Download PDF by H. M. A. El-Sum (auth.), A. F. Metherell, H. M. A. El-Sum,: Acoustical Holography: Volume 1 Proceedings of the First

By H. M. A. El-Sum (auth.), A. F. Metherell, H. M. A. El-Sum, Lewis Larmore (eds.)

ISBN-10: 1461582040

ISBN-13: 9781461582045

ISBN-10: 1461582067

ISBN-13: 9781461582069

Only an area drawback of one hundred fifteen seats avoided this primary foreign Symposium on Acoustical Holography from having an attendance of over 250. regrettably, the dimensions of the auditorium of the Douglas complicated study Laboratories required that attendance be by way of invitation in basic terms, and plenty of deserving and scientists couldn't be current. This quantity offers the court cases of the symposium, and with a bit of luck may also help compen­ sate these people who have been not able to wait. The symposium itself consisted of 16 formal papers. The seven­ teenth, via Dr. P. Greguss, used to be now not bought in time to be learn yet is incorporated in those lawsuits. The presence of Professor Dennis Gabor significantly improved the casual classes, which often turned as lively as one may well anticipate in a brand new box. Dr. H. M. A. El-Sum, a specialist to the Douglas complex study Laboratories and a pioneer within the box of holography, set the degree with the 1st paper. He supplied a common advent to the actual ideas and functional equipment concerned about optical and acoustical holography. His paper additionally integrated a precis of assorted particular innovations at the moment utilized in sound holography, with the benefits, negative aspects, and obstacles concerned for every approach.

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Angew. Physik 7:213-218 (1955). J. L. Fergason, Sci. Am. 211 :76 (August 1964). W. E. Woodmansee, Materials Evaluation 24: 564-572 (1966). W. E. Woodmansee and H. L. Southworth, Thermal Nondestructive Testing With Cholesteric Liquid Crystals, in: Fifth International Conference on Nondestructive Testing, Montreal, Canada, May 1967, to be published. M. Leistner and L. Herforth, Naturwissenschaften 44:59 (1957). P. Jarman, J. Acoust. Soc. Am. 32: 1459-1462 (1960). H. Schreiber and W. Degner, Naturwissenschaften 37: 358-359 (1950).

Kimball, J. Opt. Soc. Am. 58:609-614(1968). 5. E. N. Leith and 1. Upatnieks, J. Opt. Sci. Am. 52:1123-1130 (1962); 53:1377 (1963). 6. D. Gabor, Proc. Roy. Soc. (London) A197:454-487 (1949); Proc. Phys. Soc. 864:449-469 (1951). 7. H. M. A. D. Thesis, Stanford University (1952). 8. P. Kirkpatrick and H. M. A. El-Sum, J. Opt. Soc. , 46:825-831 (1956). 9. G. L. Rogers, Proc. Roy. Soc. (Edinburgh) A63: 193-221 (1952). 10. R. W. Meier, J. Opt. Soc. Am. 55:987-992 (1965). 11. E. N. Leith, J. Upatnieks, and K.

On the other hand, laser beam scanning combines fast scanning with the high acoustic frequencies. There are two main methods for utilizing a laser beam to record the ripples on a liquid or a solid surface on which acoustic wa ves impinge. The two methods vary mainly in the deflecting schemes of the laser beam. One method proposed by Gabor 6 ) is to use mechanical deflection of the beam to detect the frequency modulation imposed on a sampling laser beam as it is reflected from a thin membrane in the sound field.

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Acoustical Holography: Volume 1 Proceedings of the First International Symposium on Acoustical Holography, held at the Douglas Advanced Research Laboratories, Huntington Beach, California December 14–15, 1967 by H. M. A. El-Sum (auth.), A. F. Metherell, H. M. A. El-Sum, Lewis Larmore (eds.)


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