wollaston's doublet

CIDE DICTIONARY

wollaston's doublet, [After W. H. Wollaston, English physicist.].

A magnifying glass consisting of two plano-convex lenses. It is designed to correct spherical aberration and chromatic dispersion.

"Under "wollastonite" the eponymous inventor is described as a chemist." [Webster 1913 Suppl.]

For further exploring for "wollaston's doublet" in Webster Dictionary Online

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