Methods of Measuring the Pitch

Only the four most commonly used methods will be noted briefly here  

FIGURE 6.3. Dependence of the pitch of a cholesteric hehx on the concentration of cholesteryl oleylcarbonate in a nematic mixture with Ae = 7.6 at a temperature of 25 °C. 

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Other possible methods of measuring the pitch are reviewed in Refs. 33 and 34. 

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