Free-form processing of micro-optics on curved surfaces

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By using the developed technology of free-form processing of micro-optics on curved surfaces, ultra-precision processing to extend the limits of various lithographic procedures for structuring three-dimensional micro-optics is possible.

 

Production of

  • 3D micro-optical structures in optical quality
  • Geometries which are difficult or impossible to structure with lithographic techniques such as photo-, gray tone or laser lithography
  • Free-form geometries

 

Technology

  • Cutting processes with small diamond tools

 

Procedure

  • Production of a lens array as form insert of an injection molding tool whose molded plastic lens array serves as a 3D micro-optical imaging element to transfer a flat mask on to a curved substrate surface using a lithography process
  • Subsequent replication with injection molding