Electric current heating calibration of a laser holographic nondestructive test systemHolographic NDT was used to measure small surface displacements controlled by electric heating by detecting the difference of the interference fringe patterns as viewed through the hologram on a real time basis. A perforated aluminum test plate, with the holes used to position thin metal foils, was used in the experiment. One of the foils was connected to an electric power source and small displacements of the foil were caused and controlled by Ohmic heating. An He-Ne laser was used to perform the holography.
Document ID
19760039664
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Liu, H.-K. (Alabama, University University, Ala., United States)
Kurtz, R. L. (NASA Marshall Space Flight Center Space Sciences Laboratories, Huntsville, Ala., United States)