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Proceedings Paper

Design of an E-ELT M1 segment measurement machine with nanometer accuracy
Author(s): A. Bos; R. Henselmans; P. C. J. N. Rosielle; M. Steinbuch; M. J. A. te Voert
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Paper Abstract

The baseline design of the European Extremely Large Telescope features a telescope with a 39-meter-class primary mirror (M1), consisting of 798 hexagonal segments. A measurement machine design is presented based on a non-contact single-point scanning technique, capable of measuring the form error of each segment with nanometer uncertainty, fast, and with low operational costs. The implementation of a tactile precision probe eliminates the need for the CMM in the earlier segment manufacturing process. Preliminary assessment show nanometer-level uncertainty after calibration.

Paper Details

Date Published: 18 July 2014
PDF: 12 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91510X (18 July 2014); doi: 10.1117/12.2055143
Show Author Affiliations
A. Bos, Technische Univ. Eindhoven (Netherlands)
TNO (Netherlands)
R. Henselmans, TNO (Netherlands)
P. C. J. N. Rosielle, Technische Univ. Eindhoven (Netherlands)
M. Steinbuch, Technische Univ. Eindhoven (Netherlands)
M. J. A. te Voert, TNO (Netherlands)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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