Untangling light in noisy luminous environments - CSTB - Centre Scientifique et Technique du Bâtiment
Article Dans Une Revue Lighting research and technology Année : 2024

Untangling light in noisy luminous environments

Résumé

Electric light sources, including displays and luminaires, often exhibit rapid light fluctuations called temporal light modulation (TLM). TLM can be seen as their electrical footprint. This work demonstrates that TLM can be remotely detected and used to perform in situ photometric and spectroradiometric measurements of very low light levels superimposed to intense backgrounds. Illuminance levels about 500 000 times smaller than the background were reliably measured by lock-in detection, allowing photometric measurements to be performed during daytime, even with sunny conditions. Using a new type of optical lock-in spectrometer, it becomes possible to retrieve spectral quantities through the TLM of the light source. The spectral distribution of an LED lamp was measured against a daylit background more than 1500 times brighter. Lock-in detection is an excellent technique to perform in situ measurements of electric light, even at very low level, in the presence of daylight and other background lights, opening interesting opportunities to characterize anthropogenic light pollution.
Fichier principal
Vignette du fichier
martinsons-picard-2024-untangling-light-in-noisy-luminous-environments.pdf (2.51 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04674647 , version 1 (21-08-2024)

Licence

Identifiants

Citer

C Martinsons, N Picard. Untangling light in noisy luminous environments. Lighting research and technology, 2024, ⟨10.1177/14771535241266178⟩. ⟨hal-04674647⟩

Collections

CSTB
15 Consultations
0 Téléchargements

Altmetric

Partager

More