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Calibration and Measurement Capabilities
Photometry and Radiometry
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
 
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Your selection : Photometry and Radiometry
 
Bulgaria, BIM (Bulgarian Institute of Metrology)
Complete CMCs in Photometry and Radiometry for Bulgaria (.PDF file)
Illuminance. Tungsten lamps, 10 lx to 2000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.3
Standard lamps on photometric bench
Correlated color temperature: 2042 K to 3000 K
 
Illuminance responsivity, tungsten source. Illuminance meter.Measurand unit,  A/lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.3
Standard lamps and substitution with reference photometer on photometric bench
Correlated color temperature: 2800 K
Illuminance: 10 lx to 2000 lx
Approved on 20 April 2017
 
Luminous flux. Tungsten lamps, 10 lm to 2000 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.5
Goniophotometer
Correlated color temperature: 2600 K to 3000 K
 
Luminous intensity. Tungsten lamps, 10 cd to 1000 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.5
Standard lamps, substitution on photometric bench
Correlated color temperature: 2042 K to 3000 K
 
Radiance factor. General material, 0.9  to 0.99 
Absolute expanded uncertainty (k = 2, level of confidence 95%): 0.004
Comparison with reference materials for radiance factor
Wavelength: 380 nm to 780 nm
Bandwidth: 1 nm to 3 nm
Geometry: d/0
 
Reflectance, diffuse, spectral. Spectrally-neutral material, 0.1  to 1 
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.6
Comparison with standard reference materials for reflectance
Wavelength: 380 nm to 780 nm
Bandwidth: 1 nm to 3 nm
Geometry: d/0


 
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