Abstract
The absorption spectra of some thin layers in a color reversal film were separately measured non-destructively by the method of correlation photoacoustics. Each layer measured was several micrometers thick except the substrate layer, showing that the thickness resolution attained in this experiment was approximately one order of magnitude improved than that obtained for the natural leaves.
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Uejima, A., Sugitani, Y. & Nagashima, K. Depth Resolved Spectroscopic Analysis of Color Reversal Films by Correlation Photoacoustics. ANAL. SCI. 1, 5–8 (1985). https://doi.org/10.2116/analsci.1.5
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DOI: https://doi.org/10.2116/analsci.1.5