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Aspheric Lenses

  • Substrate materials: BK7, fused silica, optical glass, Ge, ZnSe, Si
  • Made by CNC, SPDT and molded processing
  • Diameter range: 5mm to 300mm
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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
Note: Other special specifications are available upon request.

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.