= Thomas C. Larason
{c}
A researcher in optical measurement whose work with <Jeanne M. Houston> establishes detector <spectral responsivity>. A detector’s electrical signal is compared with a calibrated reference while the illumination wavelength is varied; subtracting <dark current> and monitoring source changes separates optical response from instrumental offsets. The resulting calibration converts a measured current into optical power, with an explicit dependence on wavelength rather than a single sensitivity number.<Spectroradiometric Detector Measurements: Ultraviolet, Visible, and Near-Infrared Detectors for Spectral Power by Thomas C. Larason and others>[§§3.2, 4.2 and 7.2: detector-comparison apparatus, spectral readout and measurement controls]{ref}
\Image[https://www.nist.gov/sites/default/files/styles/480_x_480_limit/public/userphotos/larason_2.jpg?itok=dyDJuhLE]
{title=Portrait of <Thomas C. Larason>}
{source=https://www.nist.gov/people/thomas-c-larason}
{width=240}
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