Goethe in his “Farbenlehre” says in a survey of the hisrory of achromatic lenses that the practical and theoretical work of Boscovich and Steiner will not be forgotten; but Steiner's has ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Huygenian Huygens eyepieces are constructed of two plano-convex lenses with both plane sides facing the eye. Periplan Periplan eyepieces are constructed of one achromatic doublet and two plano-convex ...

Achromats are optical lenses designed to minimize chromatic aberration. Achromats are also known as achromatic lenses. Chromatic aberration is a type of optical distortion which occurs when a lens ...

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