Universal digital speckle shearing interferometer.

@article{Ganesan1988UniversalDS,
  title={Universal digital speckle shearing interferometer.},
  author={A. R. Ganesan and Devender Kumar Sharma and Mahendra Prasad Kothiyal},
  journal={Applied optics},
  year={1988},
  volume={27 22},
  pages={4731-4}
}
A speckle shear interferometer is presented which can be used to yield lateral, radial, rotational, and inversion shear fringes in real time in conjunction with a digital image processing system. A modification of the optical arrangement yields reversal or folding shear as well. Experiments are conducted on an edge-clamped diaphragm with concentrated load. Unit contrast fringes have been obtained by resorting to nonlinear processing techniques such as level slicing. The results are presented… CONTINUE READING

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