title: Fraunhofer Diffraction Effects on Total Power for a Planckian Source.
abstract: An algorithm for computing diffraction effects on total power in the case of Fraunhofer diffraction by a circular lens or aperture is derived. The result for Fraunhofer diffraction of monochromatic radiation is well known, and this work reports the result for radiation from a Planckian source. The result obtained is valid at all temperatures.
authors: National Institute of Standards and Technology, Gaithersburg, MD 20899-8441.
authors: E L
authors: EL
authors: Shirley
keywords: Fraunhofer; Planckian; diffraction; power; radiometry