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Proceedings Paper

Nulling interferometric beam combiner utilizing dielectric plates: experimental results in the visible broadband
Author(s): Rhonda M. Morgan; James H. Burge; Neville J. Woolf
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Paper Abstract

This paper describes a laboratory experiment of achromatic nulling in the visible to SIM requirements. The experiment employs phase shifting interferometry techniques on a spectrally dispersed fringe to measure the phase as a function of wavelength. This phase is then used by a control system that adjusts the tilt of the plates and the air path difference until a satisfactory level of null is achieved. A fast servo adjusts the air path difference to stabilize the phase to the nanometer level. The paper includes a discussion of the design issues, the experimental measure of phase versus wavelength, a description of the control system, and a preliminary measure of the null.

Paper Details

Date Published: 5 July 2000
PDF: 9 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390224
Show Author Affiliations
Rhonda M. Morgan, Optical Sciences Ctr./Univ. of Arizona (United States)
James H. Burge, Optical Sciences Ctr./Univ. of Arizona and Steward Observatory/Univ. of Arizona (United States)
Neville J. Woolf, Steward Observatory/Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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