Aspects of Practical Radiometry: Terminology, Uncertainty, and Physical Optics
Eric L. Shirley, Raju V. Datla
We discuss efforts that have been made to help establish-in practice-a greater uniformity of nomenclature used for various terms in radiometry as well as expression of measurement uncertainty. We also discuss the role of diffraction effects, which account for the influence on radiometric measurements resulting from differences between geometrical optics (the traditional, idealized mathematical model for radiometric measurements), and physical optics that considers the wave nature of electromagnetic radiation. We discuss the nature of corrections for diffraction effects and the impact of diffraction effects on measurement uncertainty. Some examples of diffraction effects in practical radiometry are noted.