Optical glass and preparation method thereof

The invention provides optical glass and a preparation method thereof. The optical glass comprises the following components by mole percent: 13%-25% of SiO2; 8%-17% of B2O3; 0%-6% of Al2O3; 0.1%-8% of BN (boron nitride); 20% to 30% of La2O3; 0%-5% of Y2O3; 2%-8% of Nb2O5; 20% to 30% of TiO2; 3%-9% o...

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Bibliographische Detailangaben
Hauptverfasser:	JIANG JINGLU, CHEN ZHEN, HU JINQING, HU XIANGPING, RONG JUNHUA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	The invention provides optical glass and a preparation method thereof. The optical glass comprises the following components by mole percent: 13%-25% of SiO2; 8%-17% of B2O3; 0%-6% of Al2O3; 0.1%-8% of BN (boron nitride); 20% to 30% of La2O3; 0%-5% of Y2O3; 2%-8% of Nb2O5; 20% to 30% of TiO2; 3%-9% of ZrO2; 0%-5% of ZnO; the refractive index of the optical glass is 1.99 to 2.05, and the abbe number of the optical glass is 26 to 32. The optical glass is low in cost, and the cost of an optical system is further reduced. The optical glass provided by the invention has excellent performance and is beneficial to improving transmission of purple light wave bands of an optical system. 本发明提供一种光学玻璃及其制备方法。光学玻璃以摩尔百分比计含有以下组分：SiO2：13％～25％；B2O3：8％～17％；Al2O3：0％～6％；BN：0.1％～8％；La2O3：20％～30％；Y2O3：0％～5％；Nb2O5：2％～8％；TiO2：20％～30％；ZrO2：3％～9％；ZnO：0％～5％；所述光学玻璃的折射率为1.99～2.05，阿贝数为26～32。本发明的光学玻璃的成本低廉，进一步有利于降低光学系统成本。本发明的光学玻璃的性能优异，有利于提高光学系统紫光波段的透过。