A new type of beam scanner is discussed based on a 1-D Fresnel zone plate consisting of titanium-diffused channel waveguides on LiNbO3. By electrooptically controlling the guided-wave phase, both beam scanning and 1-D focusing are achieved without a condensing lens. It was experimentally confirmed using the scanner with twenty-one Fresnel zones that the beam spot with a diameter of ~50µm at at half-power level of diffraction pattern is scanned over a distance of ±70 µm in the focal plane with an applied voltage of ±40 V at 633 nm.
© 1983 Optical Society of America
K. Takizawa, "Electrooptic Fresnel lens-scanner with an array of channel waveguides," Appl. Opt. 22, 2468-2473 (1983)