Dual-wavelength low-coherence instantaneous phase-shifting interferometer to measure the shape of a segmented mirror with subnanometer precision

Wilhelm, Rainer; Luong, Bruno; Courteville, Alain; Estival, Sébastien; Gonté, Frédéric; Schuhler, Nicolas

doi:10.1364/ao.47.005473

Public

Dual-wavelength low-coherence instantaneous phase-shifting interferometer to measure the shape of a segmented mirror with subnanometer precision

Published in Applied Optics • Oct 7, 2008

Authors:

Rainer Wilhelm

Bruno Luong

Alain Courteville

Abstract

We present a noncontact optical metrology measuring the pistons and tip/tilt angles of the 61 hexagonal segments of a compact-sized segmented mirror. The instrument has been developed within the scope of a design study for the European Extremely Large Telescope (E-ELT). It is used as reference senso...

Subject

Optics

Metrology

Piston (optics)

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