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CMCs Ionizing Radiation
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Reflectance factor (2)
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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Photometry and Radiometry for United Kingdom (.PDF file)
Reflectance factor. General material, 0.25 % to 300000 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.01% + 0.0034R)
Reference reflectometer
Wavelength range: 350 nm to 400 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007
 
Reflectance factor. General material, 0.1 % to 300000 %
Absolute expanded uncertainty (k = 2, level of confidence 95 %): (0.01% + 0.0019R)
Reference reflectometer
Wavelength range: 400 nm to 1000 nm
Bandwidth: 10 nm to 20 nm
Uncertainty values are for 0/45 geometry and white Spectralon. Uncertainty varies with scattering geometry and angular dependence of scattering properties of material
Approved on 07 May 2007