Study on force distribution of the tempered glass based on laser interference technology

The force distribution of inside the tempered glass is detected by the Mach–Zehnder interferometer. In the experiment, the interference fringes are captured by a CCD camera, filtered in frequency domain, and the tempered glass real phase distribution is obtained by utilizing branch-cut algorithm for phase unwrapping. The tempered glass internal force distribution can be derived by means of the relationship between phase distribution and external force. The results demonstrated that the force distribution is almost linear in direction to parallel the external pressure; although some fluctuations appear to be perpendicular to the external pressure, the overall change is smaller.