Data acquisition techniques in digital photoelasticity: a review

Advancements in the last two decades for data acquisition in digital photoelasticity have been brought out in this paper. Photoelasticity is an engineering tool and as an end user, one would like to know which of the techniques to be selected for a particular application. With this in view, the various techniques are reviewed and a brief summary of the steps involved in each of the techniques are also given. A need to capture the images in colour is indicated for full automation of data acquisition. Future directions of research in digital photoelasticity is also highlighted.