wollaston's doublet

Wollaston\'s doublet

Wol"las*ton's dou"blet\ [After W. H. Wollaston, English physicist.] (Optics) A magnifying glass consisting of two plano-convex lenses. It is designed to correct spherical aberration and chromatic dispersion.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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