Micro Wedge Prism (Micro Wedged Window) — N-BK7 / UV Fused Silica, Ø0.5–5.0 mm
Specifications
Element Type: Optical Wedge / Wedged Window (Micro Circular)
Substrate Materials: N-BK7 (nd=1.5168 @ 587.6 nm) / UV Fused Silica (nd=1.4585 @ 588 nm) / CaF₂ / ZnSe available
Diameter: 0.5 mm / 1.0 mm / 2.0 mm / 3.0 mm / 5.0 mm (custom Ø0.3–10 mm+ on request)
Diameter Tolerance: +0.000 / –0.020 mm (micro sizes); +0.00 / –0.10 mm (standard)
Thickness at Center: 0.30–1.00 mm (adjustable per wedge angle & diameter)
Thickness Tolerance: ±0.02 mm (micro); ±0.10 mm (standard)
Wedge Angle: 0.5° / 1° / 2° / 3° / 5° standard (0.25°–10° available)
Wedge Angle Tolerance: ±3 arcmin (±1 arcmin on request)
Surface Flatness: λ/4 @ 632.8 nm (λ/10 optional over central clear aperture)
Surface Quality: 20-10 or 40-20 Scratch-Dig (per MIL-PRF-13830B)
Clear Aperture: > 85% of diameter
Parallelism (between faces): Not applicable (intentional wedge angle)
Coating Options: Uncoated / BBAR (250–400 nm UV, 400–700 nm VIS, 650–1050 nm NIR, 1000–1600 nm SWIR) / Partial reflective (R=10–50%)
Wavelength Range: 185–2100 nm (UVFS); 350–2100 nm (BK7); extended IR on CaF₂/ZnSe
Beam Deviation (δ ≈ (n−1)×α): e.g., ~0.26° @ 633 nm for 0.5° wedge on BK7; ~0.48° for 1° wedge on UVFS
Bevel / Chamfer: Protective chamfer 0.03–0.08 mm × 45° (micro); 0.05–0.15 mm (standard)
