Characterization of thick and contact lenses using an adaptive Shack–Hartmann wavefront sensor: Limitations and solutions

RM Abdelazeem, MMA Ahmed, M Agour - Optik, 2023 - Elsevier
Lens characterization is a key challenge for reliable optical and imaging techniques. Shack–
Hartmann wavefront sensor (SHWFS) is frequently used as an efficient tool for …

Characterization of optical fibers by two-and multiple-beam interferometry

F El-Diasty - Optics and Lasers in Engineering, 2008 - Elsevier
Optical fibers have many advance and exciting applications, in particular optical
telecommunication and sensing. These applications are depending basically on the fiber …

Characterization of graded index optical fibers by digital holographic interferometry

HH Wahba, T Kreis - Applied Optics, 2009 - opg.optica.org
For the first time to our knowledge, digital holography is used to determine the distribution of
parabolic or nonparabolic refractive index fields in graded index optical fibers. The fiber is …

Characterization of axially tilted fibres utilizing a single-shot interference pattern

TZN Sokkar, KA El–Farahaty, MA El–Bakary… - Optics and Lasers in …, 2017 - Elsevier
We proposed a method to solve the problem of extracting meaningful phase information for
a single-shot interference pattern taken for an axially tilted fibre sample. Conventionally such …

Single-shot digital holography for fast measuring optical properties of fibers

M Agour, K El-Farahaty, E Seisa, E Omar, T Sokkar - Applied Optics, 2015 - opg.optica.org
We propose a fast method for measuring optical properties, eg, the refractive index profile
and birefringence, of fibers. It is based on recovering the phase distribution of light refracted …

Adaptive spatial carrier frequency method for fast monitoring optical properties of fibres

TZN Sokkar, KA El-Farahaty, MA El-Bakary, EZ Omar… - Applied Physics B, 2016 - Springer
We present an extension of the adaptive spatial carrier frequency method which is proposed
for fast measuring optical properties of fibrous materials. The method can be considered as …

Characterization of terahertz wavefront aberrations using computational shear-interferometry

M Agour, C Falldorf, F Taleb… - Optical …, 2022 - spiedigitallibrary.org
We propose a new solution for sensing a terahertz (THz) wavefront based on a THz
reference-less shear interferometer. The key component of the experimental configuration of …

On the digital holographic interferometry of fibrous material, I: Optical properties of polymer and optical fibers

KM Yassien, M Agour, C von Kopylow… - Optics and Lasers in …, 2010 - Elsevier
Digital holographic interferometry (DHI) was utilized for investigating the optical properties of
polymer and optical fibers. The samples investigated here were polyvinylidene fluoride …

Optical microscope: interferometric and non-interferometric optical microscopy techniques

EZ Omar - Non-Destructive Material Characterization Methods, 2024 - Elsevier
Optical microscopes and their extensions are non-destructive essential tools for
characterizing the physical properties of polymeric materials. They are extensively used in …

Shear interferometry for terahertz wavefront sensing

M Agour, C Falldorf, F Taleb… - Terahertz …, 2022 - spiedigitallibrary.org
We propose a new solution for sensing a terahertz (THz) wavefront based on a THz
reference-less shear interferometer. The key component of the experimental configuration of …