BK7 Window are of high precision dimension control, minimal transmitted beam deviation, high surface quality. With those excellent features, the BK7 window is widely use in projection optics systems, imaging and optical measurement system.
| SPECIFICATION | |
| Material | BK7 grade A optical glass |
| Diameter Tolerance | +0.00/-0.05 mm |
| Thickness Tolerance | ±0.1mm |
| Clear Aperture | >85% |
| Parallelism | Refer to the table |
| Surface Quality | 10-5 scratch and dig |
| Flatness | λ/10 per 25 mm@632.8 nm |
| Wavefront Distortion | λ/10 per 25 mm@632.8 nm |
| Protective Bevel | 0.25 mm x 45° |
| Standard Product | |||
| 1 min Parallelism | 10 sec Parallelism | φ (mm) | T (mm) |
| Part No. | Part No. | ||
| SBW101 | SBW201 | 10.0 | 6.0 |
| SBW102 | SBW202 | 12.7 | 6.0 |
| SBW103 | SBW203 | 25.0 | 6.0 |
| SBW104 | SBW204 | 30.0 | 6.0 |
| SPECIFICATION | |
| Material | BK7 grade A optical glass or Chineses H-K9L |
| Diameter Tolerance | +0.00/-0.10 mm |
| Thickness Tolerance | ±0.2 mm |
| Clear Aperture | >85% |
| Parallelism | <1 arc minute |
| Surface Quality | 60-40 scratch and dig |
| Flatness | λ/4 per 25 mm@632.8 nm |
| Wavefront Distortion | λ/4 per 25 mm@632.8 nm |
| Protective Bevel | 0.25 mm x 45° |
| Standard BK7 Window Standard Product | ||
| Part No. | Outer Diameter φ ±0.1 (mm) | Thickness T ±0.2 (mm) |
| SBW301 | 10.0 | 3.0 |
| SBW302 | 15.0 | 3.0 |
| SBW303 | 25.0 | 3.0 |
| SBW304 | 50.0 | 3.0 |
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