A single-layer of nano-structures on the surface of optical elements can correct chromatic aberrations across the visible spectrum, from simple lenses to “the super-complex objectives with as many as 14 conventional lenses, used in high-resolution microscopes”, according to Harvard University which has developed the technique. It has been dubbed ‘metacorrection’, and relies on pillars whose ...

This story continues at Meter-surface corrects chromatic abberation

Or just read more coverage at Electronics Weekly