Measurement of spectral directional emissivity of materials and coatings in the infrared region of spectrum

Vitkovskii, V. V.; Gorshenev, V. G.; Potapov, Yu. F.

doi:10.1134/s0040601509030100

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Spectral emissivity in a wide wavelength range is measured by dispersive [26][27][28][29][30][31] or Fourier-transform spectrometers [1,2,5,7,[32][33][34]. The spectral emissivity in a narrow wavelength range and band emissivity are determined by selective detectors [12,13,[35][36][37] (narrowband and wideband noncontact thermometers as well as interference filters).…”

Section: Direct Radiometric Methodsmentioning

confidence: 99%

Survey of emissivity measurement by radiometric methods

Honner

2015

Appl. Opt.

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A survey of the state of the art in the field of spectral directional emissivity measurements by using radiometric methods is presented. Individual quantity types such as spectral, band, or total emissivity are defined. Principles of emissivity measurement by various methods (direct and indirect, and calorimetric and radiometric) are discussed. The paper is focused on direct radiometric methods. An overview of experimental setups is provided, including the design of individual parts such as the applied reference sources of radiation, systems of sample clamping and heating, detection systems, methods for the determination of surface temperature, and procedures for emissivity evaluation.

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Section: Direct Radiometric Methodsmentioning

confidence: 99%

Survey of emissivity measurement by radiometric methods

Honner

2015

Appl. Opt.

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“…Determination of the value of surface emissivity is one of the essential conditions during thermographic quantitative temperature measurement. The emissivity depends on the material, its surface finish, radiation wavelength, body temperature, radiation angle and, with some wavelengths, the surface colour as well (Vitkovskii et al, 2009). Therefore, owing to the colour influence on the emissivity value, most of the thermal cameras used are within the wavelength range of 8-14 mm.…”

Section: Current Methods Of Determining Surface Emissivity Valuementioning

confidence: 99%

Infrared thermographic measurement of the surface temperature and emissivity of glossy materials

Alexa

Solař

Čmiel

et al. 2017

Journal of Building Physics

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Determination of the surface temperature and emissivity of glossy materials is a complicated task due to the relatively wide range of emissivity values and the reflection of infrared radiation from surrounding objects. As a consequence, standard methods used in infrared thermography are not applicable. In this article, an alternative method is proposed for the measurement of the surface temperature and emissivity of glossy materials used in the external structures of buildings that is based on an external source of thermal radiation. It is shown that the method gives quite accurate values of emissivity of both low-and high-emissivity glossy materials, whereas the surface temperature of low-emissivity glossy materials is less accurate and strongly depends on the accuracy of the used thermal camera.

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