Plano Convex Spherical Lenses - IR Grade CaF2 (PCX)
- Ideal for wavelengths 2-5 μm
- Focal length designed at 2.94 μm
Focal Length: f = R/(n-1)
n: refractive index
R: radius curvature
These plano-convex lenses are made from infra-red grade Calcium Fluoride and are excellent for use with lasers emitting in the 2-5 micron range. The focal length is designed at 2.94 microns. They are supplied uncoated but anti-reflection coatings are available on request.
| Material: | IR Grade CaF2 |
| Surface Flatness: | < λ / 4 @ 633 nm |
| Surface Quality: | <20/10 (both sides) |
| Centration Error: | < 3 arc min |
| Focal Length Tolerance @ 2.94um | < Typical ± 0.5% |
| Diameter Tolerance: | < + 0.00 / - 0.20 mm |
| Thickness Tolerance: | < ± 0.25 mm |
| Clear Aperture: | > 85% of diameter |
