2014
DOI: 10.1364/ao.53.007534
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Phase-shifting lateral shearing interferometry using wedge-plate and interferometric grating

Abstract: A simple and robust method for introducing a phase-shifting test procedure in a wedge-plate shearing interferometer is proposed. The output of the wedge-plate lateral shearing interferometer (LSI) is superposed onto a sinusoidal grating, forming a moiré pattern. The in-plane translation of grating perpendicular to the grating lines is used for introducing a known amount of phase shifts in the interferometer. Direct measurement of phase using a four-step phase-shifting method is undertaken. The applicability of… Show more

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Cited by 10 publications
(2 citation statements)
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“…By employing different algorithms for extracting a phase map from several highly intense fringe patterns [1][2][3][4], PSI has been implemented using almost all kinds of interferometric imaging systems. For all algorithms, a discrete or continuous temporal phase shift is presented.…”
Section: Introductionmentioning
confidence: 99%
“…By employing different algorithms for extracting a phase map from several highly intense fringe patterns [1][2][3][4], PSI has been implemented using almost all kinds of interferometric imaging systems. For all algorithms, a discrete or continuous temporal phase shift is presented.…”
Section: Introductionmentioning
confidence: 99%
“…Em aplicações que usam interferometria holográfica, os parâmetros de interesse podem ser extraídos de medições de diferença de fase entre os feixes objeto e referência. Para conseguir isto, é requerida técnicas de quantificação de fases, onde a mais conhecida e aplicada amplamente é a técnica do deslocamento de fase temporal [47,48,49,50,51,4], que geralmente é implementada pela captura de consecutivos interferogramas com um deslocamento de fase específico e bem calibrado entre eles. Do ponto de vista experimental, os passos de fase são feitos movendo um espelho montado em um transdutor piezelétrico colocado geralmente no feixe de referência.…”
Section: Introductionunclassified