Wollaston prism polarizing beam splitters consist of two equal angle calcite prisms optically coupled with optic axis orthogonally crossed to the direction of propagation. The beam separation of about 20° is then approximately balanced about the input beam axis. The transmission range for cemented prisms of 0.32 to 2.5µm to 18° at 2.5µm. They come un-mounted or in the optional mount pictured to the right.
In this arrangement one polarization state is transmitted undeviated through the prism while the orthogonal component is deviated approximately 10°. The straight through component is clearly chromatic while the deviated beam varies from 11° at 0.32µm to 8.5° at 2.5µm.