Shear-unlimited common-path speckle interferometer

Jie Dong; Shengjia Wang; Ali K. Yetisen; Xingchen Dong; Franziska Pöller; Nicholas Ong; Martin Jakobi; Zhanwei Liu; Félix Salazar Bloise; Alexander W. Koch

doi:10.1364/OL.382893

Shear-unlimited common-path speckle interferometer

Jie Dong^*, Shengjia Wang, Ali K. Yetisen, Xingchen Dong, Franziska Pöller, Nicholas Ong, Martin Jakobi, Zhanwei Liu, Félix Salazar Bloise, Alexander W. Koch

^*Corresponding author for this work

School of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

A single-aperture common-path speckle interferometer with an unlimited shear amount is developed. This unlimited shear amount is introduced when a Wollaston prism is placed near the Fourier plane of a common-path interferometer, which is built by using a quasi-4 f imaging system. The fundamentals of the shear amount and the spatial carrier frequency generation are analyzed mathematically, and the theoretical predictions are validated by a static experiment. Mode-I fracture experiments through the three-point bending are conducted to prove the feasibility and the capability of this method in full-field strain measurement with various shear amounts. A remarkable feature of this setup is that no tilt is required between the optical components to produce the unlimited shear amount in off-axis holography.

Original language	English
Pages (from-to)	1305-1308
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	6
DOIs	https://doi.org/10.1364/OL.382893
Publication status	Published - 15 Mar 2020

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Dong, J., Wang, S., Yetisen, A. K., Dong, X., Pöller, F., Ong, N., Jakobi, M., Liu, Z., Bloise, F. S., & Koch, A. W. (2020). Shear-unlimited common-path speckle interferometer. Optics Letters, 45(6), 1305-1308. https://doi.org/10.1364/OL.382893

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abstract = "A single-aperture common-path speckle interferometer with an unlimited shear amount is developed. This unlimited shear amount is introduced when a Wollaston prism is placed near the Fourier plane of a common-path interferometer, which is built by using a quasi-4 f imaging system. The fundamentals of the shear amount and the spatial carrier frequency generation are analyzed mathematically, and the theoretical predictions are validated by a static experiment. Mode-I fracture experiments through the three-point bending are conducted to prove the feasibility and the capability of this method in full-field strain measurement with various shear amounts. A remarkable feature of this setup is that no tilt is required between the optical components to produce the unlimited shear amount in off-axis holography.",

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AU - Wang, Shengjia

AU - Yetisen, Ali K.

AU - Dong, Xingchen

AU - Pöller, Franziska

AU - Ong, Nicholas

AU - Jakobi, Martin

AU - Liu, Zhanwei

AU - Bloise, Félix Salazar

AU - Koch, Alexander W.

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Shear-unlimited common-path speckle interferometer

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