Back to Search Start Over

Modelling and Thermographic Measurements of LED Optical Power.

Modelling and Thermographic Measurements of LED Optical Power.

Authors :
Strąkowska M
Urbaś S
Felczak M
Torzyk B
Shatarah ISM
Kasikowski R
Tabaka P
Więcek B
Source :
Sensors (Basel, Switzerland) [Sensors (Basel)] 2024 Feb 24; Vol. 24 (5). Date of Electronic Publication: 2024 Feb 24.
Publication Year :
2024

Abstract

This paper presents a simple engineering method for evaluating the optical power emitted by light-emitting diodes (LEDs) using infrared thermography. The method is based on the simultaneous measurement of the electrical power and temperature of an LED and a heat source (resistor) that are enclosed in the same plastic packaging under the same cooling conditions. This ensures the calculation of the optical power emitted by the LED regardless of the value of the heat transfer coefficient. The obtained result was confirmed by comparing it with the standard direct measurement method using an integrated sphere. The values of the estimated optical power using the proposed method and the integrated sphere equipped with a spectrometer were consistent with each other. The tested LED exhibited a high optical energy efficiency, reaching approximately η ≈ 30%. In addition, an uncertainty analysis of the obtained results was performed. Compact modelling based on a thermal resistor network (R <subscript>th</subscript> ) and a 3D-FEM analysis were performed to confirm the experimental results.

Details

Language :
English
ISSN :
1424-8220
Volume :
24
Issue :
5
Database :
MEDLINE
Journal :
Sensors (Basel, Switzerland)
Publication Type :
Academic Journal
Accession number :
38475006
Full Text :
https://doi.org/10.3390/s24051471