ALL meanings of achromatic lens
ach·ro·mat·ic lens
A a - noun achromatic lens a system of two or more lenses that is substantially free from chromatic aberration and in which the lenses are made of different substances so that the focal length of the system is the same for two or three wavelengths of light. 1
- noun achromatic lens (optics) A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other. 0