Enhanced short temporal coherence length measurement using Newton's rings interference

WA Ramadan, HH Wahba, AS El-Tawargy - Optics & Laser Technology, 2020 - Elsevier
In this work, we used a simple accurate method to measure the short temporal coherence
length of a light emitting diode. This method is based on accurate visibility determination of …

Employment of Fizeau fringe disintegration to magnify small phase variations

HH Wahba, WA Ramadan, AS El-Tawargy - JOSA B, 2020 - opg.optica.org
When an object produces a small phase variation not less than the minimum phase variation
detectable by the used system and more than the system's noise, the object is considered as …

[HTML][HTML] Retrieving curvature's equation of a radially symmetric concave surface using Fizeau ring fringes

ASED El-Tawargy, WAEM Ramadan, M Nawareg - Results in Optics, 2021 - Elsevier
In this work, we attempt to precisely find out the equation describing the shape of a radially
symmetric concave surface. An experimental interference pattern of Fizeau ring fringes in …

[PDF][PDF] Results in Optics

AS El-Tawargy, WA Ramadan, M Nawareg - researchgate.net
In this work, we attempt to precisely find out the equation describing the shape of a radially
symmetric concave surface. An experimental interference pattern of Fizeau ring fringes in …