2 projects
Metrology for solid state lighting

LED lighting has a specific technology: - its optical performance and lifetime depend on the junction temperature of the LEDs and evolution over time is manifested by a very slow decline in the emitted flux  - LEDs have specific radiation spectra with a blue peak for the most common technology  - radiation is produced on small surfaces with no optics of concentration and therefore can be seen by the human eye with as very high intensity source points  - LEDs require specific electronics to be able to operate with electrical characteristics poorly taken into account in current measurement me

Traceability for surface spectral solar ultraviolet radiation

The European project, coordinated by the SFI-Davos (Switzerland), aims to develop methods for measuring direct, diffuse and global solar spectral irradiance between 290 nm and 400 nm with an uncertainty of 1% to 2% and new instruments for rapid measurement of spectral irradiance (UV to TF spectroradiometers) to take into account rapid variations in atmospheric conditions (measurement duration less than 10 s and repetition time less than 1 min).