National Standard of Radiant Flux and Irradiance

The Standard Implements the Unit of Power (W) Corresponding to the Energy of Optical Radiation in the Spectral Range of 280 nm to 12,500 nm.

This unit serves as the basis for the realization of the unit of luminous intensity and the unit of temperature for temperatures exceeding 1064°C. Additionally, it is fundamental for the calibration of optical radiometers used in optical telecommunications, healthcare, and engineering. The realization is based on so-called trap detectors with a known quantum efficiency for converting the amount of electrical charge into the number of photons with a known wavelength and on the comparison of heating by electrical current and optical radiation.

Documents for download

• Osvedčenie (certifikát) (pdf, 1.2 MB)