The ARTIFEX Glan Thompson Polarizer is a type of a beam splitter. This device is equipped with two calcite prisms that is cemented together. The Glan Thompson Polarizer is made up of a calcite material is equipped with a mount made from black anodized aluminium. This beamsplitter operates with a wavelength ranging from 350nm up to 2300nm and has a beam deviation of < 3 arc minutes.