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Abstract

Infrared active thermography provides subsurface details of the test object depending on the thermal inhomogeneity of the constituent material. Effective analysis of various defects existing at different depths in realistic objects demands novel processing approaches to enhance detectability and excitations facilitating depth analysis with constituent band of frequencies. This contribution is intended to exhibit the depth analysis provided by recently introduced phase modulated coded stimulation for infrared imaging validated with glass fiber reinforced plastic plate with embedded Teflon inserts. Experimental results exhibited the enhanced defect detectability using the accumulated energy in pulse compression over that of the distributed energy in the existing phase analysis.