Importance

Loading Importance Indicators...

Abstract

The invention including phosphate optical glass with refractivity ranging from 1.93 to 1.95 and the Abbe number ranging from 16 to 19, with a low liquidus temperature. The phosphate optical glass, including: 5 to 25 wt % of NaPO₃, 1 to 20 wt % of KPO₃, 2 to 15 wt % of P₂O₅, 0 to 5 wt % of BaO, 0 to 10 wt % of Ba(PO₃)₂, more than 0 but less than 2 wt % of B₂O₃, 5 to 25 wt % of TiO₂, 35 to 55 wt % of Nb₂O₅, and 0 to 5 wt % of SiO₂. Refractivity of phosphate optical glass can reach 1.93 to 1.95, the Abbe number can reach 16 to 19, the liquidus temperature is below 1,120° C., the processing property during melting is good, the glass surface is unlikely to be devitrified during the processing of the glass, and can be formed easily.

Loading the Abstract Image...

First Claim