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 | < λ/10 @.633µm |
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 | Diameter(mm) | Focal Length |
ZNSE-1115-ASPH | ZnSe | 1.1” | 27.94 | 1.5” |
ZNSE-1120-ASPH | ZnSe | 1.1” | 27.94 | 2.0" |
ZNSE-1125-ASPH | ZnSe | 1.1” | 27.94 | 2.5” |
ZNSE-1515-ASPH | ZnSe | 1.5” | 38.1 | 1.5” |
ZNSE-1525-ASPH | ZnSe | 1.5” | 38.1 | 2.5” |
ZNSE-1535-ASPH | ZnSe | 1.5” | 38.1 | 3.5" |
ZNSE-1540-ASPH | ZnSe | 1.5” | 38.1 | 4.0" |
ZNSE-1550-ASPH | ZnSe | 1.5” | 38.1 | 5.0” |
ZNSE-2050-ASPH | ZnSe | 2.0" | 50.8 | 5.0” |
*The above are about standard products,they can also be custom made |