Rochon polarizer
The Rochon polarizer is an early design comprising two joined birefringent prisms. Ordinary and extraordinary beams initially travel together along the first prism's optical axis with the ordinary refractive index. In the second prism, the ordinary beam retains the same index and continues undeviated, while the extraordinary beam sees a lower index and refracts at the interface. Refraction increases further at the birefringent-material/exit surface. Separation angles can be designed for particular wavelengths. Standard separation-angle versus wavelength relationships are shown in the accompanying figure.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | MgF₂, α-BBO, calcite, YVO₄ or quartz |
| Wavelength Range [MgF₂] | 130–4000 nm |
| Wavelength Range [α-BBO] | 190–3500 nm |
| Wavelength Range [Calcite] | 350–2300 nm |
| Wavelength Range [YVO₄] | 400–5000 nm |
| Wavelength Range [Quartz] | 200–2300 nm |
| Extinction ratio [MgF₂] | ＜5×10⁻⁶ |
| Extinction ratio [α-BBO] | ＜5×10⁻⁶ |
| Extinction ratio [Calcite] | ＜5×10⁻⁵ |
| Extinction ratio [YVO₄] | ＜5×10⁻⁶ |
| Extinction ratio [Quartz] | ＜5×10⁻⁵ |
| Surface Quality | 20/10 |
| Beam deflection angle | <1′ |
| Wavefront distortion λ [@633 nm] | λ/4 @ 633 nm |
| Damage Threshold | ＞500 MW/cm² |
| Coating | Single-layer magnesium fluoride (MgF₂) |
| Mount | Black anodized aluminum |
Key Features
Datasheet
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Supplier Information
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