Question

Uses of archomatic lens

Answer 1

An achromatic lens, also referred to as an achromat, typically consists of two optical components cemented together, usually a positive low-index (crown) element and a negative high-index (flint) element. ... Therefore, an achromatic lens will have noticeable advantages over a comparable diameter and focal length singlet.

Answer 2

an achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical Abbreviation achromatic lenses are connected to bring to wavelength typically red and blue in to focus on the same plane

and invented the achromatic lens

John dollond....