Effective measurements of retardation and its wavelength dispersion of compensation films for liquid crystal display

摘要

The retardation value and its wavelength dependence are the important characteristics of compensation films for high-end LCD design. We have developed an accurate and effective method to measure a retardation and normalized birefringence of stretched polymeric and polymerized liquid crystal films. To increase a measurement accuracy a residual absorption at short wavelengths is included in our consideration. The exact low and high retardation values at any visible wavelength are possible to measure using the developed method.