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more about aplanatic
aplanatic |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Aplanatic \Ap`la*nat"ic\, a. [Gr. 'a priv. + ? disposed to wander, wandering, ? to wander.] (Opt.) Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. {Aplanatic focus} of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed. From WordNet r 1.6 [wn]: aplanatic adj : (optics) free from or corrected for spherical aberration; "an aplanatic mirror"
more about aplanatic
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