Narrowband Beamsplitter Cube

The beamsplitter cube functions optimally when the input light is randomly polarized (natural light). If the input light is linearly polarized, the output T/R ratio will not be 50/50. A narrowband beamsplitter cube is designed to split light based on a specific wavelength or a narrow range of wavelengths. It selectively reflects or transmits light at one wavelength while allowing other wavelengths to pass through unaffected. In contrast, a polarizing cube beamsplitter splits light based on its polarization state. It reflects s-polarized light (with the electric field perpendicular to the plane of incidence) and transmits p-polarized light (with the electric field parallel to the plane of incidence).

Applications: Commonly used in laser systems, spectroscopy, or any application where precise wavelength filtering and splitting are necessary.

Narrowband Beamsplitter Cube

Factory Standard

• Material: Schott, Ohara, CDGM Optical Glass, Corning fused silica, JGS1, JGS2
• Dimension Tolerance: +/- 0.2mm
• Flatness: l/4 @ 632.8 nm
• Surface Quality: 60/40 scratch and dig
• T/R: 50/50+/- 5% for natural light
• T=(Ts+Tp)/2, R=(Rs+Rp)/2
• Beam Deviation: <3 arc minutes
• Coatings:
  Single wavelength partial reflectance: on hypotenuse face
  “V” AR-coatings: on all input and output face

Contact us for manufacturing limits or custom specifications.

Narrow Band Beamsplitter Cube