A fast amplified fringe modulator and its waveform optimisation

Details A fast amplified fringe modulator and its waveform optimisation A fast amplified fringe modulator and its waveform optimisation

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6268e.101t&link_type=abstract

Advances in Stellar Interferometry. Edited by Monnier, John D.; Schöller, Markus; Danchi, William C.. Proceedings of the SPIE,

Computer Science

Scientific paper

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.

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