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Proceedings Paper

Mirror shape detection by reflection grating moiré method with optical design validation
Author(s): D. Fontani; F. Francini; D. Jafrancesco; L. Mercatelli; P. Sansoni
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Paper Abstract

Shape detection on objects of large and huge dimensions has always represented a challenging task, mostly by the practical point of view due to the size of the related measurement equipment. When the tested object is a mirror the measurements is additionally complicated, since the classical techniques of structured light cannot be directly applied. The method proposed in this paper has been applied to measure the curvature of a deformable mirror of 1-meter diameter for a heliostat plant. The mirror shape is obtained studying the spatial variations of a grating projected on the sample and reflected by it on a screen. The measurement set-up employs a PC projector and a digital camera. The results of this curvature assessment are compared to those derived from a simulation obtained by an optical design programme.

Paper Details

Date Published: 13 June 2005
PDF: 8 pages
Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); doi: 10.1117/12.612114
Show Author Affiliations
D. Fontani, Istituto Nazionale di Ottica Applicata (Italy)
F. Francini, Istituto Nazionale di Ottica Applicata (Italy)
D. Jafrancesco, Istituto Nazionale di Ottica Applicata (Italy)
L. Mercatelli, Istituto Nazionale di Ottica Applicata (Italy)
P. Sansoni, Istituto Nazionale di Ottica Applicata (Italy)


Published in SPIE Proceedings Vol. 5856:
Optical Measurement Systems for Industrial Inspection IV
Wolfgang Osten; Christophe Gorecki; Erik L. Novak, Editor(s)

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