Aspheric lenses are designed to be diffraction limited. They usually achieve a smaller spot size than both the plano-convex and positive meniscus lens. This provides the highest power density at the lens workpiece with equivalent focal length.
| Specifications |
| Material | ZnSe Laser Grade C.V.D. type |
| Diameter Tolerances | +.000", -.005" |
| Thickness Tolerances | ±.010" |
| Surface Figure | < 1/40 wavelength @ 10.6μ |
| ETV | < .0005" |
| Focal Length Tolerance | ±1.0% |
| Surface Quality | < 40/20 scratch-dig Laser Finish |
| Spectral Performance |
| Standard AR Coating type Both Sides @ 10.6μm (AR) |
| Absorption | < 0.20 % total |
| Reflectance | < 0.20% per surface @ 10.6μm |
| Transmittance | > 99.4% typical |
| P/N | Substrate | Diameter(inches) | Diameter(mm) | Focal Length |
| LZ-1115-AS | ZnSe | 1.1" | 27.94 | 1.5" |
| LZ-1120-AS | ZnSe | 1.1" | 27.94 | 2.0" |
| LZ-1125-AS | ZnSe | 1.1" | 27.94 | 2.5" |
| LZ-1515-AS | ZnSe | 1.5" | 38.1 | 1.5" |
| LZ-1525-AS | ZnSe | 1.5" | 38.1 | 2.5" |
| LZ-1535-AS | ZnSe | 1.5" | 38.1 | 3.5" |
| LZ-1540-AS | ZnSe | 1.5" | 38.1 | 4.0" |
| LZ-1550-AS | ZnSe | 1.5" | 38.1 | 5.0" |
| LZ-2050-AS | ZnSe | 2.0" | 50.8 | 5.0" |
★The above are about standard products,they can also be custom made
