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Optical Engineering

Quantitative evaluation of optical surfaces by means of an improved Foucault test approach
Author(s): Donald E. Vandenberg; William D. Humbel; Alan Wertheimer
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Paper 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.

Paper Details

Date Published: 1 August 1993
PDF: 4 pages
Opt. Eng. 32(8) doi: 10.1117/12.145355
Published in: Optical Engineering Volume 32, Issue 8
Show Author Affiliations
Donald E. Vandenberg, Eastman Kodak Co. (United States)
William D. Humbel, Eastman Kodak Co. (United States)
Alan Wertheimer, Eastman Kodak Co. (United States)

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