A fast amplified fringe modulator and its waveform optimisation

Hrobjartur Thorsteinsson; David F. Buscher

doi:10.1117/12.671442

28 June 2006 A fast amplified fringe modulator and its waveform optimisation

Hrobjartur Thorsteinsson, David F. Buscher

Proceedings Volume 6268, Advances in Stellar Interferometry; 626837 (2006) https://doi.org/10.1117/12.671442
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Hrobjartur Thorsteinsson and David F. Buscher "A fast amplified fringe modulator and its waveform optimisation", Proc. SPIE 6268, Advances in Stellar Interferometry, 626837 (28 June 2006); https://doi.org/10.1117/12.671442

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