= Yuqin Zong
{c}
<Yuqin Zong> coauthored NIST calibration methods connecting optical detector output with reproducible quantities in <photometry>. A <photometer>'s <wavelength> response and the test source's spectrum determine corrections needed to infer <illuminance>. Repeated reference measurements, background subtraction and controlled geometry help separate a changing <light> source from detector drift. The work turns a visual-response-weighted quantity into a transferable physical measurement scale.<NIST Measurement Services: Photometric Calibrations by Yuqin Zong and others>[sections 3.2–3.5.6, detector systems, spectral corrections and calibration procedures]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/LED_Standands.jpg?width=260]
{title=<Yuqin Zong> testing a high-power LED}
{description=National Institute of Standards and Technology c/o: B. Young. Public domain in the United States: U.S. federal employee work (NIST), as stated on the Commons file page. https://commons.wikimedia.org/wiki/File:LED_Standands.jpg#Licensing[Source usage terms], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:LED_Standands.jpg}
{width=260}
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