Calibration and optimization of computer-controlled optical surfacing for large optics

Dae Wook Kim, Hubert M. Martin, James H. Burge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Scopus citations

Abstract

Precision optical surfaces can be efficiently manufactured using a computer-controlled optical surfacing (CCOS) process. Most CCOS processes are based on control of the dwell time of a tool on the workpiece, according to the desired removal and the tool influence function (TIF), which is the material wear function of the tool. Several major topics were investigated to improve current CCOS processes and provide new solutions for the next generation of CCOS processes. A rigid conformal (RC) lap using a visco-elastic non-Newtonian medium was invented. It conforms to the aspheric surface shape, yet maintains stiffness on short time scales to provide natural smoothing. The smoothing removes mid- to high-frequency errors while controlled dwell time removes low-frequency errors. A parametric smoothing model was also introduced to predict the smoothing effects. A parametric edge TIF model to represent measured edge TIFs was developed and demonstrated. This model covers the removal behavior as the tool overhangs the edge of the workpiece. These new tools and models were applied in a new process optimization technique called nonsequential optimization. The non-sequential approach performs a comprehensive optimization of dwell time using multiple TIFs (multiple tools) simultaneously. An overview of these newly implemented CCOS features** is presented along with some actual CCOS results.

Original languageEnglish (US)
Title of host publicationOptical Manufacturing and Testing IX
DOIs
StatePublished - Nov 28 2011
EventOptical Manufacturing and Testing IX - San Diego, CA, United States
Duration: Aug 22 2011Aug 24 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8126
ISSN (Print)0277-786X

Other

OtherOptical Manufacturing and Testing IX
CountryUnited States
CitySan Diego, CA
Period8/22/118/24/11

Keywords

  • Computer-controlled optical surfacing
  • Edge TIF
  • Non-sequential Optimization
  • Rigid conformal lap
  • Smoothing model

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Kim, D. W., Martin, H. M., & Burge, J. H. (2011). Calibration and optimization of computer-controlled optical surfacing for large optics. In Optical Manufacturing and Testing IX [812615] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8126). https://doi.org/10.1117/12.893878