  We developed a method to measure the phase retardation and birefringence of
muscovite mica plate in the temperature range of 223K to 358K within the
spectrum of 300 to 700 nm. The phase retardation data is gained through the
standard transmission ellipsometry using spectroscopic ellipsometer. With the
phase retardation and thickness of the mica plate we can calculate its
birefringence dispersion. Our results give abundant phase retardation and
birefringence data of muscovite mica in the ultraviolet and visible spectrum
from 223K to 358K. From the experimental data, the phase retardation and
birefringence will drop down at the fixed wavelength when the temperature
rises. The accuracy of the birefringence of mica plate is better than 3.5e-5.
