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Advances in phase-stepping real-time holography using photorefractive sillenite crystals

M. R. R. GESUALDI1, E. A. BARBOSA2,* , M. MURAMATSU3

Affiliation

  1. Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraiba, Av. Shishima Hifumi, 2911, Urbanova, CEP12244-000, São José dos Campos – SP, Brazil
  2. Laboratório de Óptica Aplicada, Faculdade de Tecnologia de São Paulo, CEETEPS-UNESP, Pça Cel Fernando Prestes, 30, CEP 01124 060, São Paulo – SP, Brazil
  3. Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187. CEP 05508-900, Cid.Universitária, São Paulo - SP – Brazil

Abstract

This work presents a review of recent developments in phase-stepping real-time holographic interferometry with photorefractive sillenite crystals. Quantitative results are shown in micro-rotation, micro-displacement, and micro deformation measurements, and in wave-optics and surface analysis as well. The phase stepping was carried out in a four frame process and the resulting phase map was unwrapped by applying a sin/cos filter. The experimental results are in good agreement with the ones obtained through other means, showing the promising potentialities of phase-stepping real time holographic interferometry for in situ visualisation, monitoring and analysis in non-destructive testing..

Keywords

Holography, Interferometry, Phase shifting.

Submitted at: June 7, 2006
Accepted at: July 20, 2006

Citation

M. R. R. GESUALDI, E. A. BARBOSA, M. MURAMATSU, Advances in phase-stepping real-time holography using photorefractive sillenite crystals, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 4, pp. 1574-1583 (2006)