Switchable large-aperture liquid-crystal diffractive lenses
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Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Natl Inst Optoelectronics
Abstract
Switchable large aperture liquid crystal Fresnel diffractive lenses with aperture diameters of 20-30 mm were designed, fabricated, and demonstrated experimentally with multiple 2 pi radian phase modulation in each Fresnel zone. The structure design with multiple 2 pi radian phase modulation in each Fresnel zone can reduce difficulty in micro-fabrication of the lenses. The influence of electrode gaps of Fresnel lenses on their diffraction efficiencies was examined by numerical analysis. The lenses showed fast switching speed, low driving voltages (<2 V), and high diffraction efficiencies (>62%). They have potential to be applied for autofocus imaging devices and adaptive optics system.
Description
Keywords
Materials science, Optics, Physics, Diffractive lenses, Liquid-crystal devices, Voltage, Adaptive optics, Adaptive systems, Diffraction efficiency, Efficiency, Liquid crystal displays, Phase modulation, Liquid crystals, Adaptive optics systems, Aperture diameter, Diffractive lens, Fast switching, Fresnel diffractive lens, Liquid crystal devices, Low driving voltage, Structure design
Citation
Xia, J. ve Demirer, M. (2017). ''Switchable large-aperture liquid-crystal diffractive lenses''. Journal of Optoelectronics and Advanced Materials, 19(7-8), 449-453.