Image Quality and Diffraction Efficiency of a Holographic Lens for Sound Waves
A holographic lens for sound waves has been constructed and its imaging properties investigated theoretically and experimentally. First we discuss the advantages of holographic lenses over both conventional lenses and phased arrays. Then we use the techniques described in a separate paper for a theoretical study of the image quality and diffraction efficiency of the holographic lens. Finally, we compare the theoretical results with those obtained in a water tank experiment.
KeywordsIntensity Distribution Image Plane Quantization Level Diffraction Efficiency Side Lobe
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- 1.Wess and C. Scherg, An Ultrasonic Fresnel Lens Imaging System with High Lateral Resolution, Ultrasonics International, 534–539 (1979).Google Scholar
- 2.H. Heier and J.J. Stamnes, Acoustical Cameras for Underwater. Surveillance and Inspection, Proc. Underwater Technology Conference, Bergen, Pergamon Press (1980).Google Scholar
- 3.H. Heier, A Wide-Angle Diffraction Limited Holographic Lens System for Acoustical Imaging, in A.F. Metherell (ed.), AcousticalImaging Vol. 10, Plenum Press.Google Scholar
- 4.J.J. Stamnes and T. Gravelsmter, Methods for Efficient Computation of the Image Field of Holographic Lenses for Sound Waves, in A.F. Metherell (ed.), AcousticalImaging Vol. 10, Plenum Press.Google Scholar
- 5.M. Born and E. Wolf, Principles of Optics, 4th ed., Pergamon, New York, Sec. 8.5.2 (1970).Google Scholar
- 6.M. Born and E. Wolf, Principles of Optics, 4th ed., Pergamon, New York, Sec. 8.8 (1970).Google Scholar
- 7.W.C. Sweatt, Describing holographic optical elements as lenses, J. Opt. Soc. Am. 67: 803–808 (1977).Google Scholar
- 8.W.T. Welford, Aberrations of the Symmetrical Optical System, Academic Press, London (1974).Google Scholar