Multilevel Diffractive Lens
A very large diameter (~100 mm) flat multi-level diffractive lens that is achromatic across the full visible spectrum. The photograph was taken by illuminating the lens from behind using a white light LED flashlight. Location: University of Utah. Lens fabrication: Monjurul Meem, University of Utah Photograph: Apratim Majumder, University of Utah
—Apratim Majumder, University of Utah, U.S.A.
