A₁P₃L₁A₁N₁A₁T₁

9 points

APLANAT is validvalid

a type of reflecting or refracting surface [n APLANATS]

32,507 of 196,601 in NWL2023·also valid in CSW24

an aplanatic lens, i.e. one free from spherical aberration [n -S]

10,555 of 280,887 in CSW24·also valid in NWL2023