DOI: 10.17863/cam.5955
title: Research data supporting "Characterisation, design, and optimisation of a two-pass twisted nematic liquid crystal spatial light modulator system for arbitrary complex modulation"

description: This is data in support of the publication 'Characterisation, design, and optimisation of a two-pass twisted nematic liquid crystal spatial light modulator system for arbitrary complex modulation.' This directory contains the data pertaining to the paper 'Characterisation, design, and optimisation of a two-pass twisted nematic liquid crystal spatial light modulator system for arbitrary complex modulation', by Macfaden & Wilkinson (2016). Descriptions of these data files are as follows: FIG 2: These files contain sufficient data to determine the Jones matrices which represent the SLM. - One pass no SLM.xls This is the data corresponding to Figure 2(a1). - One pass with SLM off.xls This is the data corresponding to Figure 2(a2); the relative amplitude transmission with the SLM present but off. -Two pass with SLM.xlsx Each of two sheets contains the amplitude transmission under different SLM levels, polariser angles, and analyser angles for the two-pass scenario when the other half of the SLM is at level 0. A subset of this data corresponds to FIgure2(a3) - Two pass with SLM, Ronchi gratings.xlsx With the polariser and analser fixed at 0 degrees, the transmission through the SLM when Ronchi gratings are shown on the first and second half of the SLM. In each case, the other half is held at level 0, as is the static stripe composing the Ronchi grating FIG 3: - Measured Jones matrices.xlsx The determined Jones matrices shown in Figure 3(a). The column headings are for the labelled components A,B,C,D of the two sides 1,2. The labels x,y correspond to the real,imaginary parts of the matrix element rexpectively. - eigenvalues.mat & eigenvectors.mat The polarisation eigenvalues and eigenvectors --- from which Figure 3(b) was generated --- are complex numbers. Hence, they are saved as MATLAB .mat files. eigenvalues.mat is a 2x256x2 matrix. The dimensions correspond to [SLM half, SLM level, eigenvalue number] eigenvectors.mat is a 2x256x2x2 matrix. The dimensions correspond to [SLM half, SLM level, eigenvector number, eigenvector column vector]. FIG 4: - Figure4.fig The MATLAB figure file containing the raw figure. -Fig4 allStates.xlsx All of the accessible states in Figure 4(a) -Fig4 modulationPoints.xlsx On separate sheets, the target modulation points, actual modulation points, and the SLM levels required to achieve them. -Fig4 characterisation. On separate sheets, the amplitude only characterisation, theoretical and obtained Ronchi grating results. FIG 5: - Figure5.fig The MATLAB figure file containing the raw figure -Fig5 allStates.xlsx All of the accessible states in Figure 5(a) -Fig5 modulationPoints.xlsx On separate sheets, the actual nearest ,modulation points used, and the corresponding SLM levels. - Fig5 characterisation.xlsx The characterisation data in Figure 5(b). This contains the flat field and Ronchi characterisation data. FIG 6: - Figure6.fig The MATLAB figure file containing the raw figure. - Fig6 displacements.xlsx On separate sheets: the coefficients of the Taylor series approximation; and the characterisation data. FIG 7: - Figure7.fig The MATLAB figure file containing the raw figure. - Fig7 correction.xlsx On separate sheets: the coefficients of the Taylor series approximation; the amplitude characterisation; and the Ronchi amplitudes.
description: EPSRC [EP/G037256/1], Optalysys Ltd, ICASE Studentship