24—an Analysts of Fizeau Fringes Crossing a Fibre With a Multiple Skin

El‐Nicklawy, M. M.; Fouda, I. M.

doi:10.1080/00405008008631562

Cited by 32 publications

(11 citation statements)

References 8 publications

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“…The total number ( N ) of molecules per unit volume is determined from the birefringence Δ n and the difference in the polarizabilities of the macromolecules ( P ‖ − P ⟂ ) as follows:38 where P ‖ and P ⟂ are the polarizabilities per unit volume, which can be calculated using the equation used in our previous publication 39…”

Section: Theoreticalmentioning

confidence: 99%

Changes in orientation caused by UV irradiation of nylon 6 fibers

Fouda

Shabana

El‐Sharkawy

2003

J of Applied Polymer Sci

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ABSTRACT:The effect of UV radiation on the structural parameters that relate to the optical properties of nylon 6 fibers are investigated using interferometry. When the optical parameters are known, we can use them to calculate various orientation functions given by Hermans and de Vries. The properties of concern are the surface reflectivity, transparency, stress optical coefficient, stress due to UV irradiation, optical configuration parameter, segment anisotropy, dielectric constant, and susceptibility. The number of molecules per unit volume, isotropic refractive index, polarizability of a monomer unit, specific refractivity of the dielectric (along and across the fiber axis) and the form birefringence were obtained. The results are established by relationships designed to relate the calculated structural parameters to the time of exposure. The study demonstrates how the structural parameters change during exposure to UV radiation. Illustrations are given using graphs and microinterferograms.

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Section: Theoreticalmentioning

confidence: 99%

Changes in orientation caused by UV irradiation of nylon 6 fibers

Fouda

Shabana

El‐Sharkawy

2003

J of Applied Polymer Sci

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“…Barakat and Mokhtar [2] found that the permitted limit is (3/8)λ. In another study [3][4][5][6][7][8][9][10] interference was obtained using synthetic optical fibers. They considered ray optics approximation using monochromatic light emitted from mercury and other spectral lamps.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the fringe shift in multiple beam interference for glass fibers

Hamed

2008

Pramana - J Phys

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A quadratic model is suggested to describe the fringe shift occurred due to the phase variations of uncladded glass fiber introduced between the two plates of the liquid wedge interferometer. The fringe shift of the phase object is represented in the harmonic term which appears in the denominator of the Airy distribution formula of Fabry-Perot's interferometer. A computer program is written to plot the computed fringe shifts of the described model.An experiment is conducted using liquid wedge interferometer where the fiber of a nearly quadratic thickness variation is introduced between the two plates of the interferometer. The obtained fringe shift shows a good agreement with the proposed quadratic model. Also, it is compared with the previous theoretical shift based on ray optics of semi-circular shape.

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“…In the present work, the changes in the optical parameters of nylon-6 fibers due to the annealing 6 fibers with multilayers of skin by applying the following equation 16 :…”

Section: Introductionmentioning

confidence: 99%

Optothermal properties of fibers. X. Temperature dependence of the skin?core structure of nylon-6 fibers

Fouda

El‐Tonsy

Hosny

et al. 1997

J. Appl. Polym. Sci.

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Refractive indices and birefringence for skin and core changes with annealing, produced by different annealing conditions in nylon-6 fibers, were measured interferometrically. Applications were carried out using multiple-beam Fizeau fringes in transmission to determine Cauchy's constants and dispersive coefficients for the fibers. The resulting data were used to calculate the polarizability per unit volume for each layer. By optical microscopy, the geometrical parameters of the fiber cross section were found. The effect of temperature and time of annealing on the refractive index and birefringence for each layer were also investigated. The relationships between temperature and time of annealing with the optical parameters were drawn. Illustrations are given using microinterferograms and curves.

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24—an Analysts of Fizeau Fringes Crossing a Fibre With a Multiple Skin

Cited by 32 publications

References 8 publications

Changes in orientation caused by UV irradiation of nylon 6 fibers

Changes in orientation caused by UV irradiation of nylon 6 fibers

Modeling of the fringe shift in multiple beam interference for glass fibers

Optothermal properties of fibers. X. Temperature dependence of the skin?core structure of nylon-6 fibers

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