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A Glan–Thompson prism consists of two right-angled prisms made of calcite or other birefringent material, cemented together by their long faces. Due to birefringence, the light incident on the prism splits into two rays, experiencing different refraction - the p-polarized ray (ordinary ray) is totally internally reflected from the calcite-cement interface, leaving the s-polarized ray (extraordinary ray) to be transmitted. Hence this prism acts as a polarizing beam splitter. Glan-Thompson polarizers are ideal for Ultraviolet, Visible, or Near Infrared applications. They have a wide acceptance angle with superior broadband performance and low wavefront distortion.