Optical injection molded parts are used in many different industries including electronics, consumer, medical and
automotive due to their cost and performance advantages compared to alternative materials such as glass. The injection
molding process, however, induces elastic (residual stress) and viscoelastic (flow orientation stress) deformation into the
molded article which alters the material’s refractive index to be anisotropic in different directions. Being able to predict
and correct optical performance issues associated with birefringence early in the design phase is a huge competitive
advantage. This paper reviews how to apply simulation analysis of the entire molding process to optimize
manufacturability and part performance.