A Scanned Curvilinear Acoustical Holography System for Geological Inspection of Internal Structures in Rock
This paper describes a curvilinear scanned acoustical holographic device for imaging various internal objects in geological structures. The rapid-scanning system was developed to provide near real-time holography without the stringent requirements of the usual rectilinear scanned systems. The system has the capability of generating a circular scanned hologram in 15 seconds and this could be reduced with the addition of multiple receivers. The acoustic reference beam is simulated electronically with a selectable inclination angle to provide spatial separation of the images.
KeywordsInclination Angle Reference Beam Large Aperture Scanning Velocity Holographic Image
Unable to display preview. Download preview PDF.
- 1.Battelle Northwest Research Report on “Ultrasonic Holography Using a Circular Scanning Technique” to Holotron Corporation, Wilmington, Delaware; October 1968.Google Scholar
- 3.T. O. Price, B. B. Brenden, H. D. Collins, J. Spalek, “Scanned Acoustical Holography for Geological Prediction in Advance of Rapid Underground Excavation”; Phase I Technical Report submitted bv Holosonics to National Science Foundation; NSF Grant No G143686, May 30, 1975.Google Scholar
- 4.H. D. Collins, B. P. Hildebrand, The Effects of Scanning Position and Motion Errors on Hologram Resolution“, Acoustical Holography Volume 4 Plenum Press, New York, 197 pp. 467–500.Google Scholar
- 5.H. D. Collins and R. P. Cribble, “Acoustic Holographic Scan-ping Techniques for Imaging Flaws in Thick Metal Sections” Seminar-in-Depth on Imaging Techniques for Testing and In-spection (SPIE), February 14–15, 1972, Los Angeles, CaliforniaGoogle Scholar
- 6.H. D. Collins and B. P. Hildebrand; “Evaluation of Acoustical Holography for Inspection of Pressure Vessel Sections” Paper presented to the Joint ASME (USA) Institution of Mechanical Engineers, London, England, May, 1972.Google Scholar
- 7.H. Dale Collins and B. B. Brenden, “Acoustical Holographic Transverse Wave Scanning Technique for Imaging Flaws in Thick Walled Pressure Vessels”, Acoustical Holography Volume 5, Plenum Press, New York, pp. 175–136 (1974).Google Scholar
- 8.B. P. Hildebrand and B. B. Brenden, An Introduction to Acoustical Holography Plenum Press, New York 1972.Google Scholar
- 9.J. W. Goodman, Introduction to Fourier Optics McGraw-Hill, New York, 1968Google Scholar