Polarizing Beamsplitter Cubes

1、What is a Polarizing Beamsplitter Cube?

A polarizing beamsplitter cube consists of two right angle prisms cemented together. The hypotenuse face of one prism is coated with a special multi layer dielectric coating. When circularly polarized or natural light enter the cube vertically, it separated into two linearly polarized beams. The transmitted beam  is P-polarized while the reflected beam is S-polarized.  And when a linearly polarized light come in, it similarly divided into two beams. But the energy ratio of the two outgoing beams depend on the polarization of the incident beam. Polarizing beamsplitter cubes are available for many laser wavelengths and broadband ranges.

2、How does a polarizing beamsplitter Cube work?

Polarizing Beamsplitter are designed to split unpolarized light at a specific Reflection/Transmission (R/T) ratio with unspecified polarization tendencies. 

Polarizing beamsplitters are designed to split light into reflected S-polarized and transmitted P-polarized beams.

3、What is a Polarizing beamsplitter Cube used for?

Beamsplitter is also a kind of filter, it is used to split or combine laser beam. However Polarization BeamSplitters are used to split or combine two perpendicular polarization laser beam. The performance of beam splitter depends on the coating specifications.  They are common components in laser or illumination systems. Also ideal for fluorescence applications, optical interferometry, or life science or semiconductor instrumentation. Light can be split by percentage of overall intensity, wavelength, or polarization state. 

To select a suitable beamsplitter, you need to consider the type, coating, transmission range and damage threshold. 

Specifications: