Rapid convergence on high-frequency errors in computer-controlled optical fabrication

Aaron N. Turner

doi:10.1117/12.295129

1 November 1997 Rapid convergence on high-frequency errors in computer-controlled optical fabrication

Aaron N. Turner

Proceedings Volume 3134, Optical Manufacturing and Testing II; (1997) https://doi.org/10.1117/12.295129
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Conventional approaches to the correction of mid and high frequency errors in the fabrication of aspheric optical surfaces employ 'bridging effects' of large semi-flexible tools. However, these effects are difficult to quantitatively predict, and their use often results in the loss of low-frequency figure. An alternative approach uses established computer-controlled variable dwell techniques with small figuring tools to remove these errors in a highly convergent and predictable process. Technical requirements on the measurement, data analysis, and machine tolerances surrounding the use of tools less than 30mm in diameter are discussed. The correction of features as narrow as 12mm demonstrated.

Citation Download Citation

Aaron N. Turner "Rapid convergence on high-frequency errors in computer-controlled optical fabrication", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); https://doi.org/10.1117/12.295129

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