Achromatic lens
Definition of Achromatic lens
(Opt.)
a
lens
composed
usually
of
two
separate
lenses
,
a
convex
and
concave
,
of
substances
having
different
refractive
and
dispersive
powers
,
as
crown
and
flint
glass
,
with
the
curvatures
so
adjusted
that
the
chromatic
aberration
produced
by
the
one
is
corrected
by
other
,
and
light
emerges
from
the
compound
lens
undecomposed
.
See also:
Achromatic
Related Words
compound
lens
Word:
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-Achromatic lens-
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