| 摘要 |
<p>Optical fluorophosphate glasses based on Ba(PO3)2, Al(PO3)3, alkaline earth metal fluorides and AlF3 are described which have a refactive index ne between 1.47 and 1.50, an Abbe-value nu e between 85 and 80 and a positive anomalous partial dispersion value DELTA nu e between +17 and +22. They comprise (in wt.-%) 0.5-3 Mg, 8-10 Ca, 12-20 Sr, 9-12 Ba, 7-9 Al, 5-9 P, 8-12 O and 35-38 F. Ti, Na, K and H may additionally be present. The improved physico-chemical parameters (expansion coefficient, glass transition temperature, density, Knoop-hardness) and the transmission characteristics are given, and a process for producing these optical glasses is described.</p> |
