A1P3L1A1N1A1T1S1
10 points
APLANATS is validvalid
APLANAT, a type of reflecting or refracting surface
APLANAT, an aplanatic lens, i.e. one free from spherical aberration
APLANAT, a type of reflecting or refracting surface
APLANAT, an aplanatic lens, i.e. one free from spherical aberration