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A convex triangular obstacle forms a vital part of a periodic echelletegrating. A triangular grating is characterized by three parameters like period,depth and flare angle. Knowledge of groove field is essential for precisedesigning of triangular corrugated structures for studying the blazing effectof propagating EM wave. In the present paper, an attempt has been made todetermine the power of Groove fields belonging to a pair of groove regionsadjacent to a convex triangular prism. Groove fields and their associatedpowers based on Dirichlet conditions on the groove surfaces have beendetermined. The governing Helmholtz wave equation has been solved fordetermining the free surface field and the groove field. Fourier-Bessel series,oblique coordinate transformations and Lommel's integral are used as tools.

Determination of Power of Groove fields belonging to the wedge regions  adjacent to a convex triangular obstacle associated with Dirichlet conditions  subject to axially independent EM fields