Optical Components, Detectors, and Displays

Continuously controllable, wide-angle liquid crystal beam deflector based on the transversal field effect in a three-electrode cell

[+] Author Affiliations
Boris Apter

Holon Institute of Technology, Department of Electrical and Electronic Engineering, Holon 58102, Israel E-mail: apter@hait.ac.il

Eldad Bahat-Treidel

Ben-Gurion University, Department of Electro-Optical Engineering, Beer-Sheva 84105, Israel

Uzi Efron

Ben-Gurion University, Department of Electro-Optical Engineering, Beer-Sheva 84105, Israel

Holon Institute of Technology, Department of Electrical and Electronic Engineering, Holon 58102, Israel

Opt. Eng. 44(5), 054001 (May 11, 2005). doi:10.1117/1.1911125
History: Received Jul. 7, 2004; Revised Dec. 2, 2004; Accepted Dec. 3, 2004; May 11, 2005; Online May 11, 2005
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A controllable, refractive, electro-optical liquid crystal (LC) beam deflector is studied both theoretically and experimentally. The principle of operation of this device is based on a beam deflection from a large gradient of refractive index, generated in an LC layer by a transversal electric field, formed between two lateral electrodes, in a simple three-electrode LC cell. A continuous, controllable deflection of a Gaussian laser beam, focused into the narrow region at the electrode gap is demonstrated. Maximum deflection angles of ∼18 to 25 deg, depending on the LC birefringence, as well as a high deflection efficiency of up to 98% are demonstrated experimentally, backed by a theoretical analysis. © 2005 Society of Photo-Optical Instrumentation Engineers.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Boris Apter ; Eldad Bahat-Treidel and Uzi Efron
"Continuously controllable, wide-angle liquid crystal beam deflector based on the transversal field effect in a three-electrode cell", Opt. Eng. 44(5), 054001 (May 11, 2005). ; http://dx.doi.org/10.1117/1.1911125


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