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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 43,
  • Issue 8,
  • pp. 1378-1384
  • (1989)

Spatially Encoded Fourier Transform Spectroscopy in the Ultraviolet to Near-Infrared

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Abstract

A spatial (Sagnac triangular common path) interferometer is described and evaluated for obtaining spectra in the 200-950 nm wavelength region. The interferometer has no moving parts, requires no entrance or exit slits, and is easy to align. A linear CCD is employed as the detector, allowing spectra to be simultaneously acquired. The performance of the interferometer is demonstrated for atomic emission and solution absorbance spectra. A method to remove the fixed-pattern response of the detector and optical system is demonstrated which effectively increases the dynamic range of the resulting spectra.

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