Specifications:
| Material | BK7, fused silica, optical glass, Ge, ZnSe, Silicon | Surface Quality | 10/5 S/D to 40/20 S/D (uncoated) |
| Clear Aperture | >90% | Diameter Range | 5-280mm |
| Diameter Tolerance | +0.0/-0.05mm | Protective Chamfers | 0.3mm max@45° |
| Center Thickness Tolerance | ≤0.05mm | EFL Tolerance | ≤0.1% |
| Asphere Figure Error P-V | ±1 µm | Surface Form Deviation RMS | ≤0.5 µm |
While the spherical aberrations of traditional spherical lenses, the aspherical lens with non-spherical surface are designed to reduce it in lasers and imaging. Aspheric lenses can increase the numerical aperture of a lens while minimizing system aberrations and reduce the number of elements needed in a multi-elements system, in somehow replacing a multi-lens system with a single aspheric lens.
The lenses are made from precision CNC grinding and polishing machine, diamond turning machine and glass molded processing , substrate materials: BK7, Fused silica and other optical glass materials, infrared materials Germanium, ZnSe and Silicon could be used. Hangzhou Shalom EO provide the custom aspherical lenses upon customer’s request.
