Silicon Wedge Prism - Monocrystalline CZ/FZ Si - 0.5°-5° Wedge Angle

• Element Type: Optical Wedge / Wedged Window (Circular)
• Substrate Material: Monocrystalline Silicon — CZ (10–40 Ω·cm) std.; FZ (>1000 Ω·cm) or HRFZ available
• Refractive Index: n ≈ 3.4223 @ 5 µm; n ≈ 3.4178 @ 10 µm (Si not transmissive @10.6 µm)
• Typical Diameter: 10 / 12.7 / 25.4 mm (custom Ø5–100 mm+)
• Diameter Tolerance: +0.00 / –0.20 mm
• Typical Thickness (thick side): 2.0 / 3.0 / 5.0 mm (custom)
• Thickness Tolerance: ±0.10 mm
• Wedge Angle: 0.5°(30′) / 1° / 2° / 3° / 5° std (0.25°–10° on request)
• Wedge Angle Tolerance: ±10 arcmin (±3′–±15′ tighter avail.)
• Surface Flatness: λ/4 @ 632.8 nm (λ/10 over CA optional)
• Surface Quality: 40-20 or 20-10 Scratch-Dig (MIL-PRF-13830B)
• Clear Aperture: > 90% of diameter
• Transmission Range: 1.2–7 µm (CZ/FZ, uncoated); up to 12 µm (thin FZ/HRFZ)
• Coating Options: Uncoated / BBAR both sides 1.5–6 µm / 3–5 µm (Ravg <1%) / DLCC protective coat
• Beam Deviation: δ ≈ (n–1)×α (e.g., ~1.42° @5 µm for 0.5° wedge on Si)
• Chamfer: Protective bevel 0.2–0.5 mm × 45°
• Density: 2.33 g/cm³ | Thermal Conductivity: 163 W/m·K @300K
• Compliance: RoHS / REACH / ISO 9001
• Applications: NIR/MWIR beam deviation, FTIR etalon suppression, IR laser cavity wedge, beam sampling, thermal imager alignment
• ⚠ Not for CO₂ laser @10.6 µm (strong Si absorption); use ZnSe or Ge
• Custom Options: Custom Ø, wedge angle, FZ/HRFZ substrate, AR coating spec, rectangular shape, Brewster version