TOPAS® cyclic olefin copolymer (COC) is in many ways the closest polymer to glass for advanced optical applications:
The light transmission of TOPAS is among the highest of all polymers:
TOPAS delivers excellent clarity, birefringence and other key properties for technical applications:
TOPAS exhibits refractive index stability across wavelengths and temperatures.
Data for TOPAS 5013:
Refractive index data for several TOPAS grades: