Plano-Convex Lenses
UV Fused Silica · H-K9L (N-BK7 equiv.) · CaF₂ on request
Plano-convex lenses focus or collimate light with a single convex surface and a flat surface. UV fused silica versions are the standard choice for UV and near-IR laser applications, offering low absorption and high laser damage threshold. H-K9L glass provides a cost-effective option for visible-wavelength systems.
Processing Specifications
| Parameter | Standard | Precision |
|---|---|---|
| Diameter Range | Ø5–Ø200mm | Ø5–Ø150mm |
| Diameter Tolerance | ±0.1mm | ±0.05mm |
| Thickness Tolerance | ±0.2mm | ±0.1mm |
| Focal Length Tolerance | ±1% | ±0.5% |
| Surface Quality (S/D) | 40-20 | 20-10 |
| Surface Flatness (flat side) | λ/4 | λ/10 |
| Centration Error | < 3' | < 1' |
| Clear Aperture | > 85% | > 90% |
| Bevel | 0.3×45° | 0.1×45° |
Coating Options
- V-Coat AR — Single wavelength (355, 532, 1064nm or custom): R < 0.25% per surface
- Broadband AR — Optimized over specified range (e.g., 400–700nm, 700–1100nm): R < 1.0% avg
- Uncoated — Available for all materials; note ~3.5% Fresnel reflection per surface on fused silica
- Custom spectral requirements on request — specify wavelength, AOI, and polarization state
Typical Applications
Laser Beam FocusingBeam CollimationFiber CouplingBeam Expansion TelescopesSpectroscopyResearch & Instrumentation