Blackened Optical Prism N-BK7 Fused Silica - Right Angle Penta Roof Prism
Specifications
Prism Type: Right Angle (45-45-90), Penta, Roof, Porro, Equilateral Triangle, Custom Polygonal
Leg / Aperture Size: 2.0 mm – 100 mm (custom ≥1.0 mm available)
Material: N-BK7 (std), H-K9L, UV Fused Silica, SF series, CaF₂ (IR on request)
Dimensional Tolerance: ±0.05 mm (std), ±0.02 mm (high precision)
Angle Tolerance: ±2 arcmin (±30 arcsec – ±5 arcmin available)
Surface Quality (Active Faces): 20-10 / 40-20 Scratch-Dig (MIL-PRF-13830B)
Surface Flatness (Active Faces): λ/4 @ 632.8 nm (λ/10 optional)
Blackening Treatment: Non-optical faces (inactive legs, rear face, outer periphery) painted with matte black optical paint; absorptance > 93–96% in 400–1100 nm
Coating – Reflecting Faces: Uncoated (TIR) / Protected Al or Ag / Dielectric HR (as specified)
Coating – Entrance & Exit: Uncoated / MgF₂ / BBAR 400–700 nm / 650–1050 nm
Clear Aperture: > 85% of entrance face
Beam Deviation: 90° (right-angle / penta) or per prism geometry
