Quantitative evaluation of optical surfaces using an improved Foucault test approach

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

doi:10.1117/12.48836

1 December 1991 Quantitative evaluation of optical surfaces using an improved Foucault test approach

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

Proceedings Volume 1542, Active and Adaptive Optical Systems; (1991) https://doi.org/10.1117/12.48836
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Foucault knife edge testing has been the classic qualitative test method for optical surface and wavefront quality measurement for over one hundred years. We have developed an innovative method, using off the shelf CIigit.a1 microprocessors and a solid state camera, whereby quantitative evaluation of surfaces has been achieved. This paper will describe a method that upgrades the knife edge test from a qualitative test to a precise quantitative evaluation. The hardware is described and results 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 using an improved Foucault test approach", Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); https://doi.org/10.1117/12.48836

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