Wedged Substrates
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BK7, Fused Silica and Excimer Grade Fused Silica
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Available in wedge angles 0.5, 1, 2 and 3 degrees
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Wedge angle used to reduce reflection from rear surface
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| Wedge Angle (°) | Diameter, D (mm) | Thickness, t (mm) | Material | Surface Flatness | Surface Quality | Diameter tolerance | Thickness tolerance | Wedge Angle tolerance | Clear Aperture | Bevel |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 30.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 0.5 | 50.0 | 8.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 10.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 15.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 20.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 25.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 30.0 | 5.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 50.0 | 8.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 60.0 | 10.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |
| 1.0 | 80.0 | 12.0 | BK7 | λ/20 | 10 - 5 | +0, -0.1mm | ±0.1mm | ±5arcmin | >90% | 0.2mm x 45° typical |