Wedge Prisms
UV Fused Silica · H-K9L (N-BK7 equiv.)
Wedge prisms introduce a small angular deviation to a transmitted beam. Two identical wedge prisms rotated relative to each other (Risley pair configuration) provide continuously variable beam steering over a circular field. Widely used in laser aiming systems, interferometry, and beam-pointing correction.
Specifications
| Parameter | Value |
|---|---|
| Wedge Angle Range | 0.5°–15° (custom) |
| Diameter | Ø10–Ø100mm |
| Diameter Tolerance | ±0.1mm |
| Wedge Angle Tolerance | ± 1' |
| Surface Quality (S/D) | 40-20 |
| Surface Flatness | λ/4 per face |
| Clear Aperture | > 85% |
| Bevel | 0.3×45° |
Coating Options
- AR both faces — Single wavelength: R < 0.25%; broadband: R < 1.0% avg
- Uncoated — Available; ~3.5% Fresnel loss per surface on fused silica
- Custom AR for specific laser lines (193, 266, 355, 532, 1064nm and others on request)
Typical Applications
Beam Steering (Risley Pair)Laser Aiming SystemsInterferometry Beam SamplingAngular Deviation / Beam OffsetChromatic Dispersion StudiesWavefront Tilt Correction