Spectrally Adjustable Radiance Source

Juha-Matti Hirvonen

    Research output: ThesisLicenciate's thesis


    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.
    Original languageEnglish
    QualificationLicentiate's degree
    Awarding Institution
    • Aalto University
    • Ikonen, Erkki, Supervising Professor
    • Kärhä, Petri, Thesis Advisor
    Publication statusPublished - 2013
    MoE publication typeG3 Licentiate thesis


    • LED
    • Radiance source
    • Spectral responsivity
    • Photometry


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