Polymer Retarder Film is an extremely durable, birefringent polymer sheet that has been designed to modify the polarization state of transmitted light. The highly transparent, achromatic λ/4 (WP140HE) Polymer Retarder Film consists of a single layer, modified polycarbonate sheet that acts an achromatic retarder, and is optically and mechanically sound up to 90°C or 80°C respectively. Ideal for use in a variety of coherent and polarized light applications, including circular polarizers, LCDs, and fiber optics.