Abstract

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.

© 1969 Optical Society of America

Electrophotographic Imaging with Cholesteric Liquid Crystals

W. Haas and J. Adams
Appl. Opt. 7(6) 1203-1206 (1968)

Photoconduction in Homogeneous Photoplastic Recording Film

R. F. Kopczewskl and H. S. Cole
Appl. Opt. 8(S1) 156-160 (1969)

Liquid Crystals in Nondestructive Testing

James L. Fergason
Appl. Opt. 7(9) 1729-1737 (1968)

Fields of Electrostatic Images and Their Effect on Development of Visible Pictures

Hans E. J. Neugebauer
Appl. Opt. 8(S1) 76-78 (1969)

Electric-field-induced motion of polymer cholesteric liquid-crystal flakes in a moderately conductive fluid

Tanya Z. Kosc, Kenneth L. Marshall, Stephen D. Jacobs, John C. Lambropoulos, and Sadeg M. Faris
Appl. Opt. 41(25) 5362-5366 (2002)