We propose using the anisotropic molecule dope method for synthesizing a zero-birefringence polymer that showed no orientational birefringence at any orientation degree of polymer chains. In this method a rodlike molecule with polarizability anisotropy was chosen to compensate orientational birefringence. The zero-birefringence polymer was synthesized by doping of 3-wt.% <i>trans</i>-stilbene as an anisotropic molecule into poly(methyl methacrylate). The zero-birefringence at the 590-nm wavelength in the drawn film and the injection-molded plate made from the zero-birefringence polymer was confirmed by the rotating parallel nicols method. Furthermore, high transparency (37.2 dB/km) of the zero-birefringence polymer at the 633-nm wavelength was confirmed by the light-scattering measurement.
© 2001 Optical Society of America
Akihiro Tagaya, Shuichi Iwata, Eriko Kawanami, Hisashi Tsukahara, and Yasuhiro Koike, "Zero-Birefringence Polymer by the Anisotropic Molecule Dope Method," Appl. Opt. 40, 3677-3683 (2001)