.Design and experiment of electronic speckle shearing phase-shifting pattern interferometer[J].Optoelectronics Letters,2008,4(1):59-61 Design and experiment of electronic speckle shearing phase-shifting pattern interferometer XU Tian-hua JING Chao JING Wen-cai ZHANG Hong-xia JIA Da-gong ZHANG Yi-mo College of Precision Instrument ＆ Optoelectronics Engineering, National Education ministry Key Laboratory of Optoelectronics Information and Technical Science, Tianjin University, Tianjin 300072, China Abstract:       An electronic speckle shearing phase-shifting pattern interferometer (ESSPPI) based on Michelson interferometer was based in this paper. A rotatable mirror driven by a step motor in one of its reflective arm is used to generate an adjustable shearing and the mirror driven by piezoelectric transducer (PZT) in the other reflective arm was used to realize phaseshifting. In the experiments, the deformation of an aluminum plate with the same extern-force on different positions and different forces on the same position is measured. Meanwhile, the phase distribution and phase-unwrap image of the aluminum plate with the extern-force on its center position is obtained by the four-step phase-shifting method. Hits: 3738 Download times: 194 View Full Text    Download reader