American Physical Society Sites|APS|Journals|PhysicsCentral|Physics

Session W21: Optoelectronics & Photonics

2:30 PM–5:42 PM, Thursday, March 21, 2013
Room: 323

Sponsoring Unit: FIAP
Chair: Leslie Cohen, Imperial College

Abstract ID: BAPS.2013.MAR.W21.15

Abstract: W21.00015 : Development of an image-analysis light-scattering technique

5:18 PM–5:30 PM

Preview Abstract   Abstract  

Authors:

Saad Algarni
(Physics Deparment, Worcester Polytechnic Institute, Worcester, MA)

Hektor Kashuri
(Physics Deparment, Worcester Polytechnic Institute, Worcester, MA)

Germano Iannacchione
(Physics Deparment, Worcester Polytechnic Institute, Worcester, MA)

We describe the progress in developing a versatile image-analysis approach for a light-scattering experiment. Recent advances in image analysis algorithms, computational power, and CCD image capture has allowed for the complete digital recording of the scattering of coherent laser light by a wide variety of samples. This digital record can then yield both static and dynamic information about the scattering events. Our approach is described using a very simple and in-expensive experimental arrangement for liquid samples. Calibration experiments were performed on aqueous suspensions of latex spheres having 0.5 and 1.0 micrometer diameter for three concentrations of 2 X 10$^{-6}$, 1 X 10$^{-6}$, and 5 X 10$^{-7}$ {\%} w/w at room temperature. The resulting data span a wave-vector range of q $=$ 10$^{2}$ to 10$^{5}$ cm$^{-1}$ and time averages over 0.05 to 1200 sec. The static analysis yield particle sizes in good agreement with expectations and a simple dynamic analysis yields an estimate of the characteristic time scale of the particle dynamics. Further developments in image corrections (laser stability, vibration, curvature, etc.) as well as time auto-correlation analysis will also be discussed.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.W21.15