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CMCs Ionizing Radiation
CMCs General Physics (65)
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Properties of materials (65)
Absorbance, regular, spectral (20)
Transmittance, regular, spectral (12)
Colour, surface, x, y, Y (6)
Colour, surface, L*a*b* (6)
Reflectance, regular, spectral (3)
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methane
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EURAMET (65)
United Kingdom (65)
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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Photometry and Radiometry for United Kingdom (.PDF file)
Reflectance, diffuse, spectral. Spectrally-neutral material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.003
Reference reflectometer
Wavelength range: 350 nm to 1000 nm
Bandwidth: < 20 nm
Specific measurement conditions: spatial integration
Other types of material can also be calibrated
Approved on 20 April 2017
 
Reflectance, regular, spectral. Spectrally-neutral material, 0.003 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.002 to 0.003, depending on wavelength and reflectance
Reference reflectometer
Wavelength range: 320 nm to 1600 nm
Bandwidth: < 20 nm
Specific measurement conditions: as required
Other types of material can also be calibrated
Approved on 20 April 2017
 
Reflectance, regular, spectral. General material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.001 to 0.003
Spectrophotometer with V-only reflectometer
Wavenumber range or wavelength range: 4000 cm-1 to 180 cm-1 or 2.5 µm to 56 µm
Bandwidth: 2 cm-1 to 10 cm-1
Specific measurement conditions: 10 °
Approved on 07 May 2007
 
Reflectance, regular, spectral. General material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0003 to 0.006 (depending on polarisation and angle)
Spectrophotometer with variable angle reflectometer
Wavenumber range or wavelength range: 4000 cm-1 to 180 cm-1 or 2.5 µm to 56 µm
Bandwidth: 2 cm-1 to 10 cm-1
Specific measurement conditions: 10 ° to 85 °
Approved on 07 May 2007
 
Reflectance, hemispherical, spectral. Spectrally-neutral material, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 4E-03 to 3.8E-04, varies with wavenumber
Spectrophotometer with hemispherical reflectometer
Wavelength range: 4000 cm-1 to 180 cm-1
Bandwidth: 2 cm-1 to 10 cm-1
Specific measurement conditions: hemispherical reflectometer
Other types of material can also be calibrated