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Opt Lett. 2005 Jun 1;30(11):1297-9.

High-resolution volume holographic profilometry using the Viterbi algorithm.

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1
Department of Mechanical Engineering, Room 3-471c, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.

Abstract

We use the Viterbi decoding algorithm to resolve depth features beyond the nominal resolution limit of a volume holographic profilometry system. The formulation treats the truncated point-spread function as an intersymbol interference and uses surface constraints and transition constraints to reduce the computational complexity. A factor-of-5 improvement in resolution was obtained in our experimental demonstration.

PMID:
15981512
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