Results for: Photometry and Radiometry bulgeria
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Bulgaria, BIM (Bulgarian Institute of Metrology)
Spectral properties of materials , Transmittance, regular, spectral : 0.1 to 1
Spectrally-neutral material
Relative expanded uncertainty : 0.65 %
Direct measuring with standard spectrophotometer
Wavelength : 400 nm to 700 nm
Bandwidth : 0.5 nm to 5 nm
Approved on 21 October 2001
Photometry , Illuminance : 10 lx to 2000 lx
Tungsten lamp
Relative expanded uncertainty : 2.3 %
Standard lamps on photometric bench
Correlated colour temperature : 2042 K to 3000 K
Approved on 21 October 2001
Photometry , Luminous intensity : 10 cd to 1000 cd
Tungsten lamp
Relative expanded uncertainty : 1.5 %
Standard lamps, substitution on photometric bench
Correlated colour temperature : 2042 K to 3000 K
Approved on 21 October 2001
Spectral properties of materials , Reflectance, diffuse, spectral : 0.1 to 1
Spectrally-neutral material
Relative expanded uncertainty : 0.6 %
Comparison with standard reference materials for reflectance
Wavelength : 380 nm to 780 nm
Bandwidth : 1 nm to 3 nm
Geometry : d/0
Approved on 21 October 2001
Photometry , Luminous flux : 10 lm to 2000 lm
Tungsten lamp
Relative expanded uncertainty : 2.5 %
Goniophotometer
Correlated colour temperature : 2600 K to 3000 K
Approved on 21 October 2001
Photometry , Illuminance responsivity, tungsten source
Illuminance meter
Relative expanded uncertainty : 2.3 %
Standard lamps and substitution with reference photometer on photometric bench
Correlated colour temperature : 2800 K
Illuminance : 10 lx to 2000 lx
Approved on 20 April 2017
Spectral properties of materials , Radiance factor : 0.9 to 0.99
General material
Absolute expanded uncertainty : 4.0E-3
Comparison with reference materials for radiance factor
Wavelength : 380 nm to 780 nm
Bandwidth : 1 nm to 3 nm
Geometry : d/0
Approved on 21 October 2001

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