State Primary Standard of Units of Spectral Coefficients of Directional Transmission, Mirror and Diffuse Reflection in the Wavelength Range from 0.2 μm to 25.0 μm

Reproduction and maintenance of the units of regular transmission, regular and diffuse reflection spectral coefficients. Transferring of the units of regular transmission, regular and diffuse reflection spectral coefficients to the secondary standards, working standards and to the working measuring standards by means of the method of direct measurements and also transferring of the sizes of the units of integral and reduced coefficients of regular transmission, regular and diffuse reflection to the working standards (to the sets of measures and photometers) by means of the method of indirect measurements in accordance with DSTU 7122:2009 “Metrology. National verification scheme for measuring instruments of spectral integrated and reduced coefficient of regular transmission, regular and diffuse reflection in the wavelength range from 0,2 μm to 25,0 μm”.

Metrological characteristics

Range

for spectral coefficients of directional transmission from 0,01 до 0,95

for spectral coefficients of specular reflection from 0,03 до 0,98

for spectral coefficients of diffuse reflection from 0,02 до 1,0

Uncertainty by type A (uA)

0,0005

0,001

0,005

Uncertainty by type B (uB)

0,0004

0,004

0,006

Total standard uncertainty (uC)

0,0006

0,004

0,008

Extended uncertainty (U)

0,0012

0,008

0,016