Role of caustics in the formation of networks of amplitude zeros for partially developed speckle fields.
The topology of a partially developed speckle field was studied by use of interference techniques through computer simulation. Amplitude and phase structures in the vicinity of caustics for a coherent radiation field scattered at a surface with large inhomogeneities were investigated. It was confirmed that the caustics are indispensible components of the procedure for the formation of networks of amplitude zeros for a coherent field scattered by a rough surface with large inhomogeneities. It is shown that the formation of interference forklets in the field gives evidence of changes in the field's topology, as these forklets are a diagnostic sign of transition from a caustic to a three-dimensional pattern of a diffraction catastrophe.
Angelsky
Oleg V
OV
Department of Correlation Optics, Chernivtsi University, Chernivtsi 58012, Ukraine. oleg@optical.chernovtsy.ua
Maksimyak
Peter P
PP
Maksimyak
Alexander P
AP
Hanson
Steen G
SG
Ushenko
Yuriy A
YA
D000465:Algorithms; D003198:Computer Simulation; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007368:Interferometry / Q000379:methods*; D015233:Models, Statistical