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Proceedings Paper

Beamsplitters for VUV Fourier transform spectroscopy
Author(s): Anne P. Thorne; Geoff Cox; Peter L. Smith; William H. Parkinson
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Paper Abstract

Fourier transform spectroscopy (FTS) combines the advantages of high resolution (sufficient to resolve Doppler line widths) with large optical throughput and an accurately linear wavenumber scale. The resolving power of about a million required for studies of atoms or molecules at 300 K has previously been achieved with the Imperial College FT spectrometer for VUV wavelengths down to 178 nm, the cut-off of the silica beamsplitter. This beamsplitter has a unique configuration, designed to ensure alignment at short wavelengths. We have now extended the wavelength range further into the VUV by replacing it with a similar beamsplitter made from a single MgF2 crystal. The performance of the spectrometer with the new beamsplitter has been evaluated, and emission spectra from hollow cathode lamps have been recorded down to about 150 nm with a resolution of 0.08 cm-1, representing a resolving power of 850,000.

Paper Details

Date Published: 14 September 1994
PDF: 7 pages
Proc. SPIE 2282, Ultraviolet Technology V, (14 September 1994); doi: 10.1117/12.186601
Show Author Affiliations
Anne P. Thorne, Imperial College of Science, Technology & Medicine (United Kingdom)
Geoff Cox, Imperial College of Science, Technology & Medicine (United Kingdom)
Peter L. Smith, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William H. Parkinson, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 2282:
Ultraviolet Technology V
Robert E. Huffman; Christos G. Stergis, Editor(s)

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