Modelling and Thermographic Measurements of LED Optical Power
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 i...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/5/1471 |
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| author | Maria Strąkowska Sebastian Urbaś Mariusz Felczak Błażej Torzyk Iyad S. M. Shatarah Rafał Kasikowski Przemysław Tabaka Bogusław Więcek |
| author_facet | Maria Strąkowska Sebastian Urbaś Mariusz Felczak Błażej Torzyk Iyad S. M. Shatarah Rafał Kasikowski Przemysław Tabaka Bogusław Więcek |
| author_sort | Maria Strąkowska |
| collection | DOAJ |
| description | 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<sub>th</sub>) and a 3D-FEM analysis were performed to confirm the experimental results. |
| first_indexed | 2024-04-25T00:20:39Z |
| format | Article |
| id | doaj.art-f9777ab26c9548a882213edfa672c64e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-25T00:20:39Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f9777ab26c9548a882213edfa672c64e2024-03-12T16:54:53ZengMDPI AGSensors1424-82202024-02-01245147110.3390/s24051471Modelling and Thermographic Measurements of LED Optical PowerMaria Strąkowska0Sebastian Urbaś1Mariusz Felczak2Błażej Torzyk3Iyad S. M. Shatarah4Rafał Kasikowski5Przemysław Tabaka6Bogusław Więcek7Institute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electrical Power Engineering, Lodz University of Technology, 90-924 Lodz, PolandInstitute of Electronics, Lodz University of Technology, 90-924 Lodz, PolandThis 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<sub>th</sub>) and a 3D-FEM analysis were performed to confirm the experimental results.https://www.mdpi.com/1424-8220/24/5/1471IR thermographyLEDoptical powerthermal modelling |
| spellingShingle | Maria Strąkowska Sebastian Urbaś Mariusz Felczak Błażej Torzyk Iyad S. M. Shatarah Rafał Kasikowski Przemysław Tabaka Bogusław Więcek Modelling and Thermographic Measurements of LED Optical Power Sensors IR thermography LED optical power thermal modelling |
| title | Modelling and Thermographic Measurements of LED Optical Power |
| title_full | Modelling and Thermographic Measurements of LED Optical Power |
| title_fullStr | Modelling and Thermographic Measurements of LED Optical Power |
| title_full_unstemmed | Modelling and Thermographic Measurements of LED Optical Power |
| title_short | Modelling and Thermographic Measurements of LED Optical Power |
| title_sort | modelling and thermographic measurements of led optical power |
| topic | IR thermography LED optical power thermal modelling |
| url | https://www.mdpi.com/1424-8220/24/5/1471 |
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