• 20 mm Cube
• Wavelength Range: 620 - 1000 nm
• Extinction Ratio: TP:TS > 1000:1

This polarizing beamsplitting cube separates the S and P polarization components by reflecting the S component at the dielectric beamsplitter coating, while allowing the P component to pass. For the highest polarization extinction ratio, use the transmitted beam, which offers an extinction ratio of TP:TS > 1000:1. As a guideline, the reflected beam will have an extinction ratio of roughly 100:1. This cube is made from N-SF1 and is coated for 620 - 1000 nm.

The dielectric beamsplitting coating is applied to the hypotenuse of one of the two prisms that make up the cube. Then, cement is used to bind the two prism halves together. Light can be input into any of the polished faces to separate the s- and p-polarizations. However, for best performance, the light should enter through one of the entrance faces of the coated prism, which are indicated by a dot.

• Coating Range: 620 - 1000 nm
• AR-Coating Reflection: R_avg < 0.5% @ 0° AOI
• Dimensional Tolerance: ±0.2 mm
• Material: N-SF1
• Extinction Ratio: Tp:Ts >1,000:1
• Transmission Efficiency: Tp > 90%
• Reflection Efficiency: Rs > 99.5%
• Transmitted Beam Deviation: <5 arcmin
• Reflected Beam Deviation: 90° ± 5 arcmin
• Clear Aperture: >80% of Dimension
• Surface Flatness: λ/10 @ 633 nm
• Wavefront Distortion: <λ/4 @ 633 nm
• Surface Quality: 40-20 Scratch-Dig