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Opt Lett. 2004 Apr 1;29(7):667-9.

Influence of longitudinal spatial coherence on the signal of a scanning interferometer.

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  • 1Department of Optics, Saratov State University, 155 Moskovskaya Ulitsa, Saratov 410026, Russia.


The physical conditions for observing the longitudinal spatial coherence of light of an extended thermal source in interference experiments are defined. For experimental verification of these conditions a Michelson interferometer with a longitudinal scanning mirror was used. The influence of the longitudinal spatial coherence of thermal light on a fringe envelope is demonstrated experimentally.

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