Digital interferometry using sequentially recorded intensity patterns

B. Gombkötö; J. Kornis

doi:10.1117/12.827527

17 June 2009 Digital interferometry using sequentially recorded intensity patterns

B. Gombkötö, J. Kornis

Proceedings Volume 7389, Optical Measurement Systems for Industrial Inspection VI; 73890X (2009) https://doi.org/10.1117/12.827527
Event: SPIE Europe Optical Metrology, 2009, Munich, Germany

Abstract

Sequentially recorded intensity patterns reflected from a laser illuminated diffuse object can be used to reconstruct the complex amplitude of the scattered beam. Several iterative phase retrieval algorithms are known in the literature to obtain the initially unknown phase from these longitudinally displaced intensity patterns. When two sequences are recorded in two states of the object in similar experimental setups, as is digital holographic interferometry - but omitting the reference wave-, displacement, deformation, or shape measurement can be done. Although the object-beam-only setup is not so sensitive to vibrations, several other factors influence the success of the measurements, the position or angle alignment of the linear stage. The results of initial simulations and measurements of displacement are presented, and the convergence of the phase retrieval is examined.

Citation Download Citation

B. Gombkötö and J. Kornis "Digital interferometry using sequentially recorded intensity patterns", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73890X (17 June 2009); https://doi.org/10.1117/12.827527

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