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Since the first papers by E. N. Leith and J. Upatnieks on the subject of holography appeared in 1961, there has been a virtual explosion of research activity in the field. More than 500 papers and articles on holo graphy have appeared in the last ten years. Many applications of holo graphy have been proposed, and some of these are beginning to enter the realm of usefulness. One of the applications that appears to hold great promise is acoustic imaging by means of holography. The first papers on this subject appeared in 1966, but already research activity in the field is burgeoning. Three symposia wholly devoted to acoustical holography have been held and the papers published in book form. The purposeof this book is to bring together the results of research in acoustical holography, some of it as yet unpublished, under one cover so that workers in holography, nondestructive testing, medical imaging, underwater imaging, and seismic exploration can decide whether this new technique can be useful to them.
List of contents
1. Introduction.- 1.1. Fundamental Concepts.- 1.2. Historical Development.- References.- 2. Holography.- 2.1. Recording Process.- 2.2. Reconstruction Process.- 2.3. Gabor Holography.- 2.4. Leith-Upatnieks Holography.- 2.5. Hologram Classification.- 2.6. Image Location.- 2.7. Magnification.- 2.8. Aberrations.- 2.9. Distortion.- 2.10. Resolution.- References.- 3. Acoustics.- 3.1. Introduction.- 3.2. Mechanical Vibrations.- 3.3. Propagation of Sound in Liquids.- 3.4. Propagation of Sound in Solids.- 3.5. Interaction of an Acoustic Wave with a Liquid Interface.- 3.6. Summary.- References.- 4. Scanned Acoustical Holography.- 4.1. Scanned Receiver.- 4.2. Scanned Source.- 4.3. Scanned Object.- 4.4. Simultaneous Scanning.- 4.5. Recording and Reconstruction.- 4.6. Time Gating.- References.- 5. Sampled Holograms.- 5.1. Sampling Theory.- 5.2. Information Content of Holograms.- 5.3. Special Sampling Schemes.- References.- 6. Liquid-Surface Holography.- 6.1. Introduction.- 6.2. Description of the Acoustical Field.- 6.3. Acoustical Transfer Functions for a Continuous Wave Hologram.- 6.4. Interaction of Light with the Liquid Surface.- 6.5. Effects Produced by Pulsing the Sound Waves.- 6.6. Transfer Function Relating Liquid-Surface Ripple Displacement to Acoustic Radiation Pressure.- References.- 7. Other Acoustical Holography Methods.- 7.1. Photographic Film.- 7.2. Ultrasound Camera.- 7.3. Particle Cell.- 7.4. Bragg Diffraction Imaging.- 7.5. Thermoplastic Film.- 7.6. Optical and Electronic Readout Methods.- References.- 8. Applications.- 8.1. Underwater Viewing.- 8.2. Geophysical Applications.- 8.3. Nuclear Reactor Surveillance.- 8.4. Medical Imaging.- 8.5. Nondestructive Testing.- 8.6. Interferometry.- 8.7. Summary.- References.
