Patent ID: 7310145
Filing Date: 2007-12-18
Classification: G01N

Abstract:
1. A method for producing an anisotropic material having a first physical property comprising: (a) determining the optical retardation value of the anisotropic material, said step of determining the optical retardation value comprising: polarizing a light beam having at least a portion of the wavenumbers between about 4,000 to about 10,000 cm passing the polarized light beam through the material to obtain a transmitted beam; polarizing the transmitted beam to obtain a polarized transmitted beam; detecting the polarized transmitted beam; collecting an absorbance or transmission spectra as a function of wavenumbers; and calculating the optical retardation value of the material using the spectra; (b) monitoring the optical retardation value determined in step (a); and (c) adjusting a process parameter using the optical retardation value monitored in step (b) to optimize the first physical property of the material.