The metrological fields of photometry and radiometry and their associated units are closely
linked through the current definition of the base unit of luminous intensity—the candela …

Photometry contributes to our understanding how the world is perceived by the human
visual system, where a specific example is an early study of photographic plates. Nowadays …

Bringing together the contributions of eleven leading photometric experts, this practical
reference guide presents common design formulas, essential rules-of-thumb, worked-out …

The design and construction of a predictable quantum efficient detector (PQED), suggested
to be capable of measuring optical power with a relative uncertainty of 1 ppm (ppm= parts …

A detector-based spectral irradiance scale has been realized at the National Institute of
Standards and Technology (NIST). Unlike the previous NIST spectral irradiance scales, the …

The precision blackbody sources developed at the All-Russian Institute for Optical and
Physical Measurements (Moscow, Russia) and their characteristics are analyzed. The …

Twin-photon techniques for photo-detector calibration Page 1 Laser Physics Letters Twin-photon
techniques for photo-detector calibration To cite this article: G Brida et al 2006 Laser Phys. Lett. 3 …

The paper reviews some of the advances in optical radiation measurements made over the
last twenty years, particularly through the use of cryogenic radiometers and solid-state …

Abstract The Physikalisch-Technische Bundesanstalt (PTB) has developed a spectral
comparator facility for accurate spectral radiance measurements. As a primary standard …

The inter-instrument, inter-laboratory, and long-term comparability of fluorescence data
requires the correction of the measured emission and excitation spectra for the wavelength …