A new three-dimensional(3-D) electronic speckle pattern interferometry(ESPI) system is constructed by using three ESPI systems,a large shearing blocky prism and a reference.In the system,the light source was composed of three lasers,and the reference was attached to the PZT phase shifter.At the same time,the PZT phase shifter could be used to generate a reference light and push reference plane to change optical path of reference light.Then the object light interfered with the reference light through a large...