Electrooptical dynamic scattering

Thermotropic cholesterics have several practical applications, some of which are very widespread. Most of the liquid crystal displays produced use either the twisted nematic (see Figure 7.3) or the supertwisted nematic electrooptical effects.6 The liquid crystal materials used in these cells contain a chiral component (effectively a cholesteric phase) which determines the twisting direction. Cholesteric LCs can also be used for storage displays utilizing the dynamic scattering mode.7 Short-pitch cholesterics with temperature-dependent selective reflection in the visible region show different colors at different temperatures and are used for popular digital thermometers.8... [Pg.428]

Heilmeier, G., Zanoni, L.A., Barton, L.A. Dynamic scattering anew electrooptic effecting certain classes of nematic liquid crystals. Proc. I.E.E.E 56, 1162-1171 (1968)... [Pg.341]

From the optical standpoint the outstanding properties of dynamic scattering are that it can be electrically controlled in two dimensions and the active motion of the scattering centers. By utilizing the property that dynamic scattering can be electrically controlled, it is possible to build electrooptic devices with transmission characteristics that can be controlled in two dimensions and as a function of time. Such devices can lead to new real time techniques in ultrasonic and microwave holography and in coherent optics data processing. [Pg.153]

G. H. Heilmeier, L. A. Zanoni, and L. A. Barton, Dynamic Scattering A New Electrooptic Effect in Certain Classes of Nematic Liquid Crystals, Proc. IEEE, Vol. 56, p. 1162... [Pg.28]