Design of an E-ELT M1 segment measurement machine with nanometer accuracy

conference paper
2014
Bos, A.

Henselmans, R.

Rosielle, P.C.J.N.

Steinbuch, M.

Voert, M.J.A. te
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.
Topics
European Extremely Large Telescope (E-ELT)Giant telescopesGround-based astronomyNANOMEFOSNon-contactSegment metrologyMachine designOptical telescopesUncertainty analysisMeasurement machines
TNO Identifier
523228
Repository link
https://resolver.tno.nl/uuid:555713b7-fe13-401b-8492-41848d06d50f
ISSN
0277786X
ISBN
9780819496195
Publisher
SPIE
Article nr.
91510X
Editor(s)
Cunningham, C.R.
Navarro, R.
Barto, A.A.
Files