2004 Volume 48 Pages 523-528
This paper presentsa new innovativem ethod for measuringt wo-dimensionawl aterl evel variations.T his method uses a pair of images captured by a stereo arrangement of CCD cameras. With this method it is possible to measure the instantaneous water surface form non-intrusively. At first, we explain the measurement principal and the experimental procedure for obtaining stereo images. Second, we exam measurement accuracy by applying our technique to waves and surface ripples generated by a falling drop, and find that we can resolve waves as small as 1mm. Third, we measure periodic surface fluctuation produced in an asymmetry cavity with a reasonable accuracy. Finally, we describe the problems of this technique and future research plans.
