High-Precision Silicon Wedge Prism for NIR/MWIR Beam Steering – Custom Sizes & BBAR Coatings Available
Specifications
Element Type: Optical Wedge / Wedged Window (Circular)
Substrate Material: Monocrystalline Silicon - CZ (10-40 Ohm-cm) std; FZ (>1000 Ohm-cm) or HRFZ available
Refractive Index: n approx. 3.4223 @ 5 um; n approx. 3.4178 @ 10 um (Si not transmissive @10.6 um)
Typical Diameter: 10 / 12.7 / 25.4 mm (custom Dia. 5-100 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 deg (30 arcmin) / 1 deg / 2 deg / 3 deg / 5 deg std (0.25 deg - 10 deg on request)
Wedge Angle Tolerance: +/- 10 arcmin (+/- 3 arcmin to +/- 15 arcmin tighter avail)
Surface Flatness: Lambda/4 @ 632.8 nm (Lambda/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 um (CZ/FZ, uncoated); up to 12 um (thin FZ/HRFZ)
Coating Options: Uncoated / BBAR both sides 1.5-6 um / 3-5 um (Ravg < 1%) / DLCC protective coat
