LANTHANUM-MODIFIED LEAD-ZIRCONATE-TITANATE CERAMIC WAFER-BASED ELECTROOPTIC DYNAMIC DIVERGING LENS

We present a lanthanum-modified lead zirconate titanate (PLZT) ceramic wafer-based electro-optic dynamic diverging lens. A quadratic refract ive-index modulation is induced by application of a linearly changing electrical field inside a flat PLZT wafer. The design offers a simple and compact structure that produces a smooth phase modulation distribu tion. A fabricated dynamic lens of 2 mm x 2 mm demonstrates a continuo us variable focal length from infinity with no applied voltage to nega tive 0.77 m with a voltage of 400 V. (C) 1996 Optical Society of Ameri ca