Traceability for SSL measurements

The aim of this work was to develop and adopt metrology to measure SSL sources under
the special emphasis of adaptive boundary conditions and to build up the traceability chains to SI. For international harmonisation the results and test procedures developed within the CALiPER programme of the DoE of the United States were also taken into account. Five topics in SSL metrology were identified for urgent attention:

Traceable measurement of the electrical and optical power

This task developed and adopted metrology for traceable electrical and optical power measurements of (pulsed) SSL sources.

Mesopic and scotopic measurements and their traceability to SI

This task developed reference photometers for traceable optical measurements on SSL sources at low and very-low light level conditions where the human eye response has the so-called mesopic and scotopic response, respectively.

Traceable spectral measurements

This task developed and implemented methods for traceable spectral characterisation of SSL sources.

Traceable near field-geometrical measurements and colour rendition

This task developed a guideline for the calibration of near-field goniometer that are employed to resolve the angular luminance distribution of SSL sources for modelling the illuminance of that source in a far-field.

Traceable influence of environmental conditions

This task developed a facility for measuring luminous flux and electrical power as function of temperature and relative humidity.

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