Polarizing cube beamsplitters split randomly 

polarized beams into two orthogonal, linearly 

polarized components: S-polarized light is reflected 

at a 90 deg angle while P-polarized light is transmitted. 

Each beamsplitter consists of a pair of precision high 

tolerance right angle prisms cemented together with a 

dielectric coating on the hypotenuse of one of the prisms. 

A multi-layer antireflective coating has been applied to

 each face of the beamsplitter in order to produce maximum 

transmission efficiency.