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Proceedings Paper

Modified Cranz-Shardin camera for both isochromatic and caustic patterns
Author(s): Xian-Ji Su; Q. K. Zhu; Bingsang Fu; Z. Li; Jing Fang
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Paper Abstract

A modified Cranz-Schardin camera is presented that records simultaneously both the isochromatic patterns of dynamic photoelasticity and the shadow patterns of dynamic caustics, which are useful for the investigation of the interaction between the stress waves and the cracks in elastic structures. The system of spark gaps each of them consisting of four electrodes provides point flashes that are small enough in size to form the caustic patterns of good quality and intense enough in light for the recording of the isochromatic patterns of photoelasticity. A chip-microprocessor and some other hardware elements are used in the control system for the time setting of the first delay and variated frame intervals. With the help of a partial reflecting mirror the caustic pattern and the isochromatic patterns are recorded simultaneously with separated films. Some results of the recorded patterns are given to show the validity of this system.

Paper Details

Date Published: 11 October 1993
PDF: 6 pages
Proc. SPIE 2002, Ultrahigh- and High-Speed Photography, Videography, and Photonics '93, (11 October 1993); doi: 10.1117/12.161356
Show Author Affiliations
Xian-Ji Su, Peking Univ. (China)
Q. K. Zhu, Peking Univ. (China)
Bingsang Fu, Peking Univ. (China)
Z. Li, Peking Univ. (China)
Jing Fang, Peking Univ. (China)

Published in SPIE Proceedings Vol. 2002:
Ultrahigh- and High-Speed Photography, Videography, and Photonics '93
Paul W. Roehrenbeck, Editor(s)

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