1998 Volume 82 Issue 2 Pages 97-104
The wavefront synthesizing method was used to analyze the real physical phenomena of a laser beam scattering in fog. The analyses were performed by steady state in the standing waves. The wavefront synthesizing method is simple, and the calculation time and accuracy do not depend on the size or number of particles being analyzed, so it is possible to analyze stably.
Using this method, the intensity distributions and phase distributions inside and outside a single fog particle are obtained.
The analysis results were comparable to ones calculated by Mie theory with a long distance.
We also extended this analysis to many particles of different sizes in a fog space. For a fog space, the bold approximation was applied. This approximation method was validated by comparing the water content of natural fog. The analyzed results compared well with experimental results for the intensity distribution of a scattering beam.
This study could quantitatively evaluate the propagation of a laser beam in fog, and it also proved the appropriateness of the proposed laser radar equation for real weather conditions, considering the divergence of the transmitting laser beam.
