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US 2003/0158027 A1Published application
Rake synthesizing circuit and rake synthesizing method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShigeo Furukawa, Masahiro Hiraka, Shigeki Yamada, Yoshiki Higashiyama
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Abstract
Mold lens glass including B2O3, SiO2, La2O3, ZnO, BaO, and CaO, wherein a composition in weight ratio is: B2O3 is 25% to 35% by weight, SiO2 is 1% to 7% by weight, where a total amount of B2O3 and SiO2 is 30% to 40% by weight. A content of La2O3 is 12% to 20% by weight, and a total amount of ZnO, BaO and CaO is 40% to 55% by weight. By using the mold lens glass of the present invention, it is possible to obtain mold lens glass having high refractive index, excellent water resistance and a stable glassy state.
Claims2
Mold lens glass including:
- 25% to 35% by weight of B2O3 and 1% to 7% by weight of SiO2, a total amount of which being 30% to 40% by weight;
- and
- 12% to 20% by weight of La2O3, a total amount of ZnO, BaO and CaO being 40% to 55% by weight.
Dependencies are inferred from the claim text.