| 摘要 |
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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