A spectrally adjustable radiance source based on light-emitting diodes (LEDs) has been constructed for spectral responsivity measurements of radiance and luminance meters. A 300 mm integrating sphere source with adjustable output port is illuminated using 30 thermally stabilized narrow-band LEDs covering the visible wavelength range of 380–780 nm. The functionality of the measurement setup is demonstrated by measuring the relative spectral responsivities of a luminance meter and a photometer head with cosine-corrected input optics.
- quantum optics
Hirvonen, J-M., Poikonen, T., Vaskuri, A., Kärhä, P., & Ikonen, E. (2013). Spectrally adjustable quasi-monochromatic radiance source based on LEDs and its application for measuring spectral responsivity of a luminance meter. Measurement Science and Technology, 24(11), . https://doi.org/10.1088/0957-0233/24/11/115201