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Proceedings Paper

A fast amplified fringe modulator and its waveform optimisation
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Paper Abstract

For temporally modulated fringe patterns, stellar interferometric fringe acquisition rates must generally exceed 1kHz to avoid significant atmospheric related loss of contrast and cross-talk between fringe components. Furthermore, sufficient travel and high waveform stability in the temporal phase modulation are essential to clean fringe visibility extraction. The authors present a system utilising a piezoelectric actuator that takes advantage of a resonating stage to achieve an accurate and stable high amplitude motion. Nanometre accuracy in waveform optimisation and in continuous waveform stability is demonstrated.

Paper Details

Date Published: 28 June 2006
PDF: 12 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 626837 (28 June 2006); doi: 10.1117/12.671442
Show Author Affiliations
Hrobjartur Thorsteinsson, Cavendish Lab., Univ. of Cambridge (United Kingdom)
David F. Buscher, Cavendish Lab., Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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