An immersion microscopy method for determining the optical anisotropy in fibres using transport intensity equation technique

Omar, E.Z.; El‐Bakary, M. A.

doi:10.1007/s00340-019-7268-y

Cited by 12 publications

(9 citation statements)

References 19 publications

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“…The phase of tested fibrous materials can be demodulated via the TIE technique using the following equation [ 9 , 12 ]; where is the wavelength of the used light, is the captured intensity image at the focus plane, are the captured intensity images at defocus planes up and down, respectively, refers to the separation distance between the two recoding intensity planes, & are the spatial frequencies in Fourier domain, refers to apply Fourier and inverse Fourier transforms, respectively.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Transport of intensity equation (TIE) technique is considered one of the simplest and most accurate techniques to investigate the opto-mechincal and opto-thermal properties of tested fibers [ 9 , 10 ]. Many authors have used the TIE technique to investigate the structural and optical properties of fibrous materials with high degree of accuracy [ 10 – 12 ]. This technique has the ability to demodulate the phase map of the tested samples via linking the variation in axial intensity for optical field with phase [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…To demodulate the phase map using this technique, three intensity images for the tested fiber are needed. One of them is captured at the focus plane and the other two intensity images are captured at defined defocus planes [ 11 , 12 ]. The demodulated phase object via the TIE technique has worthy information such as surface profile, refractive index, degree of crystallinity, and polarizability [ 10 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The demodulated phase object via the TIE technique has worthy information such as surface profile, refractive index, degree of crystallinity, and polarizability [ 10 , 13 ]. The TIE technique has many unique advantages such as stability in measurements, simple optical setup (does not need reference beam), produce directly absolute phase map, capabilities to work with partially coherent source, and does not need iterations (simple calculations) [ 10 , 12 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the opto-thermo-mechanical properties of antimicrobial PET/TiO2 fiber using the transport of intensity equation technique

et al. 2022

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The transport of intensity equation (TIE) technique is used to investigate the effect of stretching and annealing conditions on the optical features and antimicrobial activity of polyethylene terephthalate (PET) fibers treated with TiO 2 nanoparticles. The main core of this paper gets the most preferable optical and mechanical properties for PET/TiO 2 fiber which maintains its antibacterial activity. The variation of the refractive index of untreated PET/TiO 2 fiber along its axis is studied. The computed tomography technique is used to investigate the morphology of the tested fiber and the distribution of TiO 2 nanoparticles inside the fiber. The effect of stretching on the refractive index and the density of TiO 2 nanoparticles of drawn PET/TiO 2 fibers are carried out. The antimicrobial activity of the PET/TiO 2 fibers are evaluated before and after stretching. The PET/TiO 2 fibers are annealed at different temperatures and durations. The influence of annealing on the variation of the refractive index of PET/TiO 2 fiber along its axis and the distribution of TiO 2 is investigated.

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Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the opto-thermo-mechanical properties of antimicrobial PET/TiO2 fiber using the transport of intensity equation technique

et al. 2022

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“…Suitable drawing devices have been attached with these techniques to measure the mechanical properties of suture and polymer materials (El‐Bakary, 2008; El‐Bakary, El‐Farahaty, & El‐Sayed, 2019a, 2019b; Sokkar & El‐Bakary, 2004). In addition, phase shifting interferometry techniques (PSI) and phase extraction method can be used to investigate these optical parameters (Omar, 2020; Omar & El‐Bakary, 2019; Sokkar, El‐Farahaty, El‐Bakary, Omar, & Hamza, 2016).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the mechanical and structural properties of PGA/TMC copolymer for cardiac tissue engineering

El-Sayed

El‐Bakary

Ibrahim³

et al. 2021

Microscopy Res & Technique

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Recently, scientific research has confirmed that a single polymer material cannot meet the ambitions of all surgical requirements. Thus, combinations of different types of polymeric materials are used in order to manufacture different suture materials. A copolymer of Polyglycolide (PGA) and trimethylene carbonate (TMC) is one of the simplest bioabsorbable monofilament sutures. The optical properties of PGA/TMC copolymer surgical suture were investigated by using multiple‐beam interferometric of Fizeau type. The mechanical properties were measured by a suture‐drawing apparatus attached to the multiple‐beam interferometric system. The refractive indices, stress–strain curve, elastic shear modulus, Young's modulus and crosslink density were investigated for the PGA/TMC surgical suture at various draw ratios. The biological activities were conducted by Quantitative Structure Activity Relationships (QSAR) descriptors. Molecular Electrostatic Potential (MESP) maps were used to describe the reactivity and functional active sites for the given molecule. The behavior of stress–strain curve confirms the compatibility of the suture with the sternum which proves that this suture is a good candidate for cardiac operations. Research highlights Fizeau fringes is accurate in characterizing properties of PGA/TMC surgical suture. The biological activities were conducted by (QSAR) descriptors. The compatibility measurements lead to it is a good candidate for cardiac operations.

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FECO fringes for investigating the effect of grafting process on the dispersion properties of polyamaide‐6 fibers

Sokkar

El‐Bakary

Sewidan

et al. 2021

Microscopy Res & Technique

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Polyamide-6 fiber was modified by grafting it with poly(methyl methacrylate) PMMA polymer. The grafting process is widely used in industry to introduce new properties and overcome some obstacles, for instance, in storing energy applications. Multiplebeam interference techniques are very precise techniques to characterize the different properties of polymeric fibers. Fringes of equal chromatic order FECO technique was used to study the effect of grafting process on the dispersion properties of polyamides fibers. A mechanical drawing device was attached to the FECO system to evaluate the mechanical deformation impact on the samples and on their dispersion properties. The dispersion properties were evaluated by measuring their refractive indices, Cauchy's constants, average excitation energy, dispersion energy, lattice energy, interband oscillator wavelength, static dielectric constant, and Abbe's dispersion number. The results show that grafting polyamide-6 with PMMA produced a new material with a different structure and different dispersion properties. Microinterferograms, graphs and tables were given for illustrations.

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An immersion microscopy method for determining the optical anisotropy in fibres using transport intensity equation technique

Cited by 12 publications

References 19 publications

Investigation of the opto-thermo-mechanical properties of antimicrobial PET/TiO2 fiber using the transport of intensity equation technique

Investigation of the opto-thermo-mechanical properties of antimicrobial PET/TiO2 fiber using the transport of intensity equation technique

Characterization of the mechanical and structural properties of PGA/TMC copolymer for cardiac tissue engineering

FECO fringes for investigating the effect of grafting process on the dispersion properties of polyamaide‐6 fibers

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