Injection Locked Lasers as Surface Displacement Sensors
In an age where engineered materials are becoming common place in the competitive world market, the manufacturer using engineered materials can not afford to waste material in the manufacturing process. The quality control techniques must become real time and on-line to reduce material waste and to reject unacceptable components before complex processing is performed on them. Once the quality control techniques become real time and on-line, the techniques can be incorporated into a feedback loop. The feedback loop can then be used to monitor and adjust the relevant parameters during the manufacturing process to assure component compliance to the desired specifications. To help usher in the era of “smart” manufacturing processes, new reliable and non-contacting NDE systems must be developed.
KeywordsModulation Index Laser Cavity Displacement Sensor Aluminum Block Interferometric Fringe
Unable to display preview. Download preview PDF.
- 3.Schumacher, N. A. and Burger, C. P., “An Experimental Calibration of a Fiber Optic Interferometer for Displacements in the Nanometer Range,” Proceedings, 1991 SEM Spring Conference on Experimental Mechanics, Milwaukee, WI, 158-162 (1991).Google Scholar
- 4.Smith, J. A., Burger C. P., “Digital Phase Demodulation in Heterodyne Interferometry,” 21 rst Review of Progress in Quantitative Nondestructive Evaluation, July 1994, Plenum Press, New York, NY, Vol. 21, 1995.Google Scholar
- 6.Siegman, E., Lasers, University Science Books, Mill Valley, Ca, 1986.Google Scholar