Phase-shifting real-time holographic interferometry applied to load transmission evaluation in dried human skull

Gesualdi, Marcos R. R.; Mori, Matsuyoshi; Muramatsu, Mikiya; Liberti, Édson Aparecido; Munin, Egberto

doi:10.1364/ao.46.005419

Cited by 21 publications

(26 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Microscopy: an application in the microdevices surfaces Marcos R. R. Gesualdi [2][3][4][5][6][7]. These crystals, in diffusive regimen, present a much faster hologram recording process and provide less noisy holographic images due to their anisotropic diffraction properties, through which the transmitted object wave and diffracted wave present orthogonal polarization since transmitted object wave can be cut-off by polarizer.…”

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

“…These crystals, in diffusive regimen, present a much faster hologram recording process and provide less noisy holographic images due to their anisotropic diffraction properties, through which the transmitted object wave and diffracted wave present orthogonal polarization since transmitted object wave can be cut-off by polarizer. Usually, in photorefractive holographic interferometry for phase determination is applied the phase-shifting technique [3][4][5][6], where the phase of each point (pixel) of the image is calculated using a sequence of intensity interferograms acquired and combined to generate the phase interferogram. Before each interferogram to be captured a known change of phase in the reference beam is introduced.…”

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

“…In the phase-shifting techniques, the spatial phase measurements are basically accomplished by changing the holographic interferogram intensity by continuous linear mirror micro-displacements and acquisition of the 3, 4, 5 or more holographic interferograms. Many works contributed to the field of real-time holographic interferometry by phaseshifting techniques with photorefractive crystals [3][4][5][6].…”

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

“…The intensity I 0 at a point (x, y) resulting from the superposition of the diffracted (I 0,D ) and the transmitted (I 0,T ) intensities is given by [4][5][6]   …”

Section: Theoretical Conceptsmentioning

confidence: 99%

“…Photorefractive holography is increasingly being used for quantitative measurements of the amplitude and phase of the objects waves in static and dynamic process [1][2][3][4][5][6][7]. In the photorefractive holography, the holographic recording medium is a photorefractive (PR) material.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Photorefractive digital holographic microscopy: an application in the microdevices surfaces

Gesualdi

Brito

Ricardo

et al. 2013

J. Microw. Optoelectron. Electromagn. Appl.

Self Cite

View full text Add to dashboard Cite

Abstract-In this work, we present a Photorefractive Digital Holographic Microscopy (PRDHM) technique based on the writing-reading holographic process in photorefractive Bi 12 TiO 20 (BTO) crystal using the numerical reconstruction of the phase and amplitude image performed by a Digital Holographic Microscopy (DHM) method. We demonstrate that a holographic reconstructed image by diffraction process in photorefractive BTO crystal can be combined with a second reference beam to form a hologram in CCD plane in a DHM setup. The experimental results in a glass slide resolution target and thin film structure was obtained, where, amplitude, phase and 3D phase images are calculated performing digital reconstruction. This technique presents potentials possibilities to obtain 3D phase image of the microdevices for dynamic holography applications.Index Terms-holography; microscopy; non-destructive testing; photorefractive materials. I. INTRODUCTIONPhotorefractive holography is increasingly being used for quantitative measurements of the amplitude and phase of the objects waves in static and dynamic process [1][2][3][4][5][6][7]. In the photorefractive holography, the holographic recording medium is a photorefractive (PR) material. In PR crystals the holographic grating recording are characterized by following light-induced mechanisms: photorefractive (PR) effect, thermo-optic refractive index modulation or photochromic effect [1]. The PR effect consists on the refractive index modulation through charge carriers photo-induction and linear electro-optic effect; the refractive index modulation by thermo-optic effects is due to temperature gradients on the crystal surface; and the photochromic effect is caused by absorption coefficient modulation for high light intensities. These holographic recording materials present advantages like in situ self-processing of recording medium, indefinite reusability, high resolution and low response time. Moreover, PRCs do not present fatigue in dynamic and reversible processes. In Digital Holography by calculating the complex optical field of an image, the amplitude and phase of the optical field are available for direct manipulation [8][9][10][11][12]. The applications of digital holography to microscopy are particularly advantageous because a single hologram records the information of a three-dimensional object space. These advantages have been noted since early in the development of digital holography and applied to imaging analysis of microstructures and biological microscopy [9-12] using CCD sensor as holographic detector. In off-axis holography the angle of incidence of the reference beam is chosen so that when the hologram is reconstructed, the zero order light may be spatially separated from the diffracted holographic reconstruction. The method of offaxis holography involves a high spatial-frequency fringe pattern that must be sufficiently sampled by the CCD, the spatial resolution of the CCD is an important parameter.Recently, some works present the combination of the photorefractiv...

show abstract

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

Section: Photorefractive Digital Holographicmentioning

confidence: 99%

“…The intensity I 0 at a point (x, y) resulting from the superposition of the diffracted (I 0,D ) and the transmitted (I 0,T ) intensities is given by [4][5][6]   …”

Section: Theoretical Conceptsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Photorefractive digital holographic microscopy: an application in the microdevices surfaces

Gesualdi

Brito

Ricardo

et al. 2013

J. Microw. Optoelectron. Electromagn. Appl.

Self Cite

View full text Add to dashboard Cite

show abstract

Photorefractive Effect: Principles, Materials, and Near‐Infrared Holography

Marinova

Lin

Liu

et al. 2016

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

The article consists of two main parts: the first one contains a short summary of the photorefractive effect, discussing the phenomena and the main aspects related to practical applications, followed by a synopsis of the recent progress of photorefractive materials. The second part is devoted to one of the fastest photorefractive materials, sillenite inorganic crystals, focusing in particular on the enhanced photorefractive properties in the near‐infrared spectral range. Examples of real‐time data processing with significant recording speed, as well as realized quasi‐nondestructive holographic recording are also presented. Finally, photonic devices based on the photorefractive nonlinearity, such as optically addressed spatial light modulators and all optically controlled light valves, are discussed.

show abstract

Optical reconstruction of non-diffracting beams via photorefractive holography

et al. 2017

Self Cite

View full text Add to dashboard Cite

This work presents, for the first time the optical generation of non-diffracting beams via photorefractive holography. Optical generation of non-diffracting beams using conventional optics components is difficult and, in some instances, unfeasible, as it is wave fields given by superposition of non-diffracting beams. It is known that computer generated holograms and spatial light modulators (SLMs) successfully generate such beams. With photorefractive holography technique, the hologram of a non-diffracting beam is constructed (recorded) and reconstructed (reading) optically in a nonlinear photorefractive medium. The experimental realization of a non-diffracting beam was made in a photorefractive holography setup using a photorefractive Bi12SiO20 (BSO) crystal as the holographic recording medium, where the non-diffracting beams, the Bessel beam arrays and superposition of co-propagating Bessel beams (Frozen Waves) were obtained experimentally. The experimental results are in agreement with the theoretically predicted results, presenting excellent prospects for implementation of this technique for dynamical systems at applications in optics and photonics.

show abstract

Phase-shifting real-time holographic interferometry applied to load transmission evaluation in dried human skull

Cited by 21 publications

References 24 publications

Photorefractive digital holographic microscopy: an application in the microdevices surfaces

Photorefractive digital holographic microscopy: an application in the microdevices surfaces

Photorefractive Effect: Principles, Materials, and Near‐Infrared Holography

Optical reconstruction of non-diffracting beams via photorefractive holography

Contact Info

Product

Resources

About