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 United Kingdom, NPL (National Physical Laboratory)    Complete CMCs in Photometry and Radiometry for United Kingdom (.PDF file)
  
Colour, surface, L*a*b*. Fluorescent material, L* = 0 to L* = 160   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.003   Reference spectrofluorimeter   Irradiation conditions: monochromator   Specific measurement conditions: 0/45   Type of fluorescent material: general   Approved on 07 May 2007 
 Colour, surface, L*a*b*. Fluorescent material, a*, b* = 200 to a*, b* = 200   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 1.2   Reference spectrofluorimeter   Irradiation conditions: monochromator   Specific measurement conditions: 0/45   Type of fluorescent material: general   Approved on 07 May 2007 
 Colour, surface, L*a*b*. Diffusely reflecting material, L* = 0 to L* = 100   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.15   Integrating sphere spectrophotometer   Specific measurement conditions: 0/d, 2 nm bandwidth   Other types of material can also be calibrated Approved on 07 May 2007 
 Colour, surface, L*a*b*. Diffusely reflecting material, a*, b* = 200 to a*, b* = 200   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.1   Integrating sphere spectrophotometer   Specific measurement conditions: 0/d, 2 nm bandwidth   Other types of material can also be calibrated Approved on 07 May 2007 
 Colour, transmitted, x, y, Y. General material, x, y = 0 to x, y = 0.9   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0002   Spectrophotometer   Specific measurement conditions: regular transmittance geometry   Type of material: nonfluorescent 
 Colour, transmitted, x, y, Y. General material, Y = 0 to Y = 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.003   Spectrophotometer   Specific measurement conditions: regular transmittance geometry   Type of material: nonfluorescent 
 Colour, transmitted, L*a*b*. General material, L* = 0 to L* = 100   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.05   Spectrophotometer   Specific measurement conditions: regular transmittance geometry   Type of material: nonfluorescent 
 Colour, transmitted, L*a*b*. General material, a*, b* = 200 to a*, b* = 200   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.05   Spectrophotometer   Specific measurement conditions: regular transmittance geometry   Type of material: nonfluorescent 
 Wavelength. Fibre optic source, 800 nm to 1700 nm   Absolute expanded uncertainty (k = 2, level of confidence 95 %) in nm: 0.3   Spectrum analyser 
 Wavelength. Optical spectrum analyser, 600 nm to 1700 nm   Absolute expanded uncertainty (k = 2, level of confidence 95 %) in pm: 34   Lamp / wavemeter / transition locked laser   Measurements can be made at specified wavelengths within this range, depending on the availability of a suitable laser source. The uncertainty will depend on the properties of the OSA under calibration. 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 3E05 to 3.5E04, varies as the logarithm of the measurand   Reference spectrophotometer   Wavelength: 250 nm to 749 nm   Bandwidth: < 3 nm 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 1E05 to 4.5E04, varies as the logarithm of the measurand   Reference spectrophotometer   Wavelength: 750 nm to 2500 nm   Bandwidth: < 3 nm 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0017 at 0.73   Scanning spectrophotometer   Wavenumber: 3990 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.00065 at 0.14   Scanning spectrophotometer   Wavenumber: 3512 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0011 at 0.36   Scanning spectrophotometer   Wavenumber: 3031 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.00052 at 0.06   Scanning spectrophotometer   Wavenumber: 2739 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.00079 at 0.17   Scanning spectrophotometer   Wavenumber: 2598 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.00064 at 0.10   Scanning spectrophotometer   Wavenumber: 2473 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, regular, spectral. Spectrallyneutral material, 1E03 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0001 at 0.0001   Scanning spectrophotometer   Wavenumber: 2010 cm^{1}   Bandwidth: 2 cm^{1} to 15 cm^{1}   Specific measurement conditions: measured at 5 ° and f/6. Values calculated for normal incidence and a range of f/n's.   Other types of material can also be calibrated. Uncertainties at other transmittance values available on request. Approved on 07 May 2007 
 Transmittance, diffuse, spectral. Spectrallyneutral material, 0 to 1   Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.01   Spectrophotometer with integrating sphere accessory   Wavelength range: 200 nm to 800 nm   Bandwidth: 0.5 nm to 2 nm   Specific measurement conditions: 0/d   Other types of material can also be calibrated 
