Beam Samplers
- Provides a 5% reflected sample of the entire beam
- Highly efficient Anti-Reflection coating on the second surface to eliminate ghosts
- Available in four standard diameters
- Wedged second surface also available for highly demanding applications
- Surfaces finished to λ/10 flatness
- Standard diameters from 25.4 to 50.8mm
About 5% of a beam incident at 45 degrees is reflected from one surface of these BK7 beam samplers. The faces are parallel to within 5arcsec with a highly effective Anti-Reflection coating on the second surface. This coating eliminates virtually all ghost image problems. The 5% reflected beam is useful for diagnostic sampling or monitoring of the optical beam.
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| Diameter (mm) | Thickness (mm) | Material | Surface Flatness | Surface Quality | Parallelism | Diameter tolerance | Thickness tolerance | Clear Aperture | Reflectance | Bevel |
|---|---|---|---|---|---|---|---|---|---|---|
| 25.4 | 3.0 | BK7 | λ/10 | 20 - 10 | 5 arcsec | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 25.4 | 3.0 | BK7 | λ/10 | 20 - 10 | 1 degree wedge | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 30.0 | 3.0 | BK7 | λ/10 | 20 - 10 | 5 arcsec | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 30.0 | 3.0 | BK7 | λ/10 | 20 - 10 | 1 degree wedge | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 50.0 | 5.0 | BK7 | λ/10 | 20 - 10 | 5 arcsec | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 50.0 | 5.0 | BK7 | λ/10 | 20 - 10 | 1 degree wedge | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 50.8 | 5.0 | BK7 | λ/10 | 20 - 10 | 5 arcsec | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |
| 50.8 | 5.0 | BK7 | λ/10 | 20 - 10 | 1 degree wedge | +0, -0.2mm | ±0.2mm | >90% | Rav=5% at 45 degrees | 0.2mm x 45° typical |