Thesaurus: aplanatic

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Definitions

1. a. Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens.
2. adj. free from or corrected for spherical aberration
3. 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.
4. Having two or more parts of different curvatures, so combinedas to remove spherical aberration; -- said of a lens. Aplanatic focusof a lens (Opt.), the point or focus from which rays diverging passthe lens without spherical aberration. In certain forms of lensesthere are two such foci; and it is by taking advantage of this factthat the best aplanatic object glasses of microscopes areconstructed.
5. s free from or corrected for spherical aberration