R. Henao et al., DETERMINATION OF THE ZERO-ORDER FRINGE POSITION IN DIGITAL SPECKLE PATTERN INTERFEROMETRY, Applied optics, 36(10), 1997, pp. 2066-2069
A method for determining the position of the zero-order fringe in a me
trological experiment with digital speckle pattern interferometry is p
roposed. It is based on an averaging procedure with shifted images obt
ained before and after a load is applied. This technique is a compleme
nt to the phase-shifting methods. Experimental examples are shown. (C)
1997 Optical Society of America.