Polymer Film, Optically-Compensatory Film, Process for Producing the Same, Polarizing Plate and Liquid-Crystal Display Device

摘要

A polymer film that has: a ratio R (VT/VM) of a sound velocity in a transverse direction VT to a sound velocity in a machine direction VM of from 1.05 to 1.50; and an in-plane retardation Re(lambda) and a thickness-direction retardation Rth(lambda) satisfying formula (I): (I) 0<=Re(630)<=10, and |Rth(630)|<=25, wherein Re(lambda) represents an in-plane retardation at a wavelength of lambda (nm); and Rth(lambda) represents a thickness-direction retardation at a wavelength of lambda (nm).