Plano Convex Lens – UV Grade MgF2 (PCX)
UV grade MgF2 for UV transmitting applications
- (especially, 193nm, 248nm)
- Plano-convex is close to best form for a focusing lens
- Focal length designed at 250nm
- Focal Length: f = R/(n-1)
- n: refractive index
- R: radius curvature
Plano-convex lenses are useful for a wide range of applications. These lenses are manufactured from
UV transmitting MgF2 (specifically designed for Excimer 193~248nm) applications. Lenses are uncoated but Anti-reflection coatings are available. When used to focus a collimated beam, the light should be incident on the curved surface of the lens. These plano-convex lenses may be combined with other lenses to form complex imaging systems.
Material: |
UV Grade MgF2 |
Surface Flatness: |
< λ / 4 @ 633 nm |
Surface Quality: |
<20/10 (both sides) |
Centration Error: |
< 3 arc min |
Focal Length Tolerance (@250nm) |
< Typical ± 0.5% |
Diameter Tolerance: |
< + 0.00 / – 0.20 mm |
Thickness Tolerance: |
< ± 0.25 mm |
Clear Aperture: |
>85% of diameter |
FL to ROC Conversion Table:
FL @ 250nm (mm) |
FL @ 193nm (mm) |
Radius of Curvature (mm) |
50 |
47.91 |
20.49 |
75 |
71.86 |
30.73 |
100 |
95.81 |
40.98 |
150 |
143.72 |
61.46 |
200 |
191.62 |
81.95 |
250 |
239.53 |
102.44 |
500 |
497.06 |
204.88 |
750 |
718.59 |
307.32 |
1000 |
958.12 |
409.76 |