Single-aperture spatial phase-shifting technique for speckle shearography based on modified Michelson interferometer

Abstract. A modified Michelson interferometer for spatial phase shifting speckle shearography is presented. The interferometer consists of one slit aperture, one beam splitter, and two spherical mirrors. Spatial carrier frequency and shear are both generated by one translated spherical mirror. The slit aperture controls the speckle size. These arrangements make the system simple and easy to align. The shear is proportional to the translation of the spherical mirror. Shear distortion due to the rotated mirror in a traditional Michelson interferometer is avoided as well. The carrier frequency is proven to be constant in image plane and can be conveniently adjusted by translating the spherical mirror without changing imaging setup. Fourier analysis method is applied to accurately calibrate carrier frequency. Finally, experimental dynamic deformation results of a center loaded metal plate using the proposed method are provided.

[1]  Ole Lekberg.  Electronic speckle pattern interferometry , 1980 .

[2]  Jesus Blanco-Garcia,et al.  Double-pulsed-carrier speckle-shearing pattern interferometry for transient deformation analysis , 1998, Optics & Photonics.

[3]  Hans J. Tiziani,et al.  Large in-plane displacement measurement in dual-beam speckle interferometry using temporal phase measurement , 1998 .

[4]  Lianxiang Yang,et al.  Digital Shearography for Nondestructive Testing: Potentials, Limitations, and Applications , 2004 .

[5]  Jung-Ryul Lee,et al.  Investigation of shear distance in Michelson interferometer-based shearography for mechanical characterization , 2008 .

[6]  Guillermo H. Kaufmann,et al.  Digital speckle pattern interferometry and related techniques , 2001 .

[7]  Mário Vaz,et al.  A new set-up for pulsed digital shearography applied to defect detection in composite structures , 2004 .

[8]  M. P. Kothiyal,et al.  Use of spatial phase shifting technique in digital speckle pattern interferometry (DSPI) and digital shearography (DS). , 2006, Optics express.

[9]  K. Baker,et al.  A single-shot pixellated phase-shifting interferometer utilizing a liquid-crystal spatial light modulator. , 2006, Optics letters.

[10]  Yasuhiro Awatsuji,et al.  Parallel quasi-phase-shifting digital holography , 2004 .

[11]  Luigi Bruno,et al.  Phase shifting speckle interferometry for dynamic phenomena. , 2008, Optics express.

[12]  Xianyu Su,et al.  Fourier transform profilometry:: a review , 2001 .

[13]  R S Sirohi,et al.  Spatial phase shifting for pure in-plane displacement and displacement-derivative measurements in electronic speckle pattern interferometry (ESPI). , 1997, Applied optics.

[14]  K. Creath.  Phase-Shifting Speckle Interferometry , 1985, Optics & Photonics.

[15]  H J Tiziani,et al.  Speckle interferometry with temporal phase evaluation for measuring large-object deformation. , 1998, Applied optics.

[16]  Chang Cai,et al.  Improved Mach-Zehnder interferometer-based shearography , 2012 .

[17]  Lianxiang Yang,et al.  Recent developments in digital shearography for nondestructive testing , 2006 .

[18]  O. J. Løkberg,et al.  Electronic speckle pattern interferometry using a CO2 laser , 1984 .

[19]  Giancarlo Pedrini,et al.  Quantitative evaluation of digital shearing interferogram using the spatial carrier method , 1996 .

[20]  Mahendra P. Kothiyal,et al.  Digital speckle pattern interferometry (DSPI) with increased sensitivity: Use of spatial phase shifting , 2007 .

[21]  T. Bothe,et al.  Spatial phase shifting in electronic speckle pattern interferometry: minimization of phase reconstruction errors. , 1997, Applied optics.

[22]  Manuel Servin,et al.  A Novel Technique for Spatial Phase-shifting Interferometry , 1995 .