A polarizing beamsplitter cube (PBS) is a special type of beamsplitter that separates a light beam based on its polarization state. It is structurally similar to a cube beamsplitter, formed by cementing two right-angle prisms together. The key difference lies in the coating on the cemented interface: instead of a standard beamsplitting film, it is coated with a polarizing beamsplitting film. Its core function is to separate a beam of unpolarized or mixed-polarization light into two beams of linearly polarized light with mutually perpendicular vibration directions.
High polarization purity and extinction ratio
High splitting efficiency
Sensitive to angle of incidence and wavelength
| Material | H-zf3 |
| Surface Flatness | λ/10@633nm |
| Transmitted Beam Deviation | ±5' |
| Reflected Beam Deviation | 90°±5′ |
| Extinction Ratio | TP/TS＞1000 |
| Dimension Tolerance | ±0.2mm |
| Surface Quality | 40/20-60/40 |
| Coating | Hypotenuse splitting film + AR coatings on other surfaces |
