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Directional Reflectance and Emissivity of an Opaque Surface

Nicodemus, Fred E.·1965·Applied Optics

Abstract

Concepts, terminology, and symbols are presented for specifying and relating directional variations in reflectance and emissivity of an opaque surface element. Their relationship to more familiar concepts, including those of perfectly diffuse and specular reflectance, is given, and they are applied to illustrative examples. It is shown that, when the usual reciprocity relationship holds, the reflectance for a ray incident on an opaque surface element is related by Kirchhoff's law to the emissivity of that element for a ray emitted along the same line in the opposite sense.

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Metadata

Authors
Nicodemus, F. E.
Venue
Applied Optics
Published
1965-07-01
Volume
4
Issue
7
Pages
767
ISSN
  • 0003-6935 (ISSN-L)
  • 1539-4522
OpenAlex
W2037914589
Cited by
724
References
0
FWCI
10.60
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Directional Reflectance and Emissivity of an Opaque Surface. https://app.cochat.ai/papers/10.1364/ao.4.000767
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Nicodemus, F. E. (1965). Directional Reflectance and Emissivity of an Opaque Surface. Applied Optics. https://doi.org/10.1364/ao.4.000767

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.