PROPAGATION INVARIANCE AND SELF-IMAGING IN VARIABLE-COHERENCE OPTICS

被引:139
作者
TURUNEN, J
VASARA, A
FRIBERG, AT
机构
[1] Department of Technical Physics, Helsinki University of Technology, Espoo
来源
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 1991年 / 8卷 / 02期
关键词
D O I
10.1364/JOSAA.8.000282
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The concept of propagation invariance in partially coherent optics is introduced. Explicit expressions are given for the cross-spectral density and the angular correlation function (cross-angular spectrum) characterizing a class of fields that are propagation invariant in the sense that their correlation properties in the space-frequency domain are exactly the same in every transverse plane. The so-called diffraction-free beams are shown to be members of this new, wider class of wave fields, which itself is a subset of a generalized class of partially coherent self-imaging fields. The existence of partially coherent propagation-invariant fields with a sharp correlation peak is verified experimentally by considering radiation from a planar J(o) Bessel-correlated source.
引用
收藏
页码:282 / 289
页数:8
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