Quantitative evaluation of optical surfaces by means of an improved Foucault test approach

Donald E. Vandenberg; William D. Humbel; Alan Wertheimer

doi:10.1117/12.145355

1 August 1993 Quantitative evaluation of optical surfaces by means of an improved Foucault test approach

Donald E. Vandenberg, William D. Humbel, Alan Wertheimer

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Optical Engineering, Vol. 32, Issue 8, (August 1993). https://doi.org/10.1117/12.145355

Abstract

Foucault knife-edge testing has been the classic qualitative test method for optical surface and wave-front quality measurement for more than one hundred years. We have developed an upgraded quantitative method, using off-the-shelf digital microprocessors and a solid state camera, to provide white-light evaluation of generalized optical surfaces with the precision and accuracy of computer-aided laser interlerometry. We describe a method that upgrades the knife-edge test from a qualitative test to a precise quantitative evaluation. The hardware is described and initial results for some aberrations are shown comparing the knife-edge test with interferometric measurements.

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Donald E. Vandenberg, William D. Humbel, and Alan Wertheimer "Quantitative evaluation of optical surfaces by means of an improved Foucault test approach," Optical Engineering 32(8), (1 August 1993). https://doi.org/10.1117/12.145355

Published: 1 August 1993

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