Non Polarizing Beam Splitter Cube

Thorlabs offers non polarizing cube beamsplitters for visible 400 700 nm nir 700 1100 nm and ir 1100 1600 nm light.

Non polarizing beam splitter cube.

Non polarizing cube beamsplitter consists of a pair of precision high tolerance right angle prisms cemented together with a metallic dielectric coating on the hypotenuse of one of the prisms. Custom facets chamfers notches and other features are also available. Negligible absorption for true 50 50 beamsplitting. The hypotenuse is coated with an all dielectric non polarizing partial reflection coating.

Incoming beams are both transmitted and reflected 45 with the s and p polarized components matched to within 10. Beamsplitter cubes are available with split ratios of 30 70 50 50 or 70 30 and in sizes of 5 mm 10 mm 20 mm and 25 4 mm. Absorption loss to the coating is 10 but due to the metallic material of the coating cubes do not change polarization of the incident beam. They are designed for applications in which it is necessary to maintain the polarization characteristics of the incident beam.

Even power split ratio insensitive to polarization. All varieties of beam splitters are available in a wide selection of sizes and glass types with tight surface quality angles dimensions flatness and transmitted wavefront requirements. Broadband and chromatically neutral. Cubes are constructed by cementing two precision right angle prisms together with metallic dielectric coating on the hypotenuse surface.

Each cube is fabricated from n bk7 and designed for minimal beam offset. Techspec broadband non polarizing cube beamsplitters consist of a pair of precision high tolerance right angle prisms cemented together with a metallic dielectric coating on the hypotenuse of one of the prisms. No phase shift between s p pol. These cubes provide a 10 90 30 70 50 50 70 30 or 90 10 beamsplitting ratio with a minimal dependence on the polarization of the incident light see the tables below for the polarization split ratio tolerances.

The low polarization dependence of the metallic dielectric hybrid coating allows the transmission and reflection of s and p polarization states to be within 6 of each other. Beam splitter designs in its most common form a cube it is made from two triangular glass prisms which are glued together at their base using polyester epoxy or urethane based adhesives. Thorlabs non polarizing beamsplitter cubes are offered here with broadband ar and beamsplitter coatings designed for 400 700 nm. Our broadband non polarizing hybrid cube beamsplitters are ideal for use with multiple lasers or tunable sources.

Non polarizing cube beamsplitters are formed from two right angle 45 prisms permanently cemented together.