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Proceedings Paper

Testing the accuracy of a laser calorimeter by comparison with an FTIR
Author(s): Etsuo Kawate
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Paper Abstract

A laser calorimeter has been developed with a sensitivity of the order of 10-6cm-1 with one watt of laser power using a CO2 laser (9(mu) m to 11(mu) m) in the infrared region. In order to evaluate the accuracy of the laser calorimeter, the absorptance of a thin and semitransparent silicon sample was measured using the laser calorimeter in the infrared region and the transmittance and the reflectance of the same sample were also measured by a conventional Fourier-transform infrared spectrometer. Two absorptances obtained from two independent methods agree will within 2%, however it becomes clear that an interval of a Fabry-Perot interference fringe doesn't agree in absorptance spectra measured by these methods.

Paper Details

Date Published: 11 October 2000
PDF: 9 pages
Proc. SPIE 4103, Optical Diagnostic Methods for Inorganic Materials II, (11 October 2000); doi: 10.1117/12.403584
Show Author Affiliations
Etsuo Kawate, National Research Lab. of Metrology (Japan)


Published in SPIE Proceedings Vol. 4103:
Optical Diagnostic Methods for Inorganic Materials II
Leonard M. Hanssen, Editor(s)

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