On the Radiation Efficiency of Quasi-Homogeneous Sources of Different Degrees of Spatial Coherence

  • E. Wolf
  • W. H. Carter
Conference paper


Recent researches on the foundation of radiometry [1,2] have made it possible to provide answers to a number of puzzling questions relating to radiation from sources of different states of coherence. In particular, a relationship between the coherence properties of a source and the directionality of the light that the source generates has been established [3,4] at least for a wide class of sources of practical interest, and the coherence properties of Lambertian sources have been clarified [5] to a large extent.


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    The quantity I(r) = W(r,r) represents what is traditionally known in physical optics as simply the intensity. [The rather inappropriate term ‘irradiance’, which indicates a confusion between radiometry and physical optics, has also been frequently employed in recent literature]. Throughout this paper we refer to I(r), as the optical intensity to distinguish it clearly from the radiometric concept of radiant intensity that we denote by J(s).Google Scholar
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Copyright information

© Springer Science+Business Media New York 1978

Authors and Affiliations

  • E. Wolf
    • 1
  • W. H. Carter
    • 2
  1. 1.University of RochesterRochesterUSA
  2. 2.Naval Research LaboratoryUSA

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