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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
 
United States, NIST (National Institute of Standards and Technology)
Complete CMCs in Photometry and Radiometry for United States (.PDF file)
BRDF. General material, 0.01 1/sr to Infinity 1/sr
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.4 to 2 , increasing with decreasing wavelength
Spectrophotometer
Wavelength range: 250 nm to 400 nm
Bandwidth: 14 nm
Conditions: all in-plane angles
See http://www.nist.gov/pml/div685/grp03/spectrophotometry.cfm
Approved on 28 March 2017
Internal NMI service identifier: NIST/38060S
 
BRDF. General material, 0.001 1/sr to Infinity 1/sr
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.4 to 0.6, increasing with increasing wavelength
Spectro-photometer
Wavelength range: 400 nm to 1100 nm
Bandwidth: 14 nm
Conditions: all in-plane angles
See http://www.nist.gov/pml/div685/grp03/spectrophotometry.cfm
Approved on 28 March 2017
Internal NMI service identifier: NIST/38060S
 
Chromatic dispersion, slope. Single mode optical fiber, 0.25 ps/nm2 to 2 ps/nm2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.3
RF phase-shift measurement
Wavelength measured near dispersion zero: 1288 nm to 1338 nm, and 1442 nm to 1620 nm
Specification standard used: interferometrically-calibrated variable air gap
Approved on 29 June 2010
Internal NMI service identifier: NIST/42190S
 
Chromatic dispersion, zero wavelength. Single mode optical fiber, 1296 nm to 1612 nm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 0.005
RF phase-shift measurement
Wavelength range: 1296 nm to 1330 nm, and 1450 nm to 1612 nm
Specification standard used: interferometrically-calibrated variable air gap
Approved on 29 June 2010
Internal NMI service identifier: NIST/42190S
 
Color, emitted, x, y. General source, no range given 
Absolute expanded uncertainty (k = 2, level of confidence 95%): x: 0.0006, y: 0.0002
Spectroradiometer
Bandwidth: 1 nm to 5 nm
Type of source: tungsten source
Discharge lamps, LEDs, and other sources can be measured.
Approved on 28 March 2017
Internal NMI service identifier: NIST/37100S
 
Colour surface L,a,b. General material, no range given 
Absolute expanded uncertainty (k = 2, level of confidence 95%): L: 0.06 to 0.2, a: 0.01 to 0.7, b: 0.02 to 0.3 (depending on the surface color)
0/45 spectroradiometer
Specific measurement conditions: 0/45 reflectance, 360 nm to 780 nm, CIE source D65, CIE 1964 observer
Approved on 21 September 2005
Internal NMI service identifier: NIST/38091S


 
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