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https://www.nist.gov/people/howard-w-yoon
Howard W. Yoon (Fed)
Supervisory Physicist
Advancing spectroradiometry for improvements in fundamental and disseminated standards for spectral power responsivity, spectral radiance, spectral irradiance, radiance temperature, and solar energy.
Activities
U.S. expert on non-contact thermometry to the Consultative Committee for Thermometry
Since the establishment of the International Temperature Scale of 1190 (ITS-90), much progress has been made in the development of radiometers and blackbody
Eric Norrgard, Catherine Cooksey, Stephen Eckel, Nickolas Pilgram, Kayla Rodriguez, Howard W. Yoon, Yuly Andrea Chamorro Mena, Lukáš Pašteka, Anastasia Borschevsky
Here we report measured and calculated values of radiative decay rates and vibrational branching fractions for the A$^2\Pi$ state of MgF. The decay rate
Christopher W. Meyer, Kathryn Miller, Weston L. Tew, Howard W. Yoon
The 10th International Temperature Symposium (ITS10) was held in Anaheim California on April 3rd to 7th, 2023. More than 180 abstracts were received and
Adam L. Pintar, Zachary H. Levine, Howard W. Yoon, Stephen Maxwell
A technique for characterizing and correcting the linearity of radiometric instruments is known by the names the 'flux-addition method' and the 'combinatorial
Improvements in a lamp-monochromator-based facility at the National Institute of Standards and Technology (NIST), the Visible near-infrared Spectral Comparator
Ping-Shine Shaw, John T. Woodward IV, B. Carol Johnson, Steven W. Brown, Howard W. Yoon
The stability of a spectrograph is a one of the most important characteristics affecting the spectrograph's radiometric performance. For many applications such
A self-referenced ambient radiation thermometer determines a temperature of a blackbody object and includes a temperature stabilized detector; a detector lens; a Lyot stop; a collimating lens; a field stop; an optical chopper such that the central radiation received by the temperature stabilized
In this work, we describe the construction and characterization of an Ambient-Radiation Thermometer (ART) which can measure non-contact temperatures from -50 deg C to 150 deg C. To increase the long-term stability of the responsivity, optical components within the field-of-view of the detector and