Liquid transparency changing dynamics estimation by means of digital speckle correlation

The paper presents the speckle images produced by clotting plasma when illuminating with coherent light. By analyzing the changes of speckle images, it is possible to characterize the clotting process. In particular, initial, final, the rate of the reaction, and the prothrombin time can be identified. The results of study prognosticate the possibility to measure the clotting time of the human blood in a real time.