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Juan-Antonio Rayas-Alvarez

Bio: Juan-Antonio Rayas-Alvarez is an academic researcher from Centro de Investigaciones en Optica. The author has contributed to research in topics: Interferometry & Speckle pattern. The author has an hindex of 2, co-authored 2 publications receiving 9 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a Mach-Zehnder configuration coupled to a 4-f arrangement using phase gratings placed on the Fourier plane was implemented to analyze phase objects. But the interference of the fields associated with replicated beams, centered on each diffraction order, is achieved varying the spacing of windows with respect to the grating period.
Abstract: This communication describes some details of polarization modulation that are useful in phase-shifting interferometry when applied to phase profile measurements of phase objects. Since non-destructive optical techniques allow surface measurement with high accuracy, a Mach-Zehnder configuration coupled to a 4-f arrangement using phase gratings placed on the Fourier plane was implemented to analyze phase objects. Each beam of the interferometer goes through a birefringent wave plate in order to achieve nearly circular polarization of opposite rotations, with respect to each other. The interference of the fields associated with replicated beams, centered on each diffraction order, is achieved varying the spacing of windows with respect to the grating period. Experimental results are presented for cases of four and nine simultaneously captured interferograms.

10 citations

Proceedings ArticleDOI
05 Nov 2014
TL;DR: In this article, experimental results obtained by applying both technique, Electronic Speckle Pattern Interferometry (ESPI) and Electronic Spearle Pattern Shearing Interference (ESPSI), were compared in the study of composite materials.
Abstract: Experimental results obtained by applying both technique, Electronic Speckle Pattern Interferometry (ESPI) and Electronic Speckle Pattern Shearing Interferometry (ESPSI) were compared in the study of composite materials. We found that the difference between the strain fields obtained by ESPSI and ESPI was roughly a constant. This result was expected since, although ESPI in turn allows computing absolute strain values, the strains measured by ESPSI are relative to a reference that must be measured by an additional method.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a common-path interferometer is built using a 4 f optical system with a ronchi ruling used as a spatial filter and a cubic beamsplitter used as an interferogram duplicator.

18 citations

Proceedings ArticleDOI
Hongyi Bai1, Mingguang Shan1, Zhi Zhong1, Lili Guo1, Zhang Yabin1 
26 Jan 2016
TL;DR: In this paper, a parallel common path phase-shifting interferometer using a digital reflective grating realized by a digital micromirror device (DMD) is presented.
Abstract: A parallel common path phase-shifting interferometer is presented using a digital reflective grating realized by a digital micromirror device (DMD). The interferometer based on a modified Michelson architecture is constructed by a beamsplitter, a pinhole mirror, a digital reflective Ronchi grating and two lenses with same focal length to build a 4f optical system. In the interferometer, the pinhole mirror is used to low-filter the input-beam to act as reference beam, and the grating is used to introduce phase shift among +1, 0, and −1 diffraction orders of the input-beam to act as object beam. Then the specimen phase can be reconstructed from the three phase-shifted interferograms recorded in one shot using a normalize algorithm. The theoretical analysis and experiments are carried out to demonstrate the feasibility and accuracy of the proposed method.

4 citations

Journal ArticleDOI
TL;DR: In this article, a split Mach-Zehnder interferometer is proposed for phase modulation of p- and s- polarized beams in a surface plasmon resonance based phase sensitive interference imaging platform.

4 citations

Dissertation
01 Nov 2014
TL;DR: This thesis introduces the application of a high-speed speckle pattern interferometer (SPI) to perform quantified impact modal testing and applied the SPI to the novel measurement of traveling waves on a centre-clamped disc.
Abstract: This thesis introduces the application of a high-speed speckle pattern interferometer (SPI) to perform quantified impact modal testing. The interferometer acts as a non-contact multipoint vibrometer that removes the mass-loading e↵ects of contact transducers to improve measurement accuracy and decreases measurement time by the use of multiple measurement points. A temporal phase-stepped CMOS high-speed SPI system was used to capture the transient vibration response of two overlapping plates, the system had a maximum surface velocity of 1.4 mm/s and the results were compared to accelerometer data and correlated against a finite element model. To extend the surface velocity to 2.7 mm/s a spatial phase-stepped CMOS SPI system was used and compared to the finite element model. Both the temporal phase-stepped system and the spatial phase-stepped system showed high performance for quantified modal testing: showing high correlation for the natural frequencies and the modal assurance criterion correlated over 60% for the first six modes of vibration. The interferometer was improved by the application of spatial phase-stepping but was still limited by the maximum measurable velocity. The thesis also applied the SPI to the novel measurement of traveling waves on a centre-clamped disc. Traveling waves can be caused by structural problems or damage and are di cult to measure without the ability to capture the relative phase across multiple points. This was achieved through the spatial phase-stepped CMOS SPI system and the traveling waves were excited on the disc through a frequency modulated signal that excited the degenerate modes that occurred within 1 Hz of the disc’s second resonant frequency. The multipoint system identified the waveshape, direction and was able to show the ratio of standing wave to traveling wave in the measurements.

3 citations

Journal ArticleDOI
TL;DR: A calculation method for a quadrature phase-shifting interferometer is presented, and its applications to specular and speckle interferometers and digital holography are described.
Abstract: A calculation method for a quadrature phase-shifting interferometer is presented, and its applications to specular and speckle interferometers and digital holography are described. Two sets of quadrature phase-shifted interferograms are acquired, and the calculation method proposed gives the phase distribution of the interferograms. The principle of the calculation method with error analysis and experimental results for specular and speckle interferometers and digital holography are also given.

3 citations