An*as`tig*mat"ic (?), a. [Pref. an-
not + astigmatic.] (Optics) Not astigmatic; --
said esp. of a lens system which consists of a converging lens and a
diverging lens of equal and opposite astigmatism but different focal
lengths, and sensibly free from astigmatism.
An*as`tig*mat"ic (?), a. [Pref. an-
not + astigmatic.] (Optics) Not astigmatic; --
said esp. of a lens system which consists of a converging lens and a
diverging lens of equal and opposite astigmatism but different focal
lengths, and sensibly free from astigmatism.