Photometry, radiometry and 'the candela': evolution in the classical and quantum world
… The number of photons of all wavelengths emitted or contained in a given beam of light is
the photon number, NP, and is determined from the spectral concentration of the radiant …
the photon number, NP, and is determined from the spectral concentration of the radiant …
A cryogenic radiometer for absolute radiometric measurements
JE Martin, NP Fox, PJ Key - Metrologia, 1985 - iopscience.iop.org
The adoption in 1979 of a new definition of the candela, which permitted a detector-based
approach to the realization of the unit, has emphasized the importance of high-accuracy …
approach to the realization of the unit, has emphasized the importance of high-accuracy …
RadCalNet: A radiometric calibration network for Earth observing imagers operating in the visible to shortwave infrared spectral range
…, B Berthelot, A Bialek, J Czapla-Myers, NP Fox… - Remote Sensing, 2019 - mdpi.com
Vicarious calibration approaches using in situ measurements saw first use in the early 1980s
and have since improved to keep pace with the evolution of the radiometric requirements of …
and have since improved to keep pace with the evolution of the radiometric requirements of …
The quantum candela: a re-definition of the standard units for optical radiation
…, CJ Chunnilall, ER Woolliams, NP Fox… - Journal of Modern …, 2007 - Taylor & Francis
The candela, the SI (système internationale) unit for optical radiation, has been one of the
base units since the inception of the system. The latest definition was in 1979, when it was …
base units since the inception of the system. The latest definition was in 1979, when it was …
Absolute linearity measurements on HgCdTe detectors in the infrared region
E Theocharous, J Ishii, NP Fox - Applied Optics, 2004 - opg.optica.org
The nonlinearity characteristics of photoconductive and photovoltaic HgCdTe detectors
were experimentally investigated in the infrared wavelength region by use of the National …
were experimentally investigated in the infrared wavelength region by use of the National …
Speaker-normalized sound representations in the human auditory cortex
The acoustic dimensions that distinguish speech sounds (like the vowel differences in “boot”
and “boat”) also differentiate speakers’ voices. Therefore, listeners must normalize across …
and “boat”) also differentiate speakers’ voices. Therefore, listeners must normalize across …
Highly stable, monochromatic and tunable optical radiation source and its application to high accuracy spectrophotometry
VE Anderson, NP Fox, DH Nettleton - Applied Optics, 1992 - opg.optica.org
An optical radiation source has been developed by coupling a dye laser to a small integrating
sphere with an optical fiber. The radiant power from this source, which is monochromatic …
sphere with an optical fiber. The radiant power from this source, which is monochromatic …
CEOS comparison of IR brightness temperature measurements in support of satellite validation. Part I: Laboratory and Ocean surface temperature comparison of …
E Theocharous, E Usadi, NP Fox - 2010 - eprintspublications.npl.co.uk
A comparison of terrestrial based Infrared (IR) radiometric instrumentation used to support
calibration and validation of satellite borne sensors with emphasis on Sea/water surface …
calibration and validation of satellite borne sensors with emphasis on Sea/water surface …
The characterization of a high-temperature black body as the basis for the NPL spectral-irradiance scale
M White, NP Fox, VE Ralph, NJ Harrison - Metrologia, 1995 - iopscience.iop.org
PubTeX output 1998.03.04:1441 Page 1 Metrologia The characterization of a high-temperature
black body as the basis for the NPL spectral-irradiance scale To cite this article: M White …
black body as the basis for the NPL spectral-irradiance scale To cite this article: M White …