Electrically tunable lens with a non-monotonic wavefront control capability.
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DOI: 10.1364/ol.465018
Abstract: We describe an electrically tunable liquid crystal lens that can produce a rich variety of wavefronts, including sombrero-type (non-monotonic) phase modulation, enabling the focusing of light into a ring-shaped intensity distribution. The lens can also… read more here.
Keywords: electrically tunable; lens non; monotonic wavefront; non monotonic ... See more keywords