Dependence of the birefringence of polystyrene film on the stretching conditions

Hee Jung Ryu; Jiyong Hwang; Jongyoon Kim; Ji-Hoon Lee

doi:10.1364/AO.57.000268

Dependence of the birefringence of polystyrene film on the stretching conditions

Appl Opt. 2018 Jan 10;57(2):268-272. doi: 10.1364/AO.57.000268.

Authors

Hee Jung Ryu, Jiyong Hwang, Jongyoon Kim, Ji-Hoon Lee

PMID: 29328175
DOI: 10.1364/AO.57.000268

Abstract

We investigated the dependence of the birefringence of polystyrene (PS) film with a negative optical birefringence on the stretching conditions. We varied the stretching ratio (SR), stretching speed (SS), and stretching temperature (ST), and measured the inplane birefringence and the N_z coefficient of the PS film. The inplane birefringence was increased with greater SR and SS but decreased with greater ST. The N_z coefficient of the stretched PS film was around zero and showed similar dependence on the stretching conditions like inplane birefringence.