Nulling Interferometry: A New Concept of Achromatic Phase Shifter Using Cellular Mirrors

Details Nulling Interferometry: A New Concept of Achromatic Phase Shifter Using Cellular Mirrors Nulling Interferometry: A New Concept of Achromatic Phase Shifter Using Cellular Mirrors

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confr..43r&link_type=abstract

Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s

Computer Science

Scientific paper

A new idea to obtain a phase shift (pi or any value) on a broad band (typically delta lambda / lambda = 0.7) is proposed. Based on a unique component, a twin cellular mirror, it offers the great advantage of a robust nulling interferometer with very few components and a fully symmetric optical scheme. Both the distribution of the cells thickness and their 2D arrangement obey to rather strict rules derived from some peculiar arithmetical laws. Using MOEMS could add a great flexibility. The theoretical frame will be presented, as well as results of modeling and, hopefully, first laboratory results.

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