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Non-sequential optimization technique for a computer controlled optical surfacing process using multiple tool

Dae Wook Kim1, Sug-Whan Kim, James H Burge

  • 1College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA. letter2dwk@hotmail.com

Optics Express
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

Computer controlled optical surfacing (CCOS) can be accelerated by globally optimizing dwell times and tool shapes across sequential polishing runs. This comprehensive non-sequential algorithm significantly improves figuring efficiency and reduces surface errors.

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Area of Science:

  • Optical Engineering
  • Manufacturing Technology

Background:

  • Computer Controlled Optical Surfacing (CCOS) utilizes numerically controlled (NC) machines and sub-diameter polishing tools.
  • Tool Influence Function (TIF) calibration is crucial for CCOS accuracy but can lead to long processing times.

Purpose of the Study:

  • To present a novel CCOS variation using globally optimized, non-sequential polishing runs.
  • To reduce overall polishing time while maintaining or improving surface accuracy.

Main Methods:

  • A comprehensive optimization algorithm was developed to simultaneously determine dwell times and tool shapes for a set of TIFs.
  • Sequential polishing runs were performed using this global optimization strategy.

Main Results:

  • Figuring efficiency improved from 88% to 98% for residual RMS surface error.
  • Residual RMS slope error improved from 47% to 89%.

Conclusions:

  • The comprehensive non-sequential optimization significantly enhances CCOS performance.
  • This method offers a substantial reduction in polishing time and improved accuracy for optical surface figuring.