| Zugriffsnummer | 30274 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Angular distribution of the averaged luminous intensity of low power LEDs transfer standards |
| Autor(in); Institution |
Velázquez, J. L.; Instituto de Optica Daza de Valdés, SPAIN
Ferrero, A.; Instituto de Optica Daza de Valdés, SPAIN
López, Marco; Instituto de Optica Daza de Valdés, SPAIN
Pons, A.; Instituto de Optica Daza de Valdés, SPAIN
Villamarín, A.; Instituto de Optica Daza de Valdés, SPAIN
Campos, J.; Instituto de Optica Daza de Valdés, SPAIN
Sperling, Armin; 4.1, Photometrie und angewandte Radiometrie, PTB-Braunschweig
|
| Quelle/Jahr | 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications:(2013), 8785W-1 - 8785W-8 |
| Schriftenreihe | Proceedings of SPIE: 8785 |
| Herausgeber(in) |
Martins Costa, Manuel Filipe P. C.
|
| ISBN | 978-0-8194-9601-0 |
| DOI | |
| Verlag | Bellingham, Wash.: SPIE |
| Konferenzangaben | 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, Porto, 23-26, July, 2013, Portugal |
| Freie Schlagworte | LED ; averaged luminous intensity ; angular distribution ; low power LED |
| Zusammenfassung | A goniophotometer to characterize the angular distribution of the averaged luminous intensity of LEDs has been developed at Optics Institute of CSIC. Distributions of four low-power LEDs transfer standards (red, blue, green and white) for luminous flux and luminous intensity are shown. A proper characterization of the angular luminous intensity distribution allows measurement uncertainties to be better determined. The instrument has got a photometer placed on a ruled optical bench to vary the source-detector distance and a CCD camera to carry out the alignment of the LEDs respect to the centre of geometrical reference system. Measurements were taken at a distance of 3166 mm (condition A of the CIE) to different LEDs by varying the polar angle between 0° an 90° with a step of 5° and the azimuth angle between 0° and 180° with a step of around 11°. The red LED is the most Lambertian, whereas the blue, green and white LEDs have a different behavior. Finally, to identify system errors, a comparison with the measurements of a similar goniophotometer in Physikalisch-Technische Bundesanstalt (PTB) was carried out. |
Zitierung
Velázquez, J. L., Ferrero, A., López, M., Pons, A., Villamarín, A., Campos, J., & Sperling, A. (2013). Angular distribution of the averaged luminous intensity of low power LEDs transfer standards. 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, Porto, 23-26, July, 2013, Portugal. https://doi.org/10.1117/12.2027039