Liquid Crystals in Nondestructive Testing
1968; Optica Publishing Group; Volume: 7; Issue: 9 Linguagem: Inglês
10.1364/ao.7.001729
ISSN0003-6935
Autores Tópico(s)Optical Polarization and Ellipsometry
ResumoThe cholesteric phase is associated with scattering effects that give rise to iridescent colors, the dominant wavelength being influenced by very small changes in temperature, which can be as large as 1000 A shift per degree. This unusually high temperature sensitivity has given rise to the use of the cholesteric phase as a sensitive thermometer and thermal mapping media. This paper reviews the optical effects in the cholesteric phase with some new additions that are particularly relevant to thermal mapping. An attempt has been made to give a complete picture of the cholesteric liquid crystal as applied to nondestructive testing, rather than to review the work actually being done in this field.
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