Single crystal sapphire lenses are ideal for demanding applications (such as laser systems) and harsh environments because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamond and, because of their structural strength, sapphire crystal lenses can be made much thinner than other common materials. Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.15 to 5.5μm.
Hangzhou Shalom EO offers the custom lenses upon customer’s request, and the lenses with anti-reflection and other thin film coatings are available.
SPECIFICATIONS
| Specifications | |
| Lens Type | Plano-convex, Plano-concave, Double convex, Meniscus lenses |
| Materials | Optical grade single crystal sapphire |
| Aperture | >90% |
| Diameter tolerance | +0.0/-0.2mm |
| Thickness tolerance | +/-0.2mm |
| Centering error | 3 arc minutes |
| Surface Quality | Option: 60/40, 40/20 or 20/10 S/D |
| Parallelism | 1 arc minute |
| Coating | According to customer’s requirement |
Features
- Large wavelength range: 0.15~5μm
- Extreme hardness for harsh environment
- Chemical and erosion resistant front surface
- Large strength for thin lenses