Interferometry at the vacuum ultra-violet limit

Details Interferometry at the vacuum ultra-violet limit Interferometry at the vacuum ultra-violet limit

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.354..231t&link_type=abstract

In ESA, Targets for Space-Based Interferometry p 231-234 (SEE N93-31750 12-89)

Astronomy and Astrophysics

Astronomy

Astronomical Interferometry, Interferometers, Ultraviolet Spectra, Ultraviolet Spectrometers, Beam Splitters, Fourier Transformation, Spectrum Analysis

Scientific paper

The technical implications of the results obtained with a vacuum ultraviolet Fourier transform spectrometer in the wavelength region from 300 to 160 nm are reported. At present the VUV limit is set by the optical homogeneity of the MgF2 substrate. To extend the limit of VUV interferometry below 160 nm it will be necessary both to minimize the substrate thickness and to develop a test facility to enable improvement of the substrate material. Since index variations scale vary rapidly with wavelength, a test interferometer for the VUV region was designed. Both these improvements are essential if interferometry at wavelengths down to Lyman alpha is to be achieved.

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