Aspherical Lenses

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Aspheres for superior image quality 

Aspherical lenses have a complex surface profile. SCHOTT uses both Computerized Numerical Control (CNC machining) and Magneto Rheological Finishing (MRF tooling) techniques to manufacture these lenses in small- and medium-sized quantities for use in prototypes.

Due to their unique surface structure, aspherical lenses eliminate monochromatic aberrations (e.g. spherical aberrations) and therefore deliver superior overall image quality. Often, they are used to replace multi-spherical element assemblies because they reduce the total weight and enable a more compact design.

SCHOTT offers aspheres in various sizes and different materials and relies on two main polishing processes:
CNC machining and polishing of aspherical lenses

CNC machining and polishing of aspherical lenses

Precise pressing for aspherical lenses

Precise pressing for aspherical lenses

These two basic polishing processes serve different products and markets:
 
CNC machining and polishing
Precise pressing
Quantity Prototypes, small to medium-sized quantities Broadscale production
Market Laser and industrial applications Imaging and lighting applications
Advantages High flexibility with design changes High volumes
Glass type All glass types, fused silica Low Tg glass

Polishing processes for aspherical lenses

Applications:

  • Digital projection, camera, binocular
  • High power laser lenses
  • Endoscopy
  • Microscopy
  • Astronomy & Space
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