Imagewise deformation and color change of liquid crystals in electric fields.
Liquid crystals can be used in deformation imaging. In addition, unique color changes can be produced in suitable cholesteric liquid crystals. This paper describes two processes involving imagewise deformation and color change of liquid crystal films. The first process is due to electrophoretic action in electric fields and the second to uv induced effects. The anomalous optical properties of liquid crystals are discussed in terms of a physical model which also provides a basis for understanding the mechanism responsible for the color change associated with deformations.
Haas
W
W
Adams
J
J
Wysocki
J
J