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Proceedings Paper

Real Time Measurement Of An Object's Small Displacement By High Speed Video Camera With Moire Pattern
Author(s): Rang Seng Chang
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Paper Abstract

The resolution of a high speed video camera is not so high as photographic film, therefore the measurement of a small shift, such as the vibration of object is sometimes impossible. Here we suggest to use a grids cover on the object and pass this image through another transparent grids to the camera. It will generate a moire fringe which produce the equivalent resolution thousand times than before. We also put a corrdina te mask on the screen of the video TV, it is not only let us get a possibility to measure the small displacement of object which we can not see by video camera before, but also gives us a real time 3 Dimensional data. The mask errors generated hr the curved screen are also discussed.

Paper Details

Date Published: 2 November 1984
PDF: 6 pages
Proc. SPIE 0497, High Speed Photography, Videography, and Photonics II, (2 November 1984); doi: 10.1117/12.944493
Show Author Affiliations
Rang Seng Chang, Chung Shan Institute of Technology (Rep. of China)

Published in SPIE Proceedings Vol. 0497:
High Speed Photography, Videography, and Photonics II
Austin L. Vick, Editor(s)

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