JPWO2022102045A5 - - Google Patents

Claims (29)

in % by mass,
SiO ₂ content: 20 % or more and 30% or less ,
Li ₂ O content: 2 % or more and 8% or less ,
Na ₂ O content: more than 0 % and 8% or less ,
BaO content: more than 0 % and 8% or less ,
ZrO ₂ content: 2 % or more and 10% or less ,
Nb ₂ O ₅ content: 40 % or more and 60% or less ,
Ratio _of TiO2 _content to _Nb2O5 content (TiO2 _/ Nb2O5 ₎ : more than 0 and 0.15 or less
optical glass. in % by mass,
SiO ₂ Content rate: 20% or more and 30% or less,
Li ₂ O content: 2% or more and 8% or less,
Na ₂ O content: more than 0% and 8% or less,
BaO content: more than 0% and 8% or less,
ZrO ₂ Content rate: 2% or more and 10% or less,
Nb ₂ O. ₅ Content rate: 40% or more and 60% or less,
TiO ₂ Content rate: more than 0% and 5.89% or less,
optical glass. in % by mass,
K. ₂ O content: 0% or more and 5% or less,
MgO content: 0% or more and 4% or less,
Ta ₂ O. ₅ Content rate: 0% or more and 6% or less,
The optical glass according to claim 1 or 2, wherein
SiO ₂ Content rate: 20% or more and 30% or less,
Li ₂ O content: 2% or more and 8% or less,
Na ₂ O content: more than 0% and 8% or less,
BaO content: more than 0% and 8% or less,
ZrO ₂ Content rate: 2% or more and 10% or less,
Nb ₂ O. ₅ Content rate: 45.96% or more and 60% or less,
optical glass. in % by mass,
K ₂ O content: 0 % or more and 5% or less ,
MgO content: 0 % or more and 4% or less ,
TiO ₂ content: 0 % or more and 10% or less ,
Ta ₂ O ₅ content: 0 % or more and 6% or less ,
The optical glass according to claim 4 , wherein Nb ₂ O. ₅ TiO relative to the content of ₂ content ratio (TiO ₂ /Nb ₂ O. ₅ ): 0 or more and 0.20 or less,
The optical glass according to claim 4 or 5. in % by mass,
Sb ₂ O ₃ content: 0 % or more and 1% or less ,
Y ₂ O ₃ content: 0 % or more and 3% or less ,
La ₂ O ₃ content: 0 % or more and 3% or less ,
Gd ₂ O ₃ content: 0 % or more and 3% or less,
The optical glass according to any one of claims 1 to 6 . in % by mass,
Total content of Li ₂ O, Na ₂ O and K ₂ O (ΣA ₂ O; where A = Li, Na, K): 8 % or more and 18% or less ,
The optical glass according to any one of claims 1 to 7. The optical glass according to any one of claims 1 to 8 , wherein the total content of MgO and BaO (MgO + BaO) is 0 % or more and 10% or less . in % by mass,
Total content of TiO ₂ , ZrO ₂ , Nb ₂ O ₅ and Ta ₂ O ₅ (TiO ₂ +ZrO ₂ +Nb ₂ O ₅ +Ta ₂ O ₅ ): 50 % or more and 65% or less ,
The optical glass according to any one of claims 1-9 . The ratio of the total content of _SiO2 , BaO, and _TiO2 to the total content of _ΣA2O (A=Li, Na, K), ZrO2 _, and _Nb2O5 (( _SiO2 + _BaO + _TiO2 )/( _ΣA2O + _ZrO2 + _Nb2O5 )): 0.30 or more and 0.70 or less _,
The optical glass according to any one of claims 1-10 . Ratio of SiO ₂ content to total content of TiO ₂ and Nb ₂ O ₅ (SiO ₂ /(TiO ₂ +Nb ₂ O ₅ )): 0.40 or more and 0.60 or less ,
The optical glass according to any one of claims 1-11 . The ratio of the total content of SiO ₂ and _{ΣA 2 O} (A = Li, Na, K) and BaO to the total content of ZrO ₂ and Nb 2 O ₅ ((SiO ₂ + ΣA ₂ O + BaO) / (ZrO ₂ + Nb ₂ O ₅ )): 0.60 or more and 0.90 or less ,
The optical glass according to any one of claims 1-12 . a refractive index (n _d ) in the range of 1.78 to 1.88 ;
The optical glass according to any one of claims 1-13 . Abbe number (v _d ) is in the range of 23 or more and 29 or less ,
The optical glass according to any one of claims 1-14 . partial dispersion ratio (P _g,F ) is 0.611 or less;
The optical glass according to any one of claims 1-15 . The anomalous dispersion value (ΔP _g,F ) is 0.0090 or less,
The optical glass according to any one of claims 1-16 . The difference (ΔT=T _x −T _g ) between the glass transition temperature (T _g ) and the crystallization initiation temperature (T _x ) is 230° C. or more.
The optical glass according to any one of claims 1-17 . The liquidus temperature (T _l ) is 1220° C. or less,
The optical glass according to any one of claims 1-18 . having a first lens element and a second lens element;
A cemented lens, wherein at least one of the first lens element and the second lens element is the optical glass according to any one of claims 1 to 19 . An optical system comprising the cemented lens according to claim 20 . A microscope objective lens comprising the optical system according to claim 21 . An interchangeable camera lens comprising the optical system according to claim 21 . 22. An optical device comprising the optical system of claim 21 . An optical element using the optical glass according to any one of claims 1 to 19 . 26. An optical system comprising the optical element of claim 25 . A microscope objective lens comprising an optical system according to claim 26 . An interchangeable camera lens comprising the optical system according to claim 26 . 27. An optical device comprising the optical system of claim 26 .