a lens designed to bring light of two chosen wavelengths to the same focal point, thus reducing chromatic aberration
Compare apochromat
2.
a person who has no colour vision at all and can distinguish only black, white, and grey. The condition is very rare
Examples of 'achromat' in a sentence
achromat
The latest generation of storage ring-based light sources employs multibend achromat lattices to achieve ultralow emittance.
S. C. Leemann 2014, 'Interplay of Touschek scattering, intrabeam scattering, and rf cavities in ultralow-emittancestorage rings', Physical Review Special Topics. Accelerators and Beamshttp://doi.org/10.1103/PhysRevSTAB.17.050705. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)