Abstract
A simple method is proposed for obtaining curvature of plate surfaces. The experimental arrangement is based on the Ligtenberg reflection moire principle. Shifting two identical grating images relative to each other, which are optically superposed, results in moire curvature fringes. The shifting is done with a Wollaston prism which is positioned in front of the camera objective. Because of the simultaneity of the superposition, the method is well suited for dynamic problems.
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