Spectral Efficiency of the SpectraSpan III Echelle Grating Spectrometer

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The efficiency of an echelle grating spectrometer incorporating prism cross-dispersion is empirically evaluated over a broad wavelength range incorporating a large number of orders. A derived parameter, the spectrometer efficiency, proportional to the spectrometer luminosity, conveniently gauges dynamic features of the echelle efficiency. Characteristics of efficiency over broad wavelengths suggested by earlier work are clearly observed. The shift of blaze wavelength with decreasing order of diffraction, predicted in a recent model of echelle grating efficiency, is experimentally documented.

Keywords: Blaze angle; Diffraction grating; Echelle grating; Echelle spectrometer; Efficiency; Luminosity

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702854249187

Affiliations: 1: SpectraMetrics, Inc., 75 Foundation Ave., Haverhill, Massachusetts 01831; present address: Perkin-Elmer Corporation, 901 Ethan Allen Highway, Ridge-field, CT 06877 2: Dept of Mech. Eng., U.S. Naval Academy, Annapolis, Maryland 21402 3: Dept. of Chemistry, University of Connecticut, Storrs, Connecticut 06268 4: Army Corps of Eng., Missouri River Div., 420 S. 18th St., Omaha, Nebraska 68102

Publication date: January 1, 1985

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