ガラス。
本発明の光学ガラスを構成する各成分の組成範囲を以下に述べる。各成分は質量%にて表現する。なお、本願明細書中において質量%で表されるガラス組成は全て酸化物基準での質量%で表されたものである。ここで、「酸化物基準」とは、本発明のガラス構成成分の原料として使用される酸化物、硝酸塩等が溶融時にすべて分解され酸化物へ変化すると仮定した場合に、当該生成酸化物の質量の総和を100質量%として、ガラス中に含有される各成分を表記した組成である。
Bi2O3は、ガラスの安定性の向上、及び、高屈折率高分散化及びガラス転移温度(Tg)を下げるため、本発明の目的を達成するのに欠かせない成分である。しかし、Bi2O3を過剰に含有するとガラス安定性が損なわれ、少なすぎると本発明に目的を満たすことが出来ない。よって、Bi2O3量の含有量の下限は、好ましくは10%、より好ましくは20%、最も好ましくは30%である。また、含有量の上限は90%未満、より好ましくは80%未満、最も好ましくは70%未満である。
他の成分を本願発明のガラスの特性を損なわない範囲で必要に応じ、添加することができる。ただし、Tiを除くV,Cr,Mn,Fe,Co,Ni,Cu,Ag及びMo等の各遷移金属成分は、それぞれを単独又は複合して少量含有した場合においても、ガラスが着色し、可視域の特定の波長に吸収を生じさせる。したがって、可視領域の波長を使用する光学ガラスにおいては、実質的に含まないことが好ましい。
Bi2O3:10〜90%未満、及び/又は
SiO2:0%を超え30%以下、及び/又は
BaO:0〜50%、及び/又は
B2O3:0〜30%、及び/又は
Al2O3:0〜10%、及び/又は
TiO2:0〜20%、及び/又は
Nb2O5:0〜20%、及び/又は
WO3:0〜15%、及び/又は
Ta2O5:0〜15%、及び/又は
ZrO2:0〜10%、及び/又は
ZnO:0〜20%、及び/又は
MgO:0〜10%、及び/又は
CaO:0〜15%、及び/又は
SrO:0〜50%、及び/又は
Li2O:0〜15%、及び/又は
Na2O:0〜15%、及び/又は
K2O:0〜20%、及び/又は
Y2O3:0〜10%、及び/又は
La2O3:0〜10%、及び/又は
Gd2O3:0〜10%、及び/又は
Yb2O3:0〜10%、及び/又は
P2O5:0〜10%、及び/又は
Sb2O3:0〜3%、及び/又は
GeO2:0〜20%、及び/又は
F:0〜5%
本発明の光学ガラスは、通常の光学ガラスを製造する方法であれば、特に限定されないが、例えば、以下の方法により製造することができる。各出発原料(酸化物、炭酸塩、硝酸塩、リン酸塩、硫酸塩、フッ化物塩など)を所定量秤量し、均一に混合する。混合した原料を石英坩堝又はアルミナ坩堝に投入し、粗溶融の後、金坩堝、白金坩堝、白金合金坩堝又はイリジウム坩堝に投入し、溶解炉で850〜1250℃で1〜10時間熔解する。その後、攪拌、均質化した後、適当な温度に下げて金型等に鋳込み、ガラスを製造する。
F:荷重(N)
l:長い方の対角線の長さ(mm)
磨耗度={(試料の磨耗度/比重)/(標準試料の磨耗質量/比重)}×100 (2)
Claims (7)
- 可視域の波長に用いられる光学ガラスであって、
質量%で、Bi2O3を10%以上80%未満、B2O3を7.479%以上16.651%以下、SiO2を0%以上6.150%以下、WO3を0%以上1.469%以下、及びP2O5を0%以上10%以下含有し、Ce成分を実質的に含有しない、
「JOGIS09−1975光学ガラスのヌープ硬さの測定方法」に準じた測定方法において、7級から4級のヌープ硬さを有する光学ガラス。 - 屈折率[nd]が1.70以上、アッベ数[νd]が10以上の光学恒数を有する請求項1記載の光学ガラス。
- 「JOGIS10−1994光学ガラスの磨耗度の測定方法」に準じた測定方法において、450以下の磨耗度を有する請求項1または2記載の光学ガラス。
- ガラス転移温度(Tg)が530℃以下である請求項1から3いずれか記載の光学ガラス。
- 質量%で
BaO:0〜50%、及び/又は
Al2O3:0〜10%、及び/又は
TiO2:0〜20%、及び/又は
Nb2O5:0〜20%、及び/又は
Ta2O5:0〜15%、及び/又は
ZrO2:0〜10%、及び/又は
ZnO:0〜20%、及び/又は
MgO:0〜10%、及び/又は
CaO:0〜15%、及び/又は
SrO:0〜50%、及び/又は
Li2O:0〜15%、及び/又は
Na2O:0〜15%、及び/又は
K2O:0〜20%、及び/又は
Y2O3:0〜10%、及び/又は
La2O3:0〜10%、及び/又は
Gd2O3:0〜10%、及び/又は
Yb2O3:0〜10%、及び/又は
Sb2O3:0〜3%、及び/又は
GeO2:0〜20%、及び/又は
F:0〜5%
を含有する請求項1から4いずれか記載の光学ガラス。 - 請求項1から5いずれか記載の光学ガラスからなるガラス成形予備体。
- 請求項6記載のガラス成形予備体を精密プレス成形してなる光学素子。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005298216A JP4231501B2 (ja) | 2005-10-12 | 2005-10-12 | 光学ガラス |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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