The demand for tomography (sectional image) data is continuously increasing in the fields of medicine and technology. Various techniques which are in use are essentially based on principles of radiography, ultrasonics, NMR (Nuclear Magnetic Resonance) positron emission etc. which are finding extensive use particularly in the field of medicine. Each of these techniques has its own advantages and disadvantages. Holography as a complete record of three-dimensional perspective surface data (for opaque objects) and high sensitivity has excellent potential for tomography. Obtaining sectionwise data during transient thermal loading by holographic interferometry had been demonstrated earlier [1]. This requires recording or photographing surface data at various instants of time during transient thermal loading. The 'contouring effect' (i. e. the inner contours getting manifested in the surface fringes) is on the exploratory studies carried out on the potentiality of holographic tomography using mechanical loading. The potentiality is shown using image processing of the holographic fringe pattern. An attempt is made to evolve a methodology for this holographic tomography along with discussions on possible practical applications. REFERENCES
A. V. S. S. S. R. Sarma, T. G. G. Kutty, P. S. Mani, V. R. Ravindran, A. S. Sankaranarayanan and S. A. Pillai, "Holographic Non- destructive Testing (HNDT) of Propellant Grains", 42(8), 1025- 1028, 1034 (1985).
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.Vol. 3, pages 1499 - 1502 Publisher:Ashgate Publishing Company
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