Encircled energy
= Encircled energy
{title2=$E(R)$}
<Encircled energy> is the fraction of total image <radiant flux> within a circle of radius $R$ around the centre of a <point spread function>.
= Encircled energy
{title2=$E(R)$}
<Encircled energy> is the fraction of total image <radiant flux> within a circle of radius $R$ around the centre of a <point spread function>.