Beamsplitters for astronomical optical interferometry

Details Beamsplitters for astronomical optical interferometry Beamsplitters for astronomical optical interferometry

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2477..132p&link_type=abstract

Proc. SPIE Vol. 2477, p. 132-148, Spaceborne Interferometry II, Robert D. Reasenberg; Ed.

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We discuss an optical interferometer's beamsplitter from the points of view of visibility loss and phase, critical to astrometry. A beamsplitter having no symmetries is described by 16 parameters, all functions of optical frequency; if all symmetries are present this number is reduced to four, only two of which are relevant to astronomical interferometry. We have developed a novel multi-layer design which covers fully a factor of three in wavelength while contributing a minimum of visibility loss, light loss, and systematic error.

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