[Home ] [Archive]   [ فارسی ]  
:: Volume 24 - ::
ICOP & ICPET 2018, 24 - : 717-720 Back to browse issues page
Study of diffusion in liquids using Fresnel diffraction from the edge of a phase wedge
Ahad Saber *1, Sahar Golmohamadi1
1- University of Mohaghegh Ardabili
Abstract:   (631 Views)
In this paper the Fresnel diffraction pattern from the edge of a phase wedge is used to measure the diffusion coefficient of liquids. The diffraction pattern of the wedge contains oblique fringes of equal spacing when its surrounding medium is homogeneous. If the wedge is installed in a cell containing the diffusion liquids, the diffraction fringes of the inhomogeneity of the diffusion media are modulated in the wedge fringes. The diffraction pattern is recorded using a CCD and stored in a computer. The fringes are analyzed using the Fourier transform method and their phase distribution are derived. The refractive index profile inside the diffusion cell is calculated and the diffusion coefficient is derived. For diffusion of sucrose-water solution of 2% and water we derived the diffusion coefficient as D=(0.48 +0.02)*10-5  cm2/s.
Keywords: Diffusion coefficient, Fresnel diffraction, Phase step, Refractive index
Full-Text [PDF 840 kb]   (129 Downloads)    
Type of Study: Research | Subject: Special
Send email to the article author

Add your comments about this article
Your username or Email:


XML   Persian Abstract   Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Saber A, Golmohamadi S. Study of diffusion in liquids using Fresnel diffraction from the edge of a phase wedge. ICOP & ICPET. 2018; 24 :717-720
URL: http://opsi.ir/article-1-1442-en.html

Volume 24 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
Persian site map - English site map - Created in 0.05 seconds with 31 queries by YEKTAWEB 3877