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Proceedings Paper

Design and modeling of an IR spectrophotometer
Author(s): Janos P. Makai; Robert D. Saunders
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Paper Abstract

A high accuracy dispersive spectrophotometer for transmittance and reflectance measurements has been designed to provide calibration and standards in the 2 - 25 micrometers wavelength region. The system consists of the traditional modules of a double monochromator based spectrophotometer, i.e., source unit, predisperser, monochromator, detector, and sample, but organizes them in a novel way. The sample is positioned between the predisperser and the grating monochromator to achieve the highest feasible signal-to-noise ratio with a room temperature system. A convertible beam path allows measurements either in a collimated or in a converging beam. The minimum optical bandwidth of the system is 0.2%, consequently high accuracy measurements of state-of-the-art interference filters can be carried out. The system is under construction. The optical lay-out, the error sources, and uncertainties of the system are discussed.

Paper Details

Date Published: 17 October 1994
PDF: 8 pages
Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); doi: 10.1117/12.188693
Show Author Affiliations
Janos P. Makai, Research Institute for Technical Physics (Hungary)
Robert D. Saunders, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 2269:
Infrared Technology XX
Bjorn F. Andresen, Editor(s)

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