Real Time Measurement Of An Object's Small Displacement By High Speed Video Camera With Moire Pattern

Rang Seng Chang

doi:10.1117/12.944493

2 November 1984 Real Time Measurement Of An Object's Small Displacement By High Speed Video Camera With Moire Pattern

Rang Seng Chang

Proceedings Volume 0497, High Speed Photography, Videography, and Photonics II; (1984) https://doi.org/10.1117/12.944493
Event: 28th Annual Technical Symposium, 1984, San Diego, United States

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.

Citation Download Citation

Rang Seng Chang "Real Time Measurement Of An Object's Small Displacement By High Speed Video Camera With Moire Pattern", Proc. SPIE 0497, High Speed Photography, Videography, and Photonics II, (2 November 1984); https://doi.org/10.1117/12.944493

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