Figure 6

Speckle contrast maps measured for the chiral nematic LC device (E7 + 5.1 wt% BDH1281, pitch 273 nm) for four different operating temperatures. The cells tested were nominally 20 µm-thick and the cell temperature throughout measurements was (a) T = 25 °C, (b) T = 35 °C, (c) T = 45 °C, (d) T = 55 °C.