Beschreibung:
<jats:title>Abstract</jats:title><jats:p>The helical structure of cholesteric mixed systems and their electro‐optical behaviour are studied at planar and pretilted surface orientation. The results indicate that the influence of the forces of wall orientation is decreased by the helical structure. To prove this model strong and weak anchoring conditions of the molecules in the cholesteric mixture at the substrate surface are realized. Also the behaviour of the electro‐optical threshold voltage at different surface conditions supports the assumptions concerning the helical structure.</jats:p>