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Proceedings Paper

Dielectric permittivity imaging based on a liquid crystal capacitive sensor
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Paper Abstract

A method and system for imaging objects based on sensing their dielectric permittivity at low frequencies of few kHz are presented. The system is composed of three regions: Liquid Crystal (LC) layer, buffer layer and a cavity in which the analyzed samples are inserted. When a voltage is applied, it falls partially on the LC causing its molecules to tilt. The amount and distribution of the voltage depend on the dielectric permittivity of the analyzed samples. The permittivity distribution is imaged by reading the retardation changes in the LC with visible light in reflection and transmission modes. The resolution limit of the system is predicted theoretically using rigorous simulation showing possible resolution down to few tens of microns.

Paper Details

Date Published: 25 August 2017
PDF: 7 pages
Proc. SPIE 10361, Liquid Crystals XXI, 103610U (25 August 2017); doi: 10.1117/12.2273339
Show Author Affiliations
Amir Aizen, Ben-Gurion Univ. of the Negev (Israel)
Ibrahim Abdulhalim, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 10361:
Liquid Crystals XXI
Iam Choon Khoo, Editor(s)

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