Medium Extinction Broadband Polarizing Cube Beamsplitters (BPBM)
- Broadband visible use only (440nm - 680nm)
- Low power applications, cemented cubes
- Medium extinction ratio
These polarizing cube beamsplitters provide a high degree of polarization
over a broad visible spectral range. They are made by cementing the prisms
together making them unsuitable for high power use. They use BK7 prisms and
provide a medium extinction ratio of 100: 1.
| Material: | BK7A |
| Surface Flatness: | < λ / 8 @ 633 nm |
| Surface Quality: | <20/10 |
| Beam Deviation: | < 3 arc min |
| Dimension Tolerance: | < + 0.00 / - 0.20 mm |
| Extinction Ratio: | > 100: 1 |
| AR Coating: | < 0.5% per face |
| Transmission of p-polarization: | T average > 90% |
| Reflectance of s-polarization: | R average > 99.8% |
| Absorption: | Negligible |
| Damage Thresholds: | > 0.5 J/cm2 (10 ns) |
| Clear Aperture: | > 85% of central circular dimension |
| Temperature Range: | - 50° C to 80° C |
