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Proceedings Paper

Characterization of the van Cittert monochromator-based IR spectrophotometer
Author(s): Janos P. Makai; Janos Balazs; Laszlo Dobrentei; Istvan Reti
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Paper Abstract

The van Cittert system consists of two identical monochromators coupled together as a subtractive system. The usual narrow slit between the two monochromators is replaced by a wide one and a part of this wide slit is covered by a lamella mounted on a fine resolution translation stage. The wide slit transmits a wide spectral range but the lamella filters out a narrow range like a notch filter. The second monochromator collects and recombines the transmitted radiation at its exit slit. Behind the exit slit and the beam forming elements can the sample be positioned. By the translation of the lamella the center wavelength of the notch can be shifted over the whole spectral range covered by the wide slit. Carrying out spectrophotometric measurements the total transmitted power is measured at every stop of the lamella. From this array of measurement results the transmittance or the reflectance of the sample can be calculated as a function of the wavelength.

Paper Details

Date Published: 16 November 2000
PDF: 8 pages
Proc. SPIE 4131, Infrared Spaceborne Remote Sensing VIII, (16 November 2000); doi: 10.1117/12.406536
Show Author Affiliations
Janos P. Makai, Research Institute for Technical Physics and Material Science (Austria)
Janos Balazs, Research Institute for Technical Physics and Material Science (Hungary)
Laszlo Dobrentei, Research Institute for Technical Physics and Material Science (Hungary)
Istvan Reti, Research Institute for Technical Physics and Material Science (Hungary)


Published in SPIE Proceedings Vol. 4131:
Infrared Spaceborne Remote Sensing VIII
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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