A Fourier-transform-based interferometric technique for measuring the elastic anisotropy of a nematic liquid crystal

Year: 1998

Authors: De Feo D., De Nicola S., Ferraro P., Maddalena P., Pierattini G.

Autors Affiliation: INFM, Dipartimento di Scienze Fisiche, Università di Napoli ‘Federico II’, Complesso Univ. M te S Angelo, Pal. G-H, Via Cintia, I-80126, Naples, Italy Istituto di Cibernetica CNR, Via Toiano 6, I-80072 Arco Felice (NA), Italy IPSIA ‘G L Bernini’, Via Arco Mirelli 19/a, I-80122 Naples, Italy

Abstract: We propose a method based on an interferometric technique to measure the molecular distortion induced by an incident light beam on a nematic liquid crystal film. An analysis of
the fringe pattern generated by means of a Fourier transform method allows comparison of the measurements with the theoretical molecular distribution. From this analysis an estimation of the elastic anisotropy of the liquid crystal is derived which is in good agreement with previous results.

Journal/Review: PURE AND APPLIED OPTICS

Volume: 7 (6)      Pages from: 1301  to: 1308

KeyWords: interferometry; liquid crystals; optics; elastic constants;

Citations: 5
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