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Laboratory measurement of diffuse spectral reflectance and transmittance of some natural objects in the near-infrared

Experimentelle Bestimmung des spektralen diffusen Reflexions- und Transmissionsvermögens einiger natürlicher Substanzen im nahen Infrarot

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Summary

Laboratory measurement of diffuse spectral reflectance in the region from 0.4 to 2.5 μ was carried out for several kinds of materials like sand, concrete, white marble and brick. The diffuse reflectance of a leaf of several kinds of vegetables was also investigated. A method, although it is indirect, was intended to measure the diffuse spectral transmission of a thin skin such as a leaf. The intensities of both reflection and transmission of a leaf are low in the visible region, but increase remarkably in the near-infrared region. The water absorption bands become important with increasing wavelength.

Zusammenfassung

Das spektrale diffuse Reflexionsvermögen im Wellenlängenbereich 0,4 bis 2,5 μ wurde für verschiedene Oberflächen, wie Sand, Beton, weißen Marmor und Ziegel, gemessen. Ebenso wurde das diffuse Reflexionsvermögen eines Blattes verschiedener Gemüsearten untersucht. Ein anderes, indirektes Verfahren erlaubt die Messung des spektralen diffusen Transmissionsvermögens eines dünnen Gegenstandes, z. B. eines Blattes. Reflexions- und Transmissionsvermögen eines Blattes sind klein im sichtbaren Wellenlängenbereich, nehmen jedoch im nahen Infrarot stark zu. Mit zunehmender Wellenlänge erlangen die Absorptionsbanden des Wassers Bedeutung.

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Author notes

  1. Takashi Sasamori

    Present address: National Center for Atmospheric Research, 80302, Boulder, Colorado, U.S.A.

  2. Yasufumi Emori

    Present address: Department of Engineering, Chiba University, Chiba, Japan

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    1. Takashi Sasamori
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    2. Yasufumi Emori
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    With 12 Figures

    The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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    Sasamori, T., Emori, Y. Laboratory measurement of diffuse spectral reflectance and transmittance of some natural objects in the near-infrared. Arch. Met. Geoph. Biokl. B. 19, 133–148 (1971). https://doi.org/10.1007/BF02332260

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    • DOI: https://doi.org/10.1007/BF02332260

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