Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1991-07-01
1994-03-29
Rosenberger, Richard A.
Optics: measuring and testing
By particle light scattering
With photocell detection
356343, 359740, 250574, G01N 2100
Patent
active
052989690
ABSTRACT:
An improved method of collecting quasi-elastic light scattering (also known as QELS) data and time-average intensity simultaneously is disclosed, as is a novel apparatus therefor. The apparatus utilizes a novel optical element having a pair of diametrically aligned slits on a masking disc that eliminates the need of index matching fluids that are currently required to eliminate flare from the sample cell walls at the cell-sample and the cell-air interfaces. The novel optical element allows improved angular resolution and on-axis resolution for the fluctuation data obtained.
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patent: 4676641 (1987-06-01), Bott
patent: 4764013 (1988-08-01), Johnston
patent: 5028135 (1991-07-01), Cheung
Pham Hoa Q.
Rosenberger Richard A.
The University of Akron
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