Matthias Lindemann

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About

Matthias Lindemann is a leading metrologist specializing in photometry and radiometry, with a core focus on high-precision light measurement techniques. His major contributions center on advancing goniophotometry—the method for measuring the total luminous flux of light sources by integrating their spatial radiance distributions. At the Physikalisch-Technische Bundesanstalt (PTB), Germany's national metrology institute, Lindemann pioneered the development of robot-based goniophotometers, which automate the complex, full-sphere measurements needed to characterize modern lighting, including LEDs and solid-state lamps. His most-cited work, "Robot goniophotometry at PTB" (2015, 13 citations), details this innovative system, enabling unprecedented accuracy in total flux determination by capturing spectral radiance distributions weighted by the photopic observer across all surface and solid-angle components. Additionally, his 2009 study on stray light determination at PTB's facility (3 citations) addresses a critical source of error in these measurements, enhancing the reliability of photometric standards. Lindemann's research underpins international lighting calibration protocols, directly impacting energy efficiency assessments and quality control in the lighting industry. His work exemplifies the meticulous engineering required to maintain global measurement traceability, making him a key figure in optical metrology.