3D shape measurement using deterministic phase retrieval and a partially developed speckle field

Publication: Research - peer-reviewConference article – Annual report year: 2012

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3D shape measurement using deterministic phase retrieval and a partially developed speckle field. / Almoro, Percival F.; Waller, Laura; Agour, Mostafa; Falldorf, Claas; Pedrini, Giancarlo; Osten, Wolfgang; Hanson, Steen Grüner.

In: Proceedings of SPIE, the International Society for Optical Engineering, Vol. 8384, 2012, p. 83840Q.

Publication: Research - peer-reviewConference article – Annual report year: 2012

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Almoro, Percival F.; Waller, Laura; Agour, Mostafa; Falldorf, Claas; Pedrini, Giancarlo; Osten, Wolfgang; Hanson, Steen Grüner / 3D shape measurement using deterministic phase retrieval and a partially developed speckle field.

In: Proceedings of SPIE, the International Society for Optical Engineering, Vol. 8384, 2012, p. 83840Q.

Publication: Research - peer-reviewConference article – Annual report year: 2012

Bibtex

@article{d852252399b44cb78bebb58cf0f6e709,
title = "3D shape measurement using deterministic phase retrieval and a partially developed speckle field",
keywords = "Wavefront reconstruction, Phase retrieval, Digital holography, Speckle, Wave propagation, Diffraction, Diffuser, Phase, Spatial light modulator, Transport of intensity equation",
publisher = "S P I E - International Society for Optical Engineering",
author = "Almoro, {Percival F.} and Laura Waller and Mostafa Agour and Claas Falldorf and Giancarlo Pedrini and Wolfgang Osten and Hanson, {Steen Grüner}",
year = "2012",
doi = "10.1117/12.919223",
volume = "8384",
pages = "83840Q",
journal = "Proceedings of SPIE, the International Society for Optical Engineering",
issn = "1605-7422",

}

RIS

TY - CONF

T1 - 3D shape measurement using deterministic phase retrieval and a partially developed speckle field

A1 - Almoro,Percival F.

A1 - Waller,Laura

A1 - Agour,Mostafa

A1 - Falldorf,Claas

A1 - Pedrini,Giancarlo

A1 - Osten,Wolfgang

A1 - Hanson,Steen Grüner

AU - Almoro,Percival F.

AU - Waller,Laura

AU - Agour,Mostafa

AU - Falldorf,Claas

AU - Pedrini,Giancarlo

AU - Osten,Wolfgang

AU - Hanson,Steen Grüner

PB - S P I E - International Society for Optical Engineering

PY - 2012

Y1 - 2012

N2 - For deterministic phase retrieval, the problem of insignificant axial intensity variations upon defocus of a smooth object wavefront is addressed. Our proposed solution is based on the use of a phase diffuser facilitating the formation of a partially-developed speckle field (i.e., a field with both scattered-wave and unperturbed-wave components). The smooth test wavefront impinges first on the phase diffuser producing the speckle field. Then two speckle patterns with different defocus are recorded at the output plane of a 4f-optical filtering setup with a spatial light modulator (SLM) in the common Fourier domain. The local variations of the recorded speckle patterns and the defocus distance approximate the axial intensity derivative which, in turn, is required to recover the wavefront phase via the transport of intensity equation (TIE). The SLM setup reduces the speckle recording time and the TIE allows direct (i.e., non-iterative) calculation of the phase. The pre-requisite partially-developed speckle field in our technique facilitates high image contrast and significant axial intensity variation. Wavefront reconstruction for the 3D refractive test object used demonstrates the effectiveness of the technique.

AB - For deterministic phase retrieval, the problem of insignificant axial intensity variations upon defocus of a smooth object wavefront is addressed. Our proposed solution is based on the use of a phase diffuser facilitating the formation of a partially-developed speckle field (i.e., a field with both scattered-wave and unperturbed-wave components). The smooth test wavefront impinges first on the phase diffuser producing the speckle field. Then two speckle patterns with different defocus are recorded at the output plane of a 4f-optical filtering setup with a spatial light modulator (SLM) in the common Fourier domain. The local variations of the recorded speckle patterns and the defocus distance approximate the axial intensity derivative which, in turn, is required to recover the wavefront phase via the transport of intensity equation (TIE). The SLM setup reduces the speckle recording time and the TIE allows direct (i.e., non-iterative) calculation of the phase. The pre-requisite partially-developed speckle field in our technique facilitates high image contrast and significant axial intensity variation. Wavefront reconstruction for the 3D refractive test object used demonstrates the effectiveness of the technique.

KW - Wavefront reconstruction

KW - Phase retrieval

KW - Digital holography

KW - Speckle

KW - Wave propagation

KW - Diffraction

KW - Diffuser

KW - Phase

KW - Spatial light modulator

KW - Transport of intensity equation

U2 - 10.1117/12.919223

DO - 10.1117/12.919223

JO - Proceedings of SPIE, the International Society for Optical Engineering

JF - Proceedings of SPIE, the International Society for Optical Engineering

SN - 1605-7422

VL - 8384

SP - 83840Q

ER -