@ARTICLE{Bennis_N._Real_2017, author={Bennis, N. and Merta, I. and Kalbarczyk, A. and Maciejewski, M. and Marc, P. and Spadlo, A. and Jaroszewicz, L.R.}, volume={vol. 25}, number={No 2}, journal={Opto-Electronics Review}, pages={69-73}, howpublished={online}, year={2017}, publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology}, abstract={We propose real time phase measurements in liquid crystals cells using Young's interferometer constructed with a new principle with possibility to control the distance between two point sources. The optical interference optical pattern is detected by a bicell photo-detector in a back Fourier focal plane. A phase modulation controlled by a monopixel liquid crystals’ cell placed in a reference arm of interferometer is observed as a dynamic shift of the fringes’ pattern in spatial domain. Concept of signals’ demodulation in the Fourier focal plane will be described using a new approach to the demodulation signals. In this work we evaluate the demodulation condition of our setup and we present measurements of a dynamic phase response for nematic liquid crystals and antiferroelectric liquid crystals cells.}, type={Article}, title={Real time phase modulation measurements in liquid crystals}, URL={http://journals.pan.pl/Content/115350/PDF/main.pdf}, keywords={Young interferometer, Dynamic phase demodulation, Antiferroelectric liquid crystal, Surface electroclinic effect}, }