Abrégé

There is provided an optical glass in which an amount of SiO2 is 5% by mass or more, an amount of B2O3 is 15% by mass or less, a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 1 to 15% by mass, a mass ratio of an amount of Li2O to the total amount of Li2O, Na2O, and K2O [Li2O/(Li2O+Na2O+K2O)] is 0.5 or less, a mass ratio of an amount of K2O to the total amount of Li2O, Na2O, and K2O [K2O/(Li2O+Na2O+K2O)] is 0.5 or less, a mass ratio of the total amount of Li2O, Na2O, and K2O to a total amount of MgO, CaO, SrO, and BaO [(Li2O+Na2O+K2O)/(MgO+CaO+SrO+BaO)] is 0.6 or less, an amount of TiO2 is 15% by mass or more, an amount of Nb2O5 is 1 to 30% by mass, a mass ratio of the amount of SiO2 to the amount of TiO2 [SiO2/TiO2] is 1.0 or less, the total amount of MgO, CaO, SrO, and BaO [MgO+CaO+SrO+BaO] is 5% by mass or more, a mass ratio of an amount of BaO to the total amount of MgO, CaO, SrO, and BaO [BaO/(MgO+CaO+SrO+BaO)] is 0.7 or less, a total amount of TiO2 and Nb2O5 [TiO2+Nb2O5] is 30% by mass or more, and a mass ratio of the amount of TiO2 to a total amount of TiO2, Nb2O5, Y2O3, ZrO2, La2O3, Gd2O3, Ta2O5, WO3, Yb2O3, and Bi2O3 [TiO2/(TiO2+Nb2O5+Y2O3+ZrO2+La2O3+Gd2O3+Ta2O5+WO3+Yb2O3+Bi2O3)] is 0.6 or more.

Classes IPC  ?

• C03C 3/064 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore
• G02B 27/01 - Dispositifs d'affichage "tête haute"

Abrégé

The optical glass includes SiO2, B2O3, TiO2, Nb2O5, Y2O3, La2O3, and Gd2O3 as essential components, in which, on a mass basis, a mass ratio of a B2O3 content to a SiO2 content (B2O3/SiO2) is less than 1.000, a mass ratio of Y2O3 content to a total content of Y2O3, La2O3, Gd2O3 and Yb2O3 (Y2O3/(Y2O3+La2O3+Gd2O3+Yb2O3)) is more than 0.020, and a refractive index nd is more than 2.00000.

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares
• G02B 27/01 - Dispositifs d'affichage "tête haute"

Abrégé

The optical glass has a wavelength λ5, which provides a spectral transmittance of 5% for a thickness of 10 mm, of more than 370 nm and less than 410 nm, a difference (λ70−λ5) between a wavelength λ70, which provides a spectral transmittance of 70% for a thickness of 10 mm, and λ5, of 70 nm or less, and a refractive index nd of 2.00000 or more.

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares
• G02B 27/01 - Dispositifs d'affichage "tête haute"

Abrégé

[Problem] To provide: an optical glass that has desired optical constants and suppressed deterioration of mechanical properties, and does not have a high glass transition temperature; and an optical element. [Solution] An optical glass has an Abbe number νd of at least 62.00, the content of B3+being 0 cation% to 50.00 cation% (exclusive of 0 cation%), the content of Si4+being more than 0 cation%, the content of F-being more than 0 anion%, and the total content [La3++Gd3++Y3+] of La3+, Gd3+, and Y3+ being at least 5 cation%.

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares
• G02B 1/00 - Éléments optiques caractérisés par la substance dont ils sont faitsRevêtements optiques pour éléments optiques

Abrégé

[Problem] To provide an optical glass and optical element that have desired optical constants, for which reductions in chemical durability and mechanical properties are suppressed, and for which the glass transition temperature is not high. [Solution] An optical glass for which: the Si4+content is greater than 0 cation% and is not more than 30 cation%; the B3+content is greater than 0 cation% and less than 50.00 cation%; the F-content is at least 10 anion%; the Ca2+content is not more than 25 cation%; the Zn2+content is not more than 13 cation%; the Ge4+content is not more than 5 cation%; the total content of La3+, Gd3+, and Y3+[La3++Gd3++Y3+] is at least 30 cation%; the total content of Mg2+, Ca2+, Sr2+, and Ba2+[Mg2++Ca2++Sr2++Ba2+] is at least 3.5 cation%; the total content of Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, and Ba2+[Li++Na++K++Rb++Cs++Mg2++Ca2++Sr2++Ba2+] is at least 3.5 cation%; the cation ratio of the total content of Si4+and B3+divided into the Si4+content [Si4+/(Si4++B3+)] is at least 0.020; and the cation ratio of the total content of Si4+, B3+, P5+, Ti4+, Nb5+, W6+, Bi3+, Zr4+, and Ta5+divided into the total content of La3+, Gd3+, Y3+, Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, and Ba2+[(La3++Gd3++Y3++Li++Na++K++Rb++Cs++Mg2++Ca2++Sr2++Ba2+)/(Si4++B3++P5++Ti4++Nb5++W6++Bi3++Zr4++Ta5+)] is at least 0.83.

