抄録
This paper describes the peak shift in a Gaussian-like spectrum caused by the effects of spatial coherence and dispersive diffraction. The peak shift depends greatly on the ratio of the coherence area A
c produced by a primary incoherent source to the area πρ
2 of a circular aperture in the secondary source plane. The measured results are in reasonably good agreement with the numerical computational results. The peak shift is caused by a mixture of spatial coherence and dispersive diffraction in the region 0<A
c/πρ
2<1. In the coherent limit A
c/πρ
2→∞, dispersive diffraction is most dominant and results in the maximum peak shift, whereas in the incoherent limit A
c/πρ
2~0 no spectral change takes place.
