Design and modeling of an IR spectrophotometer

Janos P. Makai; Robert D. Saunders

doi:10.1117/12.188693

17 October 1994 Design and modeling of an IR spectrophotometer

Janos P. Makai, Robert D. Saunders

Proceedings Volume 2269, Infrared Technology XX; (1994) https://doi.org/10.1117/12.188693
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Janos P. Makai and Robert D. Saunders "Design and modeling of an IR spectrophotometer", Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); https://doi.org/10.1117/12.188693

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