27 May 2003 Speckle correlation methods applied to ballistics and explosives
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Proceedings Volume 4933, Speckle Metrology 2003; (2003) https://doi.org/10.1117/12.516571
Event: Speckle Metrology 2003, 2003, Trondheim, Norway
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen G. Grantham, Stephen G. Grantham, John E. Field, John E. Field, } "Speckle correlation methods applied to ballistics and explosives", Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); doi: 10.1117/12.516571; https://doi.org/10.1117/12.516571

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