| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical glass which is used for design of space-saving and light imaging optical elements provided with various glass-type lenses and used in flights of various objects in space and has an increased refractive index.SOLUTION: A glass for space comprises 5-65 wt.% of SiO, 0-40 wt.% of BO, 0-12 wt.% of AlO, 5-50 wt.% of PbO, 0-8 wt.% of NaO and 0-20 wt.% of KO and contains at least three doping agents selected from CeO, MoO, BiO, WO, AgO, SnO, SbOand AsOin a total content of the doping agents of at least 0.1 wt.% in the glass for space. The glass for space preferably contains 0.5-1 wt.% of TiOadditionally. |
