Measurement of the refractive index of nematic liquid crystals 5CB by means of x-ray interferometry

V. P. Mkrtchyan; L. G. Gasparyan; T. K. Dadalyan; M. K. Balyan; A. V. Kuyumchyan

doi:10.1117/12.2061695

5 September 2014 Measurement of the refractive index of nematic liquid crystals 5CB by means of x-ray interferometry

V. P. Mkrtchyan, L. G. Gasparyan, T. K. Dadalyan, M. K. Balyan, A. V. Kuyumchyan

Proceedings Volume 9207, Advances in X-Ray/EUV Optics and Components IX; 920714 (2014) https://doi.org/10.1117/12.2061695
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

In the present work the X-ray optical anisotropy of 5CB type liquid crystals has been investigated based on the method of X-ray interferometry. In this way Moire fringes have been obtained both in the absence and presence of specimens with different orientations of optical axes. The relative displacement of Moire fringes enabled us to observe and immediately ascertain the presence of X-ray optical anisotropy, to measure the values of refractive indices n_o and n_e for this specimen (n_o is the refractive index for radiation with polarization normal to the principal plain, n_e is that for radiation with polarization in the principal plain parallel to the optical axis). X-ray optical anisotropy of 5CB type liquid crystal was observed using the proposed method and values of refractive indices n_o and n_e for this specimen were measured. It was found out that 5CB type nematic liquid crystal was X-ray anisotropic optically positive medium.

Citation Download Citation

V. P. Mkrtchyan, L. G. Gasparyan, T. K. Dadalyan, M. K. Balyan, and A. V. Kuyumchyan "Measurement of the refractive index of nematic liquid crystals 5CB by means of x-ray interferometry", Proc. SPIE 9207, Advances in X-Ray/EUV Optics and Components IX, 920714 (5 September 2014); https://doi.org/10.1117/12.2061695

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