Cholesteric application technical

The book is subdivided into three parts. The first three introductory chapters include consideration of the nature of the liquid crystalline state of matter, the physical properties of mesophases related to their electroop-tical behavior, and the surface phenomena determining the quality of liquid crystal cells giving birth to many new effects. The second part (Chapters 5-7) is devoted to various electrooptical effects in nematic, cholesteric, and smectic mesophases including ferroelectric compounds. Here major emphasis is given to explaining the physical nature of the phenomena. The last part (Chapter 8) is a rather technical one. Here recent applications of liquid crystalline materials in electrooptical devices are discussed. 

Yang DK, Doane JW (1992) Cholesteric liquid crystal/polymer gel dispersion Reflective display application. SID Symp Dig Technic Pap 23 759-761... 

The third part of the book is devoted to the medical and technical applications of liquid crystals. The colour of cholesteric liquid crystals changes with changes in temperature or other variables of state. This feature can be used in thermographic applications, for instance, thermal mapping of human skin for the diagnosis of circulatory diseases or the detection of tumors. In modern industrial applications this property is of value for direct temperature diagrams, detection of wave fields, locating faults in electronic devices and for thermally activated information displays. 

The interest in this area is due more to the possibilities of technical application than theoretical considerations. Gurova, Kapustina, and Lupanov were the first to transform the uniform planar texture of a nematic/cholesteric mixture sample into a focal-conic one by means of an ultrasound field [17,59]. The helical structure is still present in this state, having the same pitch on a microscop-... 

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