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

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

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3134..231t&link_type=abstract

Proc. SPIE Vol. 3134, p. 231-239, Optical Manufacturing and Testing II, H. Philip Stahl; Ed.

Computer Science

Scientific paper

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.

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