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Digital Photography in Measurements of Shifts of Object Surfaces with Formation of the Speckle Structure In White Light |
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| Authors: | T V Mironova T T Sultanov V A Zubov |
| Institution: | (1) Russian Academy of Sciences, P. N. Lebedev Physical Institute, Leninskii Pr. 53, Moscow, 119991, Russia;(2) Center of the Russian Federation ``Institute of Theoretical and Experimental Physics,', Ul. B. Cheremushkinskaya 25, Moscow, 117218, Russia |
| Abstract: | We describe and analyze the experimental realization of a speckle interferometry scheme designed for measurement of the value of the shift of the object surface along the surface itself. In contrast to classical speckle interferometric schemes, we use a specially formed two-dimensional pattern of the random binary structure as a speckle structure. The pattern being illuminated by the white light is photographed with the use of a digital camera. Further processing of the information related to the Fourier transformation of the pictures registered and determination of the obtained fringe structure period is carried out in a PC. |
| Keywords: | measurement of shifts speckle interferometry digital photography random binary pattern |
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