Difficulties in measuring emissivity
Thermal Emissivity measurement

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R2747 V1 Article

Difficulties in measuring emissivity
Thermal Emissivity measurement

Authors : Jean-Pierre MONCHAU, Jacques HAMEURY

Publication date: June 10, 2018 | Lire en français

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7. Difficulties in measuring emissivity

This section deals only with measurements on opaque materials.

7.1 Direct methods for measuring radiation emitted by the material

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7.1.1 Measurement of spectral directional emissivity or total directional emissivity

This measurement is made by direct comparison of the radiation produced by the material with the radiation produced by a reference source; the measurement technique is directly based on one of the definitions given by the relationships

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