Radiometry forms the first half of Boyd's treatise. Unlike photometry, which scales light measurements according to the human eye's sensitivity, radiometry deals with absolute physical quantities of energy.
Defines the spectral radiance of a blackbody as a function of temperature and wavelength. radiometry and the detection of optical radiation boyd pdf
): Total power emitted or received per unit time, measured in Watts (W). Radiant Intensity ( Radiometry forms the first half of Boyd's treatise
The input radiant power required to produce a signal-to-noise ratio (SNR) of unity. Lower NEP indicates a more sensitive detector. Specific Detectivity ( D*cap D raised to the * power radiometry and the detection of optical radiation boyd pdf