This has only ever been achieved in conventional lenses by stacking multiple lenses. (sciencedaily.com)
Another is an ultrathin, flat lens that focuses light without imparting the distortions of conventional lenses. (sciencedaily.com)
While examining the capabilities of optical microscopes to inspect semiconductors during manufacturing, I started to wonder if there was a way to get images with much higher spatial resolution than 250 nanometers using conventional lenses. (kavliprize.org)