Krishnendu Chatterjee

TL;DR: Pulsed, lock-in and frequency modulated thermography are three alternative nondestructive evaluation techniques. as discussed by the authors compared the defect imaging performance of these techniques using: matched excitation energy; the same carbon fiber composite test piece and infrared camera system.

TL;DR: An image reconstruction algorithm that enables LI thermography tests in the transient regime and removes temperature gradients due to nonuniform heating and surface emissivity variation is proposed.

TL;DR: In this article, high power light emitting diode (LED) arrays have been investigated as excitation sources for long pulse and lock-in thermography, and they were found to emit some IR radiation, although far less than conventional incandescent light sources.

TL;DR: In this article, a study of blind frequency using electro-thermal model based numerical simulation on a piece of thermally anisotropic carbon fiber composite is presented, where the effect of paint layer, which is often applied to the sample surface for better thermal imaging is incorporated in the simulation.

TL;DR: In this paper, the authors proposed a novel pulse compression algorithm, in the context of frequency modulated thermal wave imaging, derived from a predefined reference pixel in a recorded video, which contains direct measurement of the excitation signal alongside the thermal image of a test piece.