Partial Reflective Beamsplitter, the main function is to split the light into two, they can be prisms glued cube or single flat piece of optical glass coated with this kind of film. It can be single point or broad band of the light for beams splittering. PHYO makes different Beam splitters including the PBS cubes as a polarized and dichroic coating. - Broadband beamsplitters in different incident angle (AOI) - Polarizing Beamsplitters cubes   
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Optical Windows
