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Proceedings Paper

Resolution, measurement errors and uncertainties on deflectometric acquisition of large optical surfaces "DaOS"
Author(s): E. Hofbauer; R. Rascher; F. Friedke; R. Kometer
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Paper Abstract

The basic physical measurement principle in DaOS is the vignettation of a quasi-parallel light beam emitted by an expanded light source in auto collimation arrangement. The beam is reflected by the surface under test, using invariant deflection by a moving and scanning pentaprism. Thereby nearly any curvature of the specimen is measurable. Resolution, systematic errors and random errors will be shown and explicitly discussed for the profile determination error. Measurements for a “plano-double-sombrero” device will be analyzed and reconstructed to find out the limit of resolution and errors of the reconstruction model and algorithms. These measurements are compared critically to reference results that are recorded by interferometry and Deflectometric Flatness Reference (DFR) method using a scanning penta device.

Paper Details

Date Published: 15 June 2017
PDF: 12 pages
Proc. SPIE 10326, Fourth European Seminar on Precision Optics Manufacturing, 1032603 (15 June 2017); doi: 10.1117/12.2267513
Show Author Affiliations
E. Hofbauer, Technische Hochschule Deggendorf (Germany)
R. Rascher, Technische Hochschule Deggendorf (Germany)
F. Friedke, Technische Hochschule Deggendorf (Germany)
R. Kometer, Hofbauer Optik Mess- und Prüftechnik (Germany)

Published in SPIE Proceedings Vol. 10326:
Fourth European Seminar on Precision Optics Manufacturing
Oliver W. Fähnle; Rolf Rascher; Christine Wünsche, Editor(s)

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