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Optical performance characterization of light-logging actigraphy dosimeters.

Luke L A Price, Andrey Lyachev, Marina Khazova

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |April 5, 2017
    PubMed
    Summary
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    New research compares wearable light-logging dosimeters for sleep and circadian rhythm studies. Performance evaluations guide researchers in selecting accurate devices for human physiological response measurements.

    Area of Science:

    • Chronobiology
    • Wearable technology
    • Photobiology

    Background:

    • Wearable devices are common for sleep, circadian rhythm, and light level research.
    • Evolving recommendations on human physiological responses to light necessitate updated measurement demands.
    • Existing light-logging dosimeters may not meet new performance standards.

    Purpose of the Study:

    • To evaluate the performance of commercially available light-logging dosimeters.
    • To compare the optical performance of 11 devices from eight manufacturers.
    • To propose a standard for assessing the optical performance of light measurement devices.

    Main Methods:

    • Tested seven light-logging actigraphy dosimeter models wearable as badges.
    • Evaluated directional and spectral sensitivities, linearity, dynamic range, and resolution.

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  • Compared findings with existing published data.

    • Main Results:

    • Performance metrics varied significantly across the tested light-logging dosimeter models.
    • Seven models underwent detailed optical performance testing.
    • Data from 11 devices were compiled and compared.

    Conclusions:

    • The study highlights variability in light-logging dosimeter performance.
    • A proposed standard for optical performance assessment is presented.
    • Researchers are guided in selecting appropriate devices for accurate light exposure monitoring.