The CAFBS10 IR Beamspliter is a 38.1 mm diameter, 3.00 mm thick Calcium Fluoride beamsplitter with 50/50 reflection/transmission ratio optimized for45° angle of incidence. This beamsplitter is designed for broadband infrared applications covering spectral range from 2 µm to 8 µm. The back surface of the beamsplitter has a 3 arc minutes wedge to reduce undesired interference effects caused by the back reflections from both surfaces of the optics.
| Model | CAFBS11 |
|---|---|
| Shape | Round |
| Type | IR Beamsplitters |
| Material | Calcium Fluoride |
| Diameter | 1.5 in. (38.1 mm) |
| Thickness | 0.12 in. (3.0 mm) |
| Surface Quality | 60-40 scratch-dig |
| Surface Accuracy | ≤2 λ at 632.8 nm over the clear aperture |
| Angle of Incidence | 45 ° |
| Antireflection Coating | Uncoated |
| Diameter Tolerance | +0.00/-0.13 mm |
| Thickness Tolerance | ± 0.13 mm |
| Transmission | 50%, independent of polarization |
| Wavefront Distortion | 2-8 µm |
| Parallelism | 3 arc minutes |
| Clear Aperture | > central 85% of diameter |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended see Care and Cleaning of Optics |
