Picometer differential-phase measurements in the laboratory

Gautam Vasisht; E. Robert Ligon; Erik E. Bloemhof; M. Mark Colavita

doi:10.1117/12.672619

28 June 2006 Picometer differential-phase measurements in the laboratory

Gautam Vasisht, E. Robert Ligon, Erik E. Bloemhof, M. Mark Colavita

Proceedings Volume 6268, Advances in Stellar Interferometry; 62682X (2006) https://doi.org/10.1117/12.672619
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We describe the results of laboratory experiments, using a mock-up stellar interferometer equipped with specialized hardware, undertaken to measure differential-phase to considerable precision (0.1 mrad) over an octave of bandwidth in the infrared. Differential-phase is a precision technique that can detect subtle temporal changes in the relative (color-dependent) photocenter of an astronomical target - making it useful for direct detection of some hot-Jupiter planets from the ground. The set up described herein was built as part of the Keck Interferometer project.

Citation Download Citation

Gautam Vasisht, E. Robert Ligon, Erik E. Bloemhof, and M. Mark Colavita "Picometer differential-phase measurements in the laboratory", Proc. SPIE 6268, Advances in Stellar Interferometry, 62682X (28 June 2006); https://doi.org/10.1117/12.672619

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