Study on determining the photometric parameters for a white LED using a light meter

Alina E. Marcu; Robert A. Dobre; Marian Vlădescu

doi:10.1117/12.2244505

14 December 2016 Study on determining the photometric parameters for a white LED using a light meter

Alina E. Marcu, Robert A. Dobre, Marian Vlădescu

Proceedings Volume 10010, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VIII; 1001018 (2016) https://doi.org/10.1117/12.2244505
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2016, 2016, Constanta, Romania

Abstract

The paper presents the experiments performed in order to determine the most suitable measuring mode which could be used to notably increase the accuracy of the photometric parameters determination for a white LED using a light meter with multiple measurement modes for various classic light sources like tungsten (incandescent), fluorescent, mercury and sodium based. Light meters are used for measuring the illuminance, which is a photometric parameter and its determination is based on the properties of human sight sense. Knowing how the sensitivity of the eye varies with the wavelength, the spectral response of the sensor and the spectral composition of the radiation emitted by a certain light source, a correction curve can be applied over the sensed values and obtain an accurate measurement. Nowadays many light meters can contain multiple calibration curves for typical light sources, but not for LEDs, especially for white ones. Since multiple measurements can be done using each correction curve, the authors conducted experiments to determine how to combine the aforementioned results to obtain a good estimate for the illuminance of white LEDs.

Citation Download Citation

Alina E. Marcu, Robert A. Dobre, and Marian Vlădescu "Study on determining the photometric parameters for a white LED using a light meter", Proc. SPIE 10010, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VIII, 1001018 (14 December 2016); https://doi.org/10.1117/12.2244505

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