Home / Custom / Optical Components / Optical Prism / Cube Beamsplitter 
Polarizing cube beamsplitters split randomly polarized beams into two otehogonal, linearly, polarized compoments, S-polarized light is reflected at a 90° while P-polarized light is transmitted. Each beamsplitter comsists of a pair of percision high tolerance right angle prisms cemented together with a dielectric coating on the hypotenuse of one of prisms.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
| Material | Optical glass BK7 / ZF glass |
|---|---|
| Dimension tolerance | ±0.1mm |
| Flatness | λ/4 @ 632.8nm |
| Surface quality | 60/40, 40/20 |
| Angle tolerance | <3arc min~ 30 arc sec. |
| Principal transmittance | Tpave > 96%, Ts,1% (Narrowband) |
| Tpave > 95%, Ts,1% (Broadband) | |
| Principal reflectance | Rs>99%, Rp<5% |
| Coating | Hypotenuse face: Polarization beamsplitter coating; All input and output face: AR Coating |
| Type No. | Size(mm) |
|---|---|
| CBP-5 | 5×5×5 |
| CBP-10 | 10×10×10 |
| CBP-12.7 | 12.7×12.7×12.7 |
| CBP-15 | 15×15×15 |
| CBP-20 | 20×20×20 |
| CBP-25.4 | 25.4×25.4×25.4 |
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