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares
• G02B 1/00 - Éléments optiques caractérisés par la substance dont ils sont faitsRevêtements optiques pour éléments optiques

Abrégé

[Problem] To provide an optical glass and an optical element which have desired optical constants, suppress the deterioration of chemical durability and mechanical properties, and have a glass transition that is not high. [Solution] An optical glass has the B3+content of 0 cation% to 50.00 cation% (exclusive of 0 cation%), the F- content of more than 0 anion%, a glass transition temperature Tg of at most 625 °C, a Knoop hardness of at least 450, ΔPg, F of at least -0.0025, and Abbe number νd of at least 37.5, wherein refractive index nd and Abbe number νd satisfy the following expression. nd≥−0.0081×νd+2.1181

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares
• G02B 1/00 - Éléments optiques caractérisés par la substance dont ils sont faitsRevêtements optiques pour éléments optiques

Abrégé

The optical glass has, in mass %, SiO2 content of 3.00% or more and 20.00% or less, B2O3 content of 1.00% or more and 18.00% or less, La2O3 content of 20.00% or more and 60.00% or less, Nb2O5 content of 8.80% or more, TiO2 content of 5.00% or more and 20.00% or less, total content (MgO+CaO+SrO+BaO+ZnO) of 2.00% or more, mass ratio ((MgO+CaO+SrO+BaO+ZnO)/(SiO2+B2O3)) of 0.300 or more, mass ratio ((Nb2O5+TiO2+ZrO2+WO3)/(SiO2+B2O3)) of 1.600 or more, mass ratio ((La2O3+Gd2O3+Y2O3)/(SiO2+B2O3)) of 2.750 or more, mass ratio ((MgO+CaO+SrO+BaO+ZnO)/(Nb2O5+TiO2+ZrO2+WO3)) of 0.290 or less, and mass ratio ((Nb2O5+TiO2)/(SiO2+B2O3)) of 1.400 or more.

Classes IPC  ?

• C03C 3/068 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice contenant du bore contenant des terres rares

Abrégé

Provided is optical glass in which a refractive index nd is 1.950 or more, an amount of P2O5 is 10.0 to 40.0 mass %, an amount of TiO2 is 5.0 to 40.0 mass %, an amount of Nb2O5 is 20.0 to 60.0 mass %, an amount of Bi2O3 is 20.0 mass % or less, a total amount of Al2O3 and SiO2 [Al2O3+SiO2] is 2.0 mass % or less, a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 5.0 mass % or less, and a total amount of ZnO, SrO, and BaO [ZnO+SrO+BaO] is 0.01 to 12.0 mass %.

Classes IPC  ?

• C03C 3/21 - Compositions pour la fabrication du verre contenant un oxyde mais pas de silice contenant du phosphore contenant du titane, du zirconium, du vanadium, du tungstène ou du molybdène
• C03C 3/062 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice
• G02B 27/01 - Dispositifs d'affichage "tête haute"
• F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage

Abrégé

Provided is optical glass in which a refractive index nd is 1.900 or more, an Abbe number vd is 25.0 or less, an amount of P2O5 is 5.0 mass % or more, an amount of Bi2O3 is 20.0 mass % or less, an amount of TiO2 is 0.1 mass % or more, a mass ratio [TiO2/(Li2O+Na2O+K2O)] between the amount of TiO2, and a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 2.5 to 10.0, a mass ratio [TiO2/(MgO+CaO+ZnO+SrO+BaO)] between the amount of TiO2 and a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO] is 1.25 to 10.0, and a mass ratio [(Li2O+Na2O+MgO+CaO+ZnO+SrO)/(K2O+BaO)] between a total amount of Li2O, Na2O, MgO, CaO, ZnO, and SrO [Li2O+Na2O+MgO+CaO+ZnO+SrO] and a total amount of K2O and BaO [K2O+BaO] is 0.8 or less.

Classes IPC  ?

• C03C 3/21 - Compositions pour la fabrication du verre contenant un oxyde mais pas de silice contenant du phosphore contenant du titane, du zirconium, du vanadium, du tungstène ou du molybdène
• C03C 3/062 - Compositions pour la fabrication du verre contenant de la silice avec moins de 40% en poids de silice

Abrégé

Provided is optical glass in which an amount of P2O5 is 10.0 to 40.0 mass %, an amount of TiO2 is 5.0 to 40.0 mass %, an amount of Nb2O5 is 20.0 to 60.0 mass %, an amount of K2O is 0.01 mass % or more, a total amount of Li2O, Na2O, K2O, MgO, CaO, ZnO, SrO, and BaO [Li2O+Na2O+K2O+MgO+CaO+ZnO+SrO+BaO] is 20.0 mass % or less, a total amount of TiO2 and Nb2O5[TiO2+Nb2O5] is 55.0 mass % or more, a mass ratio [K2O/(Li2O+Na2O+K2O)] between the amount of K2O, and a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 0.5 or more, a mass ratio [(MgO+CaO+ZnO+SrO+BaO)/(Li2O+Na2O+K2O)] between a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO], and the total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 0.30 to 10.0, a mass ratio [TiO2/K2O] between the amount of TiO2 and the amount of K2O is 3.0 or more, and a mass ratio [(Li2O+Na2O+MgO+CaO+ZnO+SrO)/(K2O+BaO)] between a total amount of Li2O, Na2O, MgO, CaO, ZnO, and SrO [Li2O+Na2O+MgO+CaO+ZnO+SrO], and a total amount of K2O and BaO [K2O+BaO] is 0.8 or less.

Classes IPC  ?

• C03C 3/21 - Compositions pour la fabrication du verre contenant un oxyde mais pas de silice contenant du phosphore contenant du titane, du zirconium, du vanadium, du tungstène ou du molybdène