Simultaneous Measurement of In-Plane and Out-of-Plane Displacements Using Talbot Fringe Projection

Simultaneous Measurement of In-Plane and Out-of-Plane Displacements Using Talbot Fringe Projection

Blog Article

The fringe projection technique has been widely used in optical measurements.In this paper, we demonstrate a scheme to measure the 3D displacement of a deformed sample using Talbot fringe projection.In this process, we designed a two-dimensional square Talbot hologram.

In this approach, we used the Secretagogue basic principle of triangulation, and a computer-controlled liquid crystal spatial light modulator (LC-SLM) was placed in the optical path.The Talbot array hologram was displayed on the LC-SLM screen and projected onto the surface of a sample.Two patterns were recorded: one before and one after deformation.

We simultaneously acquired the in-plane and Dessert Syrup out-of-plane displacements using the digital image correlation (DIC) method.This scheme is simple and easily implemented.Theoretical and experimental results are presented.