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

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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.

Keywords: CCD; Charge-coupled device; Fourier transform spectroscopy; Holography; Spatial interferometry; Spectroscopic instrumentation; Ultraviolet/visible spectroscopy

Document Type: Research Article


Affiliations: 1: Chemistry Department, University of Arizona, Tucson, Arizona 85721; present address: Chemistry Department, Stanford University, Stanford, CA 94305-5080 2: Chemistry Department, University of Arizona, Tucson, Arizona 85721

Publication date: November 1, 1989

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