| 摘要 |
<p>This invention is concerned with the preparation of moldable optical glasses having refractive indices of about 1.65-1.735, dispersions of about 38-58, transition temperatures lower than about 500°C, softening points lower than about 600°C, and satisfactory chemical durability consisting essentially, expressed in terms of parts by weight as calculated from the batch, of
<TableDetails id="tabla01" num="0001"><Image id="ia01" he="65" wi="71" file="IMGA0001.TIF" imgContent="table" imgFormat="TIFF" inline="no" /></TableDetails><TableDetails id="tabla02" num="0002"><Image id="ia02" he="27" wi="48" file="IMGA0002.TIF" imgContent="table" imgFormat="TIFF" inline="no" /></TableDetails></p> |
