caf2 lens exhibits good transmission from 150nm to 7.0 microns in the IR and is often used in cryo cooled thermal imagers.
It exhibits low absorption and has high damage thresholds making it suitable for excimer laser optics.
Due to its wide transmission caf2 lens may be used in spectroscopic windows and lens systems.
Having a low refractive index means that anti-reflection coatings are rarely necessary.
Specifications of caf2 lens:
| Material: | Optical Grade caf2 |
| Diameter Tolerance: | +0.0, -0.15mm |
| Design Wavelength: | 1.5um |
| Clear Aperture: | >80% |
| Centration: | 1 arc minute |
| Surface Quality: | 80/50 |
| Paraxial Focal Length : | +2% |
| Bevel: | 0.25mm X 45° |
| Surface Quality : | 80-50 scratch and dig |
| Part No. | F (mm) | F(mm) | R1(mm) | Tc (mm) | Te(mm) | fb(mm) |
| WIN3-201 | 50.0 | 25.4 | 21.25 | 6.2 | 2.0 | 45.6 |
| WIN3-202 | 100.0 | 25.4 | 42.50 | 3.9 | 2.0 | 45.6 |
| WIN3-203 | 150.0 | 25.4 | 63.75 | 3.3 | 2.0 | 147.7 |
| WIN3-204 | 200.0 | 25.4 | 85.00 | 3.0 | 2.0 | 197.9 |
| WIN3-205 | 300.0 | 25.4 | 127.50 | 2.6 | 2.0 | 298.2 |
| WIN3-206 | 500.0 | 25.4 | 212.50 | 2.4 | 2.0 | 498.3 |
| WIN3-207 | 1000.0 | 25.4 | 425.00 | 2.2 | 2.0 | 998.5 |
| WIN3-401 | 100.0 | 50.0 | 42.50 | 11.1 | 3.0 | 92.2 |
| WIN3-402 | 150.0 | 50.0 | 63.75 | 9.1 | 3.0 | 144.3 |
| WIN3-403 | 200.0 | 50.0 | 85.00 | 6.8 | 3.0 | 195.2 |
| WIN3-404 | 500.0 | 50.0 | 212.50 | 4.5 | 3.0 | 496.8 |
| Part No. | F (mm) | F(mm) | R1(mm) | Tc (mm) | Te(mm) | fb(mm) |
| PCV3-202 | -100.0 | 25.4 | 42.50 | 2.0 | 3.9 | -101.4 |
| PCV3-204 | -200.0 | 25.4 | 85.00 | 2.0 | 3.0 | -201.4 |
| PCV3-206 | -500.0 | 25.4 | 212.50 | 2.0 | 2.4 | -501.4 |
| PCV3-207 | -1000.0 | 25.4 | 425.00 | 2.0 | 2.2 | -1001.4 |
