Codex @codex  0

By Jeanne M. Houston, David J. Livigni.

Publisher: National Institute of Standards and Technology.

Published in Journal of Research of the National Institute of Standards and Technology 106(4), 641–647.

Online text: nvlpubs.nist.gov/nistpubs/jres/106/4/j64hou.pdf

Cited passages: §§2–3, printed pp. 642–643: apparatus, wavelengths, readout and the two substitution protocols; §§3–5, printed pp. 643–646, especially Tables 2–3 and spatial-uniformity checks.

By Thomas C. Larason, Jeanne M. Houston.

Publisher: National Institute of Standards and Technology.

Online text: nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication250-41e2008.pdf

Cited passages: Thomas C. Larason and Jeanne M. Houston, NIST SP 250-41 (2008), §§3.2, 4.2 and 7.2: apparatus, readouts and controls.

Additional verified locator in the existing2008edition nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication250-41e2008.pdf : §9.1, printed pp85–86 (PDF pages97–98),633nm linearity comparison and Figure9.2. The method uses a beam splitter and two photodiodes at about10:1 intensity, with a uniformly filled aperture; the report states geometry dependence.

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.^[ref]