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Optical Engineering

Continuously controllable, wide-angle liquid crystal beam deflector based on the transversal field effect in a three-electrode cell
Author(s): Boris Apter; Eldad Bahat-Treidel; Uzi Efron
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Paper Abstract

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.

Paper Details

Date Published: 1 May 2005
PDF: 7 pages
Opt. Eng. 44(5) 054001 doi: 10.1117/1.1911125
Published in: Optical Engineering Volume 44, Issue 5
Show Author Affiliations
Boris Apter, Holon Institute of Technology (Israel)
Eldad Bahat-Treidel, Ben-Gurion Univ. of the Negev (Israel)
Uzi Efron, Ben-Gurion Univ. of the Negev (Israel)

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