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Caustic patterns associated with melt zones in solidified glass samples — part II: Asymmetric cases

Two types of geometrical asymmetries have been analyzed numerically to determine their influence on the externally visible caustic patterns from a drawdown zone. The first of these asymmetries involved axial displacement of identical opposing profiles of the drawdown zone, while the second involved opposing profiles of differing slope positioned with their inflection points in axial alignment. The results of these studies are presented graphically as an aid to interpreting the asymmetries of actual caustic patterns generated by illuminating real drawdown zone samples in optical fiber drawing.