A 1 mm × 1 mm nematic liquid-crystal three-terminal device for optical beam forming (focusing/spoiling) is fabricated. A thin-film-resistor network on the device substrate layer is used to control the voltages on the 98 internal lens electrodes by use of only one variable external driver. By using a high-resistance thin-film layer of amorphous silicon under the 98-element parallel electrode structure layer, we generate a near-continuous index perturbation to form a cylindrical lens. The focal length of this lens is continuously variable from inifinity to 12 cm by use of a variable 1–4-V-peak 1-kHz square-wave external terminal control signal.
© 1994 Optical Society of America
Original Manuscript: March 16, 1994
Published: July 15, 1994
Nabeel A. Riza and Michael C. DeJule, "Three-terminal adaptive nematic liquid-crystal lens device," Opt. Lett. 19, 1013-1015 (1994)