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Proceedings Paper

Radiation From Partially Coherent Sources
Author(s): Ari T. Friberg
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Paper Abstract

Although the theory of partial coherence was formulated in a reasonably general form about a quarter of a century ago, it was not until a few years ago that this theory was begun to be applied to problems of radiation from partially coherent sources. In this review article the properties of the radiant intensity generated by a planar source of any state of coherence will be discussed. It will be first recalled that the radiant intensity can be expressed as a two-dimensional spatial Fourier transform of a correlation function of the field in the source plane, averaged over the source area. The characteristics of the radiation from several model sources will then be analyzed. With, the help of these results certain equivalence theorems relating to the radiant intensity from planar sources of entirely different degrees of spatial coherence will be reviewed and the underlying physical principles will be elucidated. A number of illustrative examples will also be given. Finally some very recent work, which has led to the construction of planar sources with controllable degrees of spatial coherence, will be described. Experiments carried out with these sources will be discussed; they verify the main relationships between the coherence properties of the source and the directionality of the light it generates.

Paper Details

Date Published: 25 October 1979
PDF: 15 pages
Proc. SPIE 0194, Applications of Optical Coherence, (25 October 1979); doi: 10.1117/12.957909
Show Author Affiliations
Ari T. Friberg, University of Rochester (United States)

Published in SPIE Proceedings Vol. 0194:
Applications of Optical Coherence
William H. Carter, Editor(s)

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