Glass selection tends to be both a science and an art. It is the intent of this paper to remove the yOn2}Z
"mystique" surrounding glass selection, primarily based on the chromatic properties of the glass, (fk, 80
and to show via careful parametric analyses how we can optimally select glasses for lenses of +k(3+b$S-
different f/numbers, spectral bands, and performance requirements. The important roles of !ovZ>,1
refractive index and Abbe number as well as partial dispersion will be considered. Using the }96/:
;:k
SCHOTT glass map, six separate and identifiable regions along with glasses within each region YL&b9e4
will be discussed. The goal for this paper is to make glass selection easier to understand.