Abstract
Liquid crystals are frequently used as active diffractive optical elements [1,2]. These materials offer several advantages, including rapid response [3], large aperture, and low cost. The simplest liquid crystal diffractive structure is a one dimensional grating comprised of a linear array of electrodes [4], Application of different voltages along the electrode array results in a multi-level phase structure which may take the form of a blazed grating or phased array. For such devices, the phase front across the grating aperture is constructed from periodic and quantized phase steps up to 2π.
© 1996 Optical Society of America
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