Describes a lens system that combines achromatic color correction with a flattened field of view. This ensures that an image remains sharply focused and color-true from the center all the way to the edges, which is critical for imaging flat samples or projecting uniform grid patterns.
Heard on the job
Swap in the planachromatic objective so the edges of the reticle don't blur out on the monitor.
Also heard as
- plan achromat