New traceability chains in the photometric and radiometric measurements at the National Metrology Institute of Turkey

Optical Standards Laboratory of the National Metrology Institute of Turkey (UME) performs photometric, radiometric and fiber optics measurements related to SI-based units. The new traceability chains in the photometric and radiometric measurements are established in 2004, where top of the chains is based on primary-level optical power measurements with a cryogenic radiometer facility.