Definitions

1. adjective

Optically perfect, or nearly perfect, as a lens or combination of lenses that brings to a focus two or more colors of light to the same point.

“The apochromatic lens used in this camera produces crystal-clear images with minimal color distortion.”

2. noun

A lens or combination of lenses that brings to a focus two or more colors of light to the same point.

“The apochromatic objective lens in this microscope allows for high-magnification observations with minimal color aberration.”