Fringes of equal tangential inclination by curvature-induced birefringence

Medhat, M.; Hendawy, N.; Zaki, Ayman A.

doi:10.1016/s0030-3992(02)00120-2

Cited by 12 publications

(12 citation statements)

References 7 publications

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“…(11). Table 1 Plate 1 shows Young's interference fringes from specklegram at different radii of curvature for the Fortypan photographic plate.…”

Section: /R (Cm -1 )mentioning

confidence: 99%

“…Table 1 Plate 1 shows Young's interference fringes from specklegram at different radii of curvature for the Fortypan photographic plate. From the empirical relation [11] between induced birefringence Dn and 1/r, the value of the stored birefringence Dn s after removing the applied stress on the sample is obtained as shown in Fig. 8.…”

Section: /R (Cm -1 )mentioning

confidence: 99%

“…The values of birefringence for quartz and calcite crystals used can be found by substituting in Eq. (11). Table 3 shows the values of birefringence for quartz and calcite crystals at different wavelengths of laser sources.…”

Section: Quartz and Calcite Crystalsmentioning

confidence: 99%

See 2 more Smart Citations

Measuring birefringence of curved sheet and single crystals by double-exposure speckle photography

El-Dessouki

Hendawy

Zaki

2009

Optics and Lasers in Engineering

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“…(11). Table 1 Plate 1 shows Young's interference fringes from specklegram at different radii of curvature for the Fortypan photographic plate.…”

Section: /R (Cm -1 )mentioning

confidence: 99%

Section: /R (Cm -1 )mentioning

confidence: 99%

See 1 more Smart Citation

Measuring birefringence of curved sheet and single crystals by double-exposure speckle photography

El-Dessouki

Hendawy

Zaki

2009

Optics and Lasers in Engineering

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“…The values of thickness and refractive indices of polymer films have been determined by many authors [5][6][7][8][9][10][11][12][13][14][15]. Goodman [5] used IR spectrophotometers to estimate the film thickness and refractive index from the optical interference fringe patterns.…”

Section: Introductionmentioning

confidence: 99%

“…Another attempt has been done by Nasr [11] to estimate the birefringence of thin photoactive polymer films. Medhat et al [12] obtained fringes of equal tangential inclination by curved-induced birefringence. Recently, Sadik et al used a general interferometric approach based on variable incident angle for refractive index and thickness measurement of birefringent single-medium [13] and multi-medium objects [14].…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Highly Birefringent Polymer Films Using Simple Techniques

Shabana

Abdul-Jaleel

2005

International Journal of Polymeric Materials

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Two optical systems are used for characterizing free-standing highly birefringent polymer films. The first system is the Michelson interferometer and is utilized, in the presence of a polarizer, to determine the refractive indices in the two principal vibration directions along and across the axis of the sample, and the birefringence. The second system directly determines the birefringence. It is based on measurements of the optical path difference and the light intensity before and after striking the sample. The results show that the obtained values of birefringence, by the two methods, are in good agreement with each other. Certain optical parameters related to the measured values of refractive indices and birefringence are also calculated. The used methods are recommended for investigating thick and highly birefringent materials, where the conventional methods face certain problems such as the large number of interference fringe order and the highly refractive indices of the used immersion liquids.

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Single shot polarimetric characterization of the polymer based flexible polyethylene terephthalate substrate

Singh

2022

Polymer Engineering & Sci

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Conducting polyethylene terephthalate (PET) substrates used for the flexible electronics and photonics are birefringent in nature. Birefringence of the PET substrate increases with the external applied stress. In this paper, we have studied the state of the polarization of the light transmitted through the flexible PET substrate. Polarimetric characterization of flexible substrate was done for red and yellow wavelengths of light. Single shot three beams interference was recorded by the polarizing Mach-Zehnder interferometer. Interferograms were recorded without bending and different external bending applied to the substrate which increases the stress. The recorded interferograms was analyzed by the Fourier transform fringe (FTF) analysis method. The single shot interferograms have the information of the amplitude and phase of orthogonally polarized field components. Stokes parameters were calculated from orthogonal polarization component extracted from the single shot interferograms analyzed by FTF. Calculated Stokes parameters were plotted on the Poincare sphere to see the change in the state of polarization (SOP) of the light transmitted through these substrates. The change in the SOP of the transmitted light was observed without and with the external stress applied to the PET substrate due to its birefringence characteristic.

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Fringes of equal tangential inclination by curvature-induced birefringence

Cited by 12 publications

References 7 publications

Measuring birefringence of curved sheet and single crystals by double-exposure speckle photography

Measuring birefringence of curved sheet and single crystals by double-exposure speckle photography

Optical Properties of Highly Birefringent Polymer Films Using Simple Techniques

Single shot polarimetric characterization of the polymer based flexible polyethylene terephthalate substrate

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