Speckles are inherently an interference phenomenon produced when an optically rough surface or a turbulent medium introduces some degree of randomness to a reflected or a transmitted electromagnetic field. Speckles are often nuisance in coherent image formation. Speckle patterns are however a useful tool for displacement and deformation as well as vibration and stress analysis. The development of speckle photography to speckle interferometry and digital holographic interferometry is described in this paper.
© 2012 Optical Society of America
Original Manuscript: August 23, 2012
Manuscript Accepted: September 21, 2012
Published: December 21, 2012
(2013) Advances in Optics and Photonics
Hans J. Tiziani and Giancarlo Pedrini, "From speckle pattern photography to digital holographic interferometry [Invited]," Appl. Opt. 52, 30-44 (2013)