Aspheric optics: Smoothing the ripples with semi-flexible tools

Michael T. Tuell, James H. Burge, Bill Anderson

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


A well-known fabrication problem with aspheric optical surfaces lies in high-frequency surface irregularities inherent in the figuring process. Optical grinding and polishing tools can smooth these ripples, yet retain the flexibility required to fit the aspheric surface. An f/0.52, paraboloidal, 17-in. convex surface is produced with conventional rigid tools. A transmission ronchigram is obtained showing high-spatial-frequency errors of large magnitude. After four hours of grinding with a semi-flexible multiple-segment ring tool, almost all high-frequency error is removed. This shows good potential for smoothing finished aspheric optics. Flexible tools can also be involved in the figuring process itself.

Original languageEnglish (US)
Pages (from-to)1473-1474
Number of pages2
JournalOptical Engineering
Issue number7
StatePublished - Jul 2002


  • Aspherics
  • Optical fabrication
  • Spatial frequencies
  • Strain analysis
  • Surfaces

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)


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