Scatterings
Flat Lens Zooms Fast
An adaptive liquid crystal (LC) diffractive lens developed at the University of Arizona (U.S.A.) focuses with high efficiency and zooms with millisecond-fast switching times.
A test photo, placed at differing distances from the lens, shows the focusing ability of the diffractive liquid crystal lens when no voltage is applied (a) and when focal length is 40 cm (b), 20 cm (c), 13.3 cm (d), 10 cm (e) and 6.6 cm (f).
An adaptive liquid crystal (LC) diffractive lens developed at the University of Arizona (U.S.A.) focuses with high efficiency and zooms with millisecond-fast switching times. Doctoral student Pouria Valley and colleagues at the University of Arizona (U.S.A.) reported a lens based on a 3-µm-thick layer of nematic liquid crystals (P. Valley et al. “Tunable-focus flat liquid crystal diffractive lens,” Opt. Lett. 35, 336).
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