polarizing beam splitter (PBS)
A polarization splitter (PBS) is a cubic glass body that polarizes light in different oscillation planes. Light incident on a polarization splitter is transmitted by the polarization splitter in only one plane of vibration.
At the same time, light components are reflected at the separating layer within the PBS splitter and polarized in a second plane of oscillation. The two differently polarized light beams emerge at different points of the glass cube. The emerging polarized light has a high light transmission in both the transmission and reflection directions, well above 90 %.
The principle of the polarization splitter can be used in reverse as a polarization combiner for combining polarized light. Polarization splitters and combiners are used in optical fiber technology, optical networks, DVD drives and in various projectors.