Accurate measurement of light sources is of key importance due to the high energy consumption of lighting. To determine the energy efficiency of a lamp, both its luminous flux, light output as perceived by humans, and the active electrical power consumed need to be measured accurately. Both of these measurements pose challenges, especially when novel light sources, such as light emitting diodes (LEDs), are measured.
Metrology Research Institute is equipped with a wide range of photometric equipment, such as integrating sphere detectors and sources, standard lamps, photometers, and luminance meters, which allow us to perform measurements and calibrations on all key photometric quantities. These key quantities include luminous intensity, illuminance, luminous flux, and luminous efficacy.
Current projects related to photometry
The photometry subgroup is currently running or participating in the following projects. Get more information by opening them with a click and then optionally following the link to local project pages.
Metrology Research Institute is involved in European Partnership of Metrology Programme (EPM) Project HiDyn (Support for the standardisation of luminance distribution measurements for assessing glare and obtrusive light using high-dynamic-range imaging systems).
Metrology Research Institute is involved in European Metrology Programme for Innovation and Research (EMPIR) Project MetTLM - Metrology for Temporal Light Modulation.
The lifetime of a product is a key parameter when accessing the total costs of different lighting solutions. Aging studies have been carried out in several internal, national, and international projects.
Past projects related to photometry
The group has succesfully completed the following photometry projects in the past years:
Metrology Research Institute is involved in European Metrology Programme for Innovation and Research (EMPIR) Project RevStdLED - Revision and extension of standards for test methods for LED lamps, luminaires and modules.
Metrology Research Institute was involved in European Metrology Programme for Innovation and Research (EMPIR) Project PhotoLED - "Future Photometry Based on Solid-State Lighting Products".
Metrology Research Institute was involved in European Metrology Research Programme (EMRP) project MESaIL - "Metrology for Efficient and Safe Innovative Lighting".
Metrology Research Institute has studied how unknown correlations in spectral irradiance data affect the quantities derived from this data.