By H. M. A. El-Sum (auth.), A. F. Metherell, H. M. A. El-Sum, Lewis Larmore (eds.)
Only an area predicament of one hundred fifteen seats avoided this primary overseas Symposium on Acoustical Holography from having an attendance of over 250. regrettably, the scale of the auditorium of the Douglas complicated examine Laboratories required that attendance be by way of invitation simply, and plenty of deserving and scientists couldn't be current. This quantity provides the complaints of the symposium, and with a bit of luck can assist 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, was once now not bought in time to be learn yet is incorporated in those complaints. The presence of Professor Dennis Gabor significantly better the casual classes, which regularly turned as lively as one may possibly anticipate in a brand new box. Dr. H. M. A. El-Sum, a specialist to the Douglas complicated learn Laboratories and a pioneer within the box of holography, set the degree with the 1st paper. He supplied a normal advent to the actual rules and functional equipment fascinated about optical and acoustical holography. His paper additionally incorporated a precis of assorted particular ideas at present utilized in sound holography, with the benefits, negative aspects, and barriers concerned for every approach.
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Extra resources for 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
5 to 50 ml of stock iodine solution per gallon of water. 32 Harold Berger quickly in areas where the ultrasonic intensity, and therefore agitation of the developer, is highest. A thorough study of this technique with photographic paper has been made and reported by Arkhangel'skii and Afanas'ev C2 ). 6. 05 W /cm 2 for a high developer concentration and an exposure time of 40 sec. Exposure times could not be too long or the paper would develop completely. An example of an ultrasonic image produced by this method is shown in Fig.
A. , 1967a; J. Acoust. Soc. Am. 42:1169 (1967). 23. L. Larmore, H. M. A. EI-Sum, and A. F. Metherell, J. Opt. Soc. Am. 58:730 (1968). 24. 1. W. Goodman, Appl. Phys. Letters 8:311-313 (1966). 25. 1. E. 1acobs, paper No. II presented at the IEEE Symposium on Sonics and Ultrasonics, Vancouver, Canada, Oct. 1967. 26. D. Gabor, French Patent No. 1,479,712 (March 28, 1967). 27. A. Korpel and P. Desmares, J. Acoust. Soc. Am. (Sept. 1968). 28. R. Adler, A. Korpel, and P. Desmares, paper No. N3 presented at the IEEE Symposium on Sonics and Ultrasonics, Vancouver, Canada, Oct.
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