Oswald Leroy
![]() | This biographical article is written encyclopedic . (May 2014) |
Oswald Jozef Leroy | |
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KU Leuven | |
Doctoral advisor | Robert A. Mertens |
Oswald Jozef Leroy (16 May 1936 – 7 September 2022) was a Belgian mathematician known for his contributions to theoretical acousto-optics.
Leroy's biggest achievement was a theoretical study of the interaction of light with two adjacent ultrasonic beams under different conditions in terms of beam shape, frequency content and intensity.[1][2][3][4] Understanding of this phenomenon was very important in the 1970s when new acousto-optic devices were developed (mainly due to novel developments in laser technology) that utilized adjacent ultrasonic beams. Such devices were being used in optical modulators,[5] optical scanners,[6] information processing[7][8][9] , optical filtering[10] and frequency-spectrum analysis.[11][12][13] Before his contribution only the interaction of light with one ultrasonic beam was understood.[citation needed] Since then, acousto-optic devices have been used in telecommunication and military applications.[citation needed]
Leroy died at Ostend, Belgium in 2022.[14]
Career
Leroy received his PhD from
Awards
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Oswald_Leroy_Doctor_Honoris_Causa_University_Gdansk_1991.jpg/220px-Oswald_Leroy_Doctor_Honoris_Causa_University_Gdansk_1991.jpg)
In 1991 Leroy was awarded an
Selected articles
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Oswald_Leroy_Team_1972-2001.jpg/220px-Oswald_Leroy_Team_1972-2001.jpg)
- Leroy O., "Diffraction of light by two adjacent parallel ultrasonic-waves", journal of the acoustical society of America 51(1), 148, 1972
- Leroy O., "Theory of diffraction of light by ultrasonic-waves consisting of a fundamental tone and its first n − 1 harmonics", ultrasonics 10(4), 182, 1972
- Leroy O., "Diffraction of light by 2 adjacent parallel ultrasonic beams", acustica 29(5), 303–310, 1973
- Leroy O., "General symmetry properties of diffraction pattern in diffraction of light by parallel adjacent ultrasonic beams", journal of sound and vibration 26(3), 389–393, 1973
- Leroy O., "Diffraction of light by 2 parallel adjacent ultrasonic-waves, having same wavelengths", journal of sound and vibration 32(2), 241–249, 1974
- Leroy, O., "TI light-diffraction caused by adjacent ultrasonics", IEEE transactions on sonics and ultrasonics su22(3), 233, 1975
- Poleunis F., Leroy O., "Diffraction of light by 2 adjacent parallel ultrasonic-waves, one being a fundamental tone and other its 2nd harmonic", journal of sound and vibration 58(4), 509–515, 1978
- Leroy O., Mertens R., "Diffraction of light by adjacent parallel ultrasonic-waves with arbitrary frequencies (noa-method)", acustica 26(2), 96, 1972
- W. Hereman, R. Mertens, F. Verheest, O. Leroy, J.M. Claeys, E. Blomme, "Interaction of light and ultrasound : Acoustoopics", Physicalia Magazine 6(4), 213–245, 1984.
Books
- Physical Acoustics – Fundamentals and Applications, M.A. Breazeale O. Leroy (Eds.), Plenum US, 1991
- Advances in Acousto-Optics : 5th International Meeting of the European Acousto-Optical Club, Oswald Leroy (Edt.), Institute of Physics, 2001.
References
- ^ Sliwinski A., "Acoustooptics and its perspectives in research and applications", ultrasonics 28(4), 195–213, 1990
- ^ Poon T. C., Chatterjee M. R., Banerjee P. P., "multiple plane-wave analysis of acoustooptic diffraction by adjacent ultrasonic beams of frequency ratio 1 : m", Journal of the Optical Society of America a-optics image science and vision 3(9), 1402–1406, 1986
- ^ Balakshii V. I., Nagaeva I. A., "Diffraction of light by two collinear acoustic waves of different frequencies: the mode competition", Journal of Communications Technology and Electronics 45(5), 543–547, 2000
- ^ Gondek G., Katkowski T., Kwiek P., "diffraction of light by two ultrasonic beams of frequency ratio 1 : 2, beyond the Raman-Nath diffraction regime", ultrasonics 38(1-8), 845–848, 2000
- ^ Pinnow D. A., IEEE J. Quant. Electr. QE-6, 223–238, 1970
- ^ Uchida N., Niizeki N., Proc. IEEE 61, 1073–1092, 1973
- ^ Kashiwaga E., Sakurai K., in ‘Ultrasonic imaging and holography – Medical, sonar and optical applications’, Eds. G. W. Stroke, W. E. Kock, Y. Kikuchi, J. Tsujiuchi, Plenum press NY, 201–228, 1874
- ^ Korbukov T. E., Kulakov S. V., Acousto-Optical methods in information processing. Mackinostroene, Leningrad, 1978
- ^ Korpel A., in ‘Optical information processing’, Eds Yu E. Nesterikhin, G. W. Stroke, W. E. kock, Plenum Press, NY, 171–193, 1976
- ^ Chang T. C., Opt. Eng. 16, 455–460, 1977, also SPIE 90, 12–22, 1976
- ^ Damon R. W., Maloney W. T., McMahon D. H., in ‘Physical acoustics : Principles and Methods VII’, Eds W. P. Mason and R. N. Thurston, Academic Press, NY, 273–366, 1970
- ^ Hecht D. L., Opt. Eng. 16, 461–466, 1977; also in SPIE 90, 148–163, 1976
- ^ Maloney W. T., IEEE Spectrum 6, 40–48, 1969
- ^ Declercq, Nico F. "Obituary: Oswald Jozef Leroy, 1936–2022" (PDF). Acoustics Today (Spring 2023).
- ^ Oswald J. Leroy, Robert A. Mertens, "Theoretical Acousto-Optics in Belgium", Opt. Eng. 31(10), 2048–2061 (Oct 01, 1992). doi:10.1117/12.58876
- ^ List of Honorary Doctorates Awarded by the University of Gdańsk