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首页> 外文会议>Conference on Optical Design and Engineering; Sep 30-Oct 3, 2003; St.Etienne, France >A novel particle sizing technique based on near field scattering
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A novel particle sizing technique based on near field scattering

机译：基于近场散射的新型粒子筛分技术

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摘要

We present a novel technique for particle sizing, based on recent studies about near field speckles, that is simpler than the existing light scattering methods. We first recall the results about the so called near field scattering (NFS) condition for the light scattered by a disordered sample, discussing the main features of this remarkable region of the scattered light. Then we present the two standard configurations (homodyne and heterodyne NFS) adopted for carrying out NFS measurements. The two configurations are critically discussed and the great advantages of the heterodyne scheme are emphasized, such the extremely simple layout, the rigorous subtraction of stray light and the almost zero alignment requirements. Results obtained with suspensions of calibrated polystyrene spheres are presented and discussed.
机译：我们基于有关近场散斑的最新研究，提出了一种用于粒子大小确定的新技术，该技术比现有的光散射方法更简单。我们首先回顾有关无序样品散射光的所谓近场散射（NFS）条件的结果，讨论散射光这一非凡区域的主要特征。然后，我们介绍了用于执行NFS测量的两个标准配置（高差和外差NFS）。严格讨论了这两种配置，并强调了外差方案的巨大优势，例如极其简单的布局，严格的杂散光减法和几乎零的对准要求。介绍并讨论了用校准的聚苯乙烯球悬浮液获得的结果。

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