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Proceedings Paper

Speckle correlation methods applied to ballistics and explosives
Author(s): Stephen G. Grantham; John E. Field
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Paper Abstract

Image correlation techniques developed for speckle metrology have recently been applied to a wide range of ballistics and explosives studies at the Cavendish Laboratory. White-light image correlation applied to quasi-static testing of explosives, at a range of magnifications, is discussed. High-speed ballistic measurements were performed using Digital Speckle Radiography (DSR): a combination of iamge correlation with flash X-rays to study the movement of a plane of X-ray opaque filings within a sample. DSR operates by capturing one image before and a second during the event, allowing the displacements on the plane to be measured to sub-mm accuracy. Varying the delay time and the depth of the seeded plane gives a full three-dimensional flow field in the sample. The use of two X-ray heads stereoscopically increases accuracy by allowing all three components of displacement to be determined. Measurements at velocities ranging from 100 m s-1 to 6 km s-1 have been achieved using this technique.

Paper Details

Date Published: 27 May 2003
PDF: 6 pages
Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); doi: 10.1117/12.516571
Show Author Affiliations
Stephen G. Grantham, Univ. of Cambridge (United Kingdom)
John E. Field, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 4933:
Speckle Metrology 2003
Kay Gastinger; Ole Johan Lokberg; Svein Winther, Editor(s)

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