Twisted wedges for the measurement of long pitch lengths in chiral nematic liquid crystals

Abstract

A new method is described for the measurement of long pitch lengths in chiral nematic liquid crystal materials using wedges with twisted alignments on the two surfaces.

*The research was performed in part at the Department of Chemistry, The University of York, Heslington, York YO10 5DD, UK

Acknowledgements

The author would like to thank Merck Chemicals Ltd for providing the doped sample of E70A and E7, and Professor J. W. Goodby and Dr S. C. Cowling for many helpful discussions during his visit to York University. He would also like to thank the Liquid Crystal Group in York for their kind hospitality during his stay.

Notes

*The research was performed in part at the Department of Chemistry, The University of York, Heslington, York YO10 5DD, UK