Operating Principle:
Using thin-film interference or birefringence effects (e.g., Wollaston prisms, Glen-Taylor prisms), incident light is decomposed into:
S polarized light (perpendicularly polarized, reflected light)
P polarized light (parallel polarization, transmitted light).
The splitting ratio is highly dependent on the state of polarization, e.g. 50:50 PBS will separate unpolarized light by state of polarization rather than equally by energy.

Characteristics:
Polarization dependent: the spectral separation effect is directly related to the polarization state of the incident light.
High extinction ratio: ideally, reflected light is purely S-polarized and transmitted light is purely P-polarized.

Application scenarios: laser systems, polarized imaging, optical isolators, quantum optics, and other fields that require polarization control.

Polarizing Beamsplitter (PBS)
Material	BK7 or ZF
Dimension	3×3mm-50×50mm
S/D	60/40, 40/20
Flatness	λ/4 - λ/10
Transmission	Tp＞95%
Reflection	Rs＞99%
Extinction Ratio	300:1, 1000:1
Wavelength	VIS(400-700nm)
Application	diode,gas laser,solid-state laser