Abstract
The advantages of spatial phase shifting (SPS) compared with temporal
phase shifting in the field of electronic speckle pattern interferometry are
described. Some periodic phase reconstruction errors occurring in SPS are
discussed. It is shown that these errors become minimal for a spatial
phase-shift angle of 2π/3. Furthermore, a modified phase
reconstruction formula is presented by which the noise in the reconstructed
phase map is reduced.
© 1997 Optical Society of America
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