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Rhombic prisms are used to displace a beam laterally without changing its direction. They may be coated to transmit part of the beam and produce two parallel and displaced emerging beams. Can be coated to produce a polarizing beam separator. These rhombic prisms are manufactured from either BK7A or Fused Silica. They are supplied uncoated but many coating options are available.
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: | BK7 glass / UV Fused Silica |
|---|---|
| Surface Flatness: | < λ / 8 @ 633 nm |
| Surface Quality: | 60/40, 40/20, 20/10 |
| Dimension Tolerance: | < + 0.00 / – 0.20 mm |
| Angular Deviation | < 3 arc min~ 30arc sec. |
| Clear Aperture: | > 85% |
| Bevel: | 0.3 mm x 45° |
| Coating | As per customer’s request |
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