We demonstrate a prototype light scattering instrument combining a frequency domain approach to the intermediate scattering function from Super-Heterodyning Doppler Velocimetry with the versatility of a standard homodyne dynamic light scattering goniometer setup for investigations over a large range of scattering vectors. Comparing to reference experiments in correlation-time space, we show that the novel approach can determine diffusion constants and hence hydrodynamic radii with high precision and accuracy. Possible future applications are discussed shortly.

中文翻译：

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用于测量胶体动力学的可变角度超外差动态光散射演示

我们展示了一种原型光散射仪器，它将频域方法与超外差多普勒测速仪的中间散射函数相结合，以及标准零差动态光散射测角仪设置的多功能性，用于研究大范围的散射矢量。与相关时间空间中的参考实验相比，我们表明该新方法可以高精度和准确地确定扩散常数，从而确定流体动力学半径。稍后将讨论可能的未来应用